Windows & doors interview questions

A regional home builder offers your company all the windows for [400] homes a year, at margins well below your retail work. How do you decide?

Situational · Evaluating large contracts

Strong answer

Models margin contribution, crew capacity, slower builder payment terms, warranty exposure and the risk of one big customer, then negotiates or pilots instead of saying yes for volume.

Red flags

Takes it for the revenue headline, or turns it down without running the numbers.

Your main window manufacturer announces a price increase and longer lead times right before your busy season. What do you do?

Situational · Supplier risk

Strong answer

Updates pricing and customer timelines now, qualifies a second supplier, reviews contract terms, and decides how much to depend on one manufacturer long term.

Red flags

Absorbs the increase quietly and hopes lead times improve.

Tell me about a time you slowed sales or turned down work because install crews couldn't keep quality up. What did it cost you?

Behavioral · Growth versus quality

Strong answer

Gives a specific decision, the revenue or opportunity given up, how they explained it to the team, and what improved because of it.

Red flags

Has never traded growth for quality, or describes it only in general terms.

Tell me about a senior hire you got wrong, such as a production leader who couldn't keep install quality up as volume grew. What did you change about how you hire leaders?

Behavioral · Hiring senior leaders

Strong answer

Owns the miss, names the warning signs skipped, such as callback history or how they ran crews before, says how fast they acted, and describes a concrete change like work samples or deeper reference checks.

Red flags

Blames the hire entirely or claims never to have made a bad hire.

Walk me through how you'd decide whether to open a second location in a nearby market.

Technical · Expansion decisions

Strong answer

Looks at market size and competition, lead cost, the cash needed to reach break-even, who would run it, install crew supply, and a branch P&L with clear go or stop points.

Red flags

Decides on gut feel or because a competitor did it.

An installer falls from a ladder on a job and is hurt. Walk me through what you do as CEO in the first week.

Situational · Safety leadership

Strong answer

Makes sure the worker gets care, meets OSHA reporting rules, leads a root-cause review instead of blaming the worker, fixes equipment or methods, and tells the whole company what changed.

Red flags

Treats it as the worker's fault or leaves it all to the insurance company.

Your install backlog keeps growing, callbacks are rising, and installers are working most Saturdays. What do you do in the next [90] days?

Situational · Fixing a strained operation

Strong answer

Finds root causes first, such as remakes, measuring errors and slow job days, fixes quality leaks before adding volume, adds capacity carefully, and sets sales pacing with the sales leader.

Red flags

Hires more installers fast and pushes current crews harder.

Walk me through how you'd build lead-safe work into operations for older homes covered by the EPA renovation rule.

Technical · Lead-safe compliance system

Strong answer

Keeps the firm EPA-certified or certified under your state's program, flags older homes at booking, assigns a certified renovator to each job, hands out the Renovate Right pamphlet, and audits containment, cleaning verification and records.

Red flags

Leaves lead rules to each crew, or treats older homes like any other job unless the customer asks.

Remakes from measuring and ordering errors cost you [your figure] last year. How would you cut that number?

Situational · Cutting remakes

Strong answer

Tracks every remake by cause and person, makes one role own the final measure, checks manufacturer acknowledgments line by line, and trains on the most common errors.

Red flags

Tells everyone to be more careful.

Half your installs are done by employee crews and half by subcontract crews, and quality differs between them. How would you decide on the right mix?

Situational · Employee and subcontract crews

Strong answer

Compares callbacks, cost per install, schedule control, capacity, insurance and classification risk, then sets standards and inspections that apply to both.

Red flags

Picks whichever is cheaper per window without looking at quality or legal risk.

Tell me about a time crews resisted a new step, like photos at each flashing stage. How did you get it to stick?

Behavioral · Leading change

Strong answer

Explains the why, involved field leads early, piloted it, measured results, and held managers accountable after launch.

Red flags

Announced it by email and blamed the team when it faded.

Tell me about the most serious safety problem you've dealt with as a leader, like a lifting injury or a fall during upper-floor work. What did you change afterward?

Behavioral · Learning from safety failures

Strong answer

Describes a real event, a root-cause look at methods and equipment, changes that cost money or time, and follow-up to see they held.

Red flags

Talks only about a new form or training session, blames the injured worker, or can't say what changed in ladders, lifting or upper-floor methods.

Walk me through how you'd build a cash forecast for a company that takes deposits, pays manufacturers before installs, and collects final payment after.

Technical · Cash forecasting

Strong answer

Builds a rolling weekly forecast from signed jobs, deposit timing, manufacturer terms, the install schedule, lender funding delays, payroll and seasonality, and sets a line of credit to cover the tightest weeks.

Red flags

Works from the monthly P&L and assumes profit equals cash.

Sales wants to promote a no-interest financing offer that carries a high dealer fee. How do you evaluate it?

Situational · Evaluating financing offers

Strong answer

Models the fee against expected lift in close rate and job size, checks the effect on margin by job, considers pricing it in, and pilots it with a clear measure.

Red flags

Approves it because sales wants it, or rejects it without numbers.

Walk me through how you'd make sure leaders know the true cost of each job, including remakes and callbacks.

Technical · True job cost

Strong answer

Ties product, labor, sundries, remakes, service trips and financing fees to the job number, reports margin by product line, rep and crew, and reviews misses monthly.

Red flags

Uses a company-wide average margin and can't see which jobs lose money.

Your company offers a lifetime labor warranty on installs. How would you plan for that cost?

Situational · Warranty reserves

Strong answer

Estimates future claims from callback history, sets and reviews a reserve, tracks warranty cost by product and crew, and reports it with the outside accountant's input.

Red flags

Ignores it until claims arrive and pays them from current cash.

Tell me about a time you found a control gap or loss around customer deposits, lender funding or refunds. What did you do?

Behavioral · Internal controls

Strong answer

Describes how it was found, how they protected evidence and people, the fix to the process, and how they confirmed it worked.

Red flags

Has never looked, or handled it informally without changing the process.

Tell me about a time you showed an owner that a popular product line or promotion was losing money once remakes, install time and fees were counted.

Behavioral · Telling leaders hard truths

Strong answer

Brought job-level numbers and options like repricing, changing the offer or dropping it, stayed firm on the facts, and describes what the owner decided and what happened.

Red flags

Went along to avoid conflict, or brought a no with no numbers or alternatives.

Revenue is up this year, but gross margin dropped [4] points. Walk me through how you find out why.

Situational · Diagnosing margin

Strong answer

Breaks margin down by product, job type, rep discounting, crew labor against estimate, material price increases not passed on, remakes and financing fees, then acts on the biggest causes.

Red flags

Cuts costs across the board without finding the cause.

Sales wants a big spring promotion, and production says crews are already booked [8] weeks out. What do you do?

Situational · Balancing sales and production

Strong answer

Gets real capacity and lead-time numbers, sizes or times the promotion to fit, sets honest install dates customers will hear, and plans added capacity if the math supports it.

Red flags

Picks one side without data or runs the promotion and lets production sort it out.

Walk me through how you'd use the gap between sales booked and installs finished each week to judge whether the business is healthy.

Technical · Reading backlog and cash

Strong answer

Tracks backlog in weeks against lead times, booked versus installed revenue, cancellations before install, remakes waiting, deposits held and cash collected, and acts when backlog outruns crews or crews run short of work.

Red flags

Watches booked sales only and doesn't see a growing backlog or idle crews until customers complain.

Tell me about a time you had to replace a sales manager whose team's numbers looked good but whose cancellations and complaints kept climbing.

Behavioral · Replacing a manager over sales practices

Strong answer

Checked cancellations, complaints and finance declines by rep, set clear standards, coached and documented, made the call when nothing changed, and protected customers and reps during the handoff.

Red flags

Kept them because of the numbers, or removed them with no warning, records or plan for the team.

Tell me about a time you brought down callbacks for leaks, hard-to-operate sashes or failed seals. What did you change?

Behavioral · Lowering callbacks

Strong answer

Used callback data by cause, fixed the method or product behind the biggest category, and tracked the result over months.

Red flags

Blamed the manufacturer without data or made no lasting change.

A customer posts a one-star review saying their new door leaks and no one called back for [2] weeks. What do you do?

Situational · Owning customer escalations

Strong answer

Calls the customer personally, gets a tech out fast, replies publicly in a calm, factual way, and finds where the follow-up process broke.

Red flags

Argues in the review reply or hands it off without checking it got fixed.

On a site visit, you suspect a crew skipped the sill flashing on windows they've already trimmed and capped. What do you do?

Situational · Catching hidden flashing errors

Strong answer

Opens one up or checks the crew's install photos to confirm, has the crew fix every affected window before leaving, documents it, talks to the lead privately, and moves inspections ahead of capping.

Red flags

Lets it go because the work is already covered.

You pull up to a two-story job and see an installer at the top of an extension ladder, carrying a window by themselves. What do you do?

Situational · Stopping unsafe work

Strong answer

Stops the work right away and calmly, sets up safe access such as scaffolding or setting the unit from inside with two people, coaches the installer, and checks whether it's a crew habit.

Red flags

Yells and leaves, or lets it slide because the job is almost done.

Walk me through what you check on a finished window install before you sign it off.

Technical · Inspection standards

Strong answer

Operation and locks, even reveals, shims at the right points, foam not bowing jambs, flashing photos, exterior capping and sealant, interior trim, safety glass labels where needed, cleanup, and a homeowner walk-through.

Red flags

Looks only at how the trim and caulk look.

A building inspector fails a job because a new window next to a bathtub doesn't have safety glass. What do you do?

Situational · Code problems

Strong answer

Confirms the requirement, orders the correct tempered unit, tells the homeowner and office what happens next, and fixes the measure checklist so those locations get flagged.

Red flags

Argues with the inspector or blames sales and stops there.

Tell me about a time you were called to a job because a homeowner was upset with the crew, like over dust, trim damage or a messy finish. What did you do?

Behavioral · Handling customer complaints

Strong answer

Listened first, looked at the issue with the homeowner, separated fair complaints from misunderstandings, fixed what was owed, and coached the crew afterward.

Red flags

Sided with the crew automatically or promised things the company couldn't deliver.

Tell me about a change you made to how crews flash or seal windows that cut leaks or callbacks.

Behavioral · Reducing rework

Strong answer

Names the change, such as photo checkpoints or a water test, explains how crews were trained, and gives before-and-after evidence.

Red flags

Describes reminders or speeches with no change in method or results.

The owner wants to add [5] installers as 1099 subcontractors to save money, but they'd drive company trucks and work set hours. What do you advise?

Situational · Worker classification

Strong answer

Explains misclassification risk under federal and state tests for control, tools and schedule, recommends W-2 employees or true independent businesses with their own insurance, and involves employment counsel.

Red flags

Sets it up as asked or doesn't know the classification tests exist.

Walk me through how you'd build a hiring process for installers that predicts who will do quality work.

Technical · Hiring that predicts quality

Strong answer

Starts from the job's real tasks, uses the same structured questions for every candidate, adds a hands-on work sample, checks references, and moves fast because good installers get hired quickly.

Red flags

Relies on unstructured chats and gut feel.

A helper tells you a lead installer keeps making jokes about where the helper's family is from, and asks you not to do anything. What do you do?

Situational · Harassment complaints

Strong answer

Explains the company must act and can't promise full secrecy, protects the helper from retaliation, investigates promptly and fairly, documents, and takes proportionate action.

Red flags

Does nothing because the helper asked, or confronts the lead without an investigation.

Tell me about a time you helped a manager end the employment of a long-time installer. How did you prepare?

Behavioral · Handling terminations

Strong answer

Reviewed documentation and past cases for consistency, checked legal risk, planned the conversation and logistics such as final pay and company property, and treated the person with dignity.

Red flags

Has never prepared one or handled it as a surprise with no records.

Tell me about a time you helped keep installers from leaving during the slow season.

Behavioral · Keeping crews through slow seasons

Strong answer

Planned off-season work, such as service calls, warranty fixes and shop training, was honest about hours, tracked who left and why, and kept the core crew for the busy months.

Red flags

Laid everyone off and hoped they'd return, or didn't know why people left.

Walk me through how you'd track required training and certificates for field staff, such as lead-safe renovator certificates and fall protection training.

Technical · Tracking required training

Strong answer

Builds a role-by-role matrix with expiration dates and reminders, ties it to onboarding and scheduling, audits it, and keeps records ready for OSHA or EPA questions.

Red flags

Keeps copies in personnel files and checks them when someone asks.

Walk me through how you'd count sales that cancel during the cooling-off period or fail financing when you judge a lead source.

Technical · Judging sources by net sales

Strong answer

Tracks each source through set, sit, sale, cancellation, financing approval and install, then compares net installed sales and margin per dollar spent, not gross sales.

Red flags

Counts gross sales or leads and ignores cancellations and finance declines that never become installs.

Sales says leads from a new home show are junk, but your report says the show hit its lead goal. What do you do?

Situational · Lead quality disputes

Strong answer

Pulls set, sit and close rates and average job size by source, listens to the reps' examples, checks how leads were captured, and changes the show plan or the lead form.

Red flags

Defends the lead count and dismisses sales' complaint.

A manufacturer's brochure says its windows save homeowners a set amount on energy each year, and the owner wants that number in our ads. What do you do?

Situational · Honest energy claims

Strong answer

Asks what the number assumes, such as climate, home and old windows, won't present it as a promise, and leans on claims the company can back, like NFRC ratings and ENERGY STAR certification for your climate zone.

Red flags

Runs the number as a promise for every home, or adds bigger savings claims no one can support.

Demand drops every winter, and your budget for the next [3] months stays the same. How do you plan it?

Situational · Planning the slow season

Strong answer

Uses past seasonal data, leans on winter messages like drafts, works old and unsold leads, pushes referrals, and keeps cost per sale and the install backlog in view.

Red flags

Spends evenly on the same ads all year.

Tell me about a promotion you ran that drove calls but hurt margin or the install backlog.

Behavioral · Learning from failures

Strong answer

Gives the numbers, explains what went wrong, such as discounts too deep or more sales than crews could install, when they changed course, and what they do differently now.

Red flags

Calls it a success because calls rose, or blames sales or production.

Tell me about a time you changed a campaign because reps heard homeowners cared more about something else, like noise or drafts.

Behavioral · Working with sales

Strong answer

Describes how they gathered rep feedback, the specific message or offer changed, and the result.

Red flags

Rarely talks to sales or treats their input as complaints.

A homeowner won't make the final payment until a torn screen is replaced, and the crew says it was fine when they left. What do you do?

Situational · Final payment disputes

Strong answer

Thanks the customer, asks for photos, books the fix quickly, agrees on when payment is due once it's done, and logs it so the pattern is visible.

Red flags

Threatens collections or argues about who tore it.

A financed job is done, but the lender won't fund until the customer signs a completion certificate, and the customer is traveling. What do you do?

Situational · Lender paperwork integrity

Strong answer

Contacts the customer for an electronic signature, explains why it's needed, tracks the funding, and never signs or fills it in for them.

Red flags

Signs it for the customer to get paid faster.

Walk me through how you'd set up job files so anyone in the office can find the contract, order, permit, lead-safe records and photos for any job.

Technical · Organizing job files

Strong answer

One job number used everywhere, the same folder structure and file names, a checklist for each stage, and a records retention plan.

Red flags

Files things where they make sense to them at the time.

It's Monday. Payroll is due, two permit applications need to go in, and the phones are ringing because the CSR is out. How do you plan the day?

Situational · Planning a crowded day

Strong answer

Puts deadlines with legal or pay consequences first, sets aside blocks for payroll and permits, arranges call coverage or call-backs, and tells the team the plan.

Red flags

Answers whatever is in front of them and misses a deadline.

Tell me about a time a billing error reached a customer, like a deposit or lender payment not applied. What did you do?

Behavioral · Fixing billing errors

Strong answer

Owned it with the customer, corrected it fast, and changed a step, such as a second check before invoices go out.

Red flags

Fixed that one invoice and changed nothing.

Tell me about a time crews and the office kept missing information like change orders, remakes or lead-safe records. What did you do?

Behavioral · Connecting field and office

Strong answer

Found where the handoff broke, set a simple standard such as required job notes or a daily check-in, and followed up until it stuck.

Red flags

Sent reminders and blamed the crews.

Two installers call out on a morning with three crews booked, and one job is a homeowner who has already been rescheduled twice. What do you do?

Situational · Covering a short-staffed morning

Strong answer

Decides which jobs can be staffed safely (no one-person installs of big units), protects the twice-moved customer, calls affected customers early with real options, and pulls in a lead or supervisor.

Red flags

Sends one person alone to do a two-person install.

Rain is forecast for the afternoon, and two crews are scheduled for full-frame replacements that open up the wall. What do you do?

Situational · Weather planning

Strong answer

Limits openings to what can be closed and flashed before the rain, moves interior or insert work up, makes sure crews have temporary protection, and tells homeowners the plan.

Red flags

Lets crews open every wall and hopes the forecast is wrong.

Walk me through how you decide how many windows a crew can install in a day on a given job.

Technical · Estimating crew output

Strong answer

Considers insert or full-frame, story height and access, trim scope, lead-safe setup, crew experience and drive time, and checks against past job data.

Red flags

Uses one number for every job.

A homeowner calls you directly, upset that the crew left dust on the floors and a screen missing. What do you do?

Situational · Responding to customer complaints

Strong answer

Apologizes, sends someone to make it right quickly, finds the screen, talks with the crew lead, and adds the missed step to the closeout checklist.

Red flags

Defends the crew or promises a fix without scheduling one.

Tell me about a time you cut return trips on installs, such as for missing screens, trim or hardware.

Behavioral · Cutting return trips

Strong answer

Tracked return trips by cause, fixed the step upstream, like staging checks or measure sheets, and shows trips dropped while callbacks held steady.

Red flags

Pushed crews to work faster and longer, or can't say how many return trips there were before and after.

Tell me about a time you dealt with an installer who kept cutting corners on lead-safe setup to save time.

Behavioral · Holding installers to safety rules

Strong answer

Documented it, stopped the unsafe work, made the rule and consequences clear, retrained, followed through, and treated similar cases the same way.

Red flags

Ignored it because good installers are hard to find.

Sales just had a record month, your install backlog is [10] weeks out, and manufacturer lead times are growing. What do you do?

Situational · Backlog and honest dates

Strong answer

Compares crew capacity to the backlog, gives sales and the GM honest install dates, adds vetted capacity carefully, sequences jobs by product arrival, and keeps customers informed.

Red flags

Promises dates to keep sales happy or adds untrained crews to catch up.

Walk me through how you make sure each job meets code before crews show up, including permits, safety glass and bedroom egress.

Technical · Code compliance before install

Strong answer

Uses a measure checklist that flags safety glass and egress locations, verifies orders against it, pulls permits where required, flags older homes for lead-safe work, and schedules inspections.

Red flags

Leaves code questions for the crew to figure out on site.

Your callback rate on patio doors is twice the rate on windows. Walk me through how you'd find out why.

Situational · Finding callback causes

Strong answer

Sorts callbacks by cause, crew, product and opening type, visits jobs, checks the install method for sill support and adjustment, then fixes training or product and tracks it.

Red flags

Blames the door manufacturer without data.

Tell me about a time per-window pay had subcontract installers rushing and quality slipped. What did you change?

Behavioral · Managing subcontract crews

Strong answer

Showed callback data by crew, added photo checkpoints or inspections before payment, required fixes at the sub's cost per the agreement, and stopped using crews that didn't improve.

Red flags

Kept paying per window with no checks because the crews were fast.

Tell me about a time you changed how crews handled large units or upper-floor windows for safety, even though it slowed them down.

Behavioral · Building safety culture

Strong answer

Names the change, explains how they got buy-in, enforced it the same way for everyone, and saw it stick.

Red flags

Talks about safety meetings only, with no change on the job.

A [12]-window order arrives with one cracked unit and one with the wrong grids, and the install is tomorrow. What do you do?

Situational · Handling partial deliveries

Strong answer

Lets the homeowner choose between a partial install now or rescheduling, files the claim and remake order right away, books the return trip, and confirms the openings will be secure.

Red flags

Installs the wrong unit hoping the homeowner won't notice.

Your top-selling rep also has the most cancellations and two complaints about pressure tactics this month. What do you do?

Situational · Protecting customers and the brand

Strong answer

Reviews the deals and complaints, rides along, sets clear standards for honest selling, ties consequences to them, and honors every cancellation.

Red flags

Protects the rep because of the numbers.

Walk me through how you build a monthly sales forecast for in-home window sales.

Technical · Forecasting in-home sales

Strong answer

Works from leads, set and sit rates, close rate and average job by rep, adjusts for season, cancellations and financing approvals, and compares it to install capacity.

Red flags

Takes last month's number and adds a little.

A competitor starts advertising windows at prices your reps say they can't beat, and your close rate drops. What do you do?

Situational · Competing on value

Strong answer

Checks whether the offers are truly comparable, coaches reps on install quality, warranties and product differences, reviews margin with the owner, and avoids a price race.

Red flags

Cuts prices right away.

Installers complain that reps keep turning in measurements and notes they can't use. What do you do?

Situational · Clean sales-to-install handoff

Strong answer

Meets with production, agrees on a measure checklist, trains reps on it, reviews paperwork before orders go in, and holds reps accountable for repeat errors.

Red flags

Says sales' job is to sell, not measure.

Tell me about a rep you coached to explain glass packages and frame materials well enough that homeowners could compare quotes fairly.

Behavioral · Coaching product knowledge

Strong answer

Taught the real differences, such as NFRC numbers, frame materials and install type, in plain words, role-played competitor comparisons, rode along, and tracked close rate and average job.

Red flags

Handed them a brochure or told them to push the top package.

Tell me about a time you let a rep go after repeated measuring or ordering errors that caused remakes. How did you decide?

Behavioral · Letting reps go

Strong answer

Tracked the errors and their cost, retrained and documented, gave a fair timeline, applied the same standard as other reps, and handled the exit respectfully.

Red flags

Kept a costly rep because they sold a lot, or fired on impulse with no records.

Walk me through how you'd store finished windows and doors so they don't get damaged and crews load the right ones.

Technical · Storing finished units

Strong answer

Stores units upright on padded racks or A-frames, never stacked flat, staged by job and install date with clear labels, doors grouped by swing, clear aisles, and a separate area for damaged returns.

Red flags

Piles units wherever there's space and sorts it out on load day.

A crew calls from a job: the truck has a door with the wrong swing, and the right one is still in your warehouse. What do you do?

Situational · Fixing load errors

Strong answer

Gets the right door out fast or helps reschedule, tells the dispatcher and customer, then finds how the wrong unit was staged and fixes the load check.

Red flags

Blames the crew for not checking and leaves it there.

You see a new worker moving a crate of patio doors on a forklift with the load raised high and no spotter. What do you do?

Situational · Forklift safety

Strong answer

Stops them safely, has them lower the load, confirms they've completed OSHA-required forklift training and evaluation, and retrains before they drive again.

Red flags

Lets it go because nothing fell.

Walk me through how you'd measure whether the warehouse is doing a good job.

Technical · Measuring warehouse performance

Strong answer

Tracks order accuracy (right units to the right job), on-time loads, damage rate, inventory accuracy and turns, and reviews them with the team.

Red flags

Judges by whether it looks clean.

Tell me about a time you got a manufacturer or freight carrier to pay for damaged windows or doors. How did you do it?

Behavioral · Recovering damage costs

Strong answer

Noted damage on the delivery receipt, took photos, filed the claim fast, and followed up until it was paid.

Red flags

Signed clean receipts and ate the cost.

Tell me about a time you turned around a warehouse team whose units kept getting damaged in storage or loading.

Behavioral · Leading a warehouse team

Strong answer

Set clear standards, trained, measured damage and load errors, dealt with poor performers directly, and recognized improvement.

Red flags

Did more of the work personally instead of managing.

A caller wants to know what a new window costs before they'll book a consultation. What do you tell them?

Situational · Handling price questions

Strong answer

Explains honestly that price depends on size, style, glass and install type, shares what company policy allows, describes what the visit includes and how long it takes, and offers times.

Red flags

Refuses to say anything useful, or quotes a number no one can stand behind.

A customer says their new windows have water on the inside of the glass on cold mornings and wants them replaced. How do you handle the call?

Technical · Explaining condensation

Strong answer

Asks where the moisture is. Moisture on the room-side glass usually points to indoor humidity, while fog between the panes may be a seal issue. Books a service visit when in doubt.

Red flags

Argues with the customer or promises a replacement without knowing the cause.

A homeowner wants to book a consultation, but the other owner of the home can't be there. How do you handle it?

Situational · Booking with all decision-makers

Strong answer

Explains politely that it helps when everyone deciding can hear the options, offers times that might work, and books it anyway if the customer prefers, noting it for the rep.

Red flags

Refuses to book, or pushes until the customer gets annoyed.

Walk me through what you record after booking a consultation so the sales rep walks in prepared.

Technical · Notes that help the rep

Strong answer

Contact details, address, number and type of windows or doors, what's driving the project, rough age of the home, timeline, who decides, lead source, and access or pet notes.

Red flags

Only a name, phone number and appointment time.

Tell me about a time you handled a lot of calls in a short stretch. What did you do to keep details straight?

Behavioral · Staying accurate when busy

Strong answer

Names specific habits, such as entering notes during the call, reading details back, and finishing records before taking the next call.

Red flags

Relied on memory and fixed records later.

Tell me about a time a customer called angry about a sales visit, such as a long presentation or pressure to sign that day. What did you do?

Behavioral · Handling sales complaints

Strong answer

Listened without defending the rep, wrote down the details, got it to the sales manager the same day, told the customer when they'd hear back and made sure they did.

Red flags

Defended the rep, argued, or offered a discount they had no authority to give.

At [7 a.m.] the supplier calls: today's patio door won't arrive until tomorrow, and the crew is already driving to the job. What do you do?

Situational · Handling late deliveries

Strong answer

Tells the crew right away, checks whether other work on that job can still be done, moves a ready job in if not, calls the homeowner with an honest new date, and updates the schedule.

Red flags

Lets the crew show up and find out, or waits to call the customer until the afternoon.

A customer calls: the front door your crew installed last week won't lock, and every crew is booked today. What do you do?

Situational · Prioritizing urgent service

Strong answer

Treats a door that won't lock as urgent because the home isn't secure, finds the nearest crew or service tech for a short stop, gives the customer a time, and tells the manager.

Red flags

Books the first open slot next week.

Walk me through what you check before you put an older home that needs lead-safe work, or a second-story full-frame job, on a crew's schedule.

Technical · Matching crews to job requirements

Strong answer

Confirms a certified renovator and lead-safe supplies for older homes, the right ladders or staging and enough people for upper-floor units, crew skills for full-frame work, and that the job fits the day.

Red flags

Sends whoever is free without checking certification, equipment or crew size.

Walk me through what you confirm with a homeowner the day before an install.

Technical · Install-day prep with customers

Strong answer

Arrival window and job length, someone home to let the crew in, clear access to each window, blinds and treatments removed, pets, parking, alarm sensors on windows, and payment at completion.

Red flags

Only confirms the date and time.

Tell me about a time you caught a job that wasn't ready before a crew was sent, such as units not checked in or a permit not issued.

Behavioral · Catching jobs that aren't ready

Strong answer

Names the check that caught it, such as matching every job to received and inspected units and permit status, what they did about it, and how they made the check routine.

Red flags

Has no readiness check and finds problems when the crew calls from the driveway.

Tell me about a time a remake or factory delay pushed a homeowner's install back by weeks after they'd planned around it. How did you handle the call?

Behavioral · Delivering bad news

Strong answer

Called as soon as they knew, explained the cause plainly, gave a realistic new date, offered what the company could, such as a partial install, and followed up.

Red flags

Sent a text, guessed at a date, or let the homeowner find out when no one came.

A customer pays a deposit at signing, and their custom windows won't be installed for [8] weeks. Walk me through how you record that deposit and what happens when the job is finished.

Technical · Recording customer deposits

Strong answer

Records it against the job as a customer deposit, not sales, following the company's accounting method, then applies it to the final invoice at completion and reviews the open deposit list each month.

Red flags

Books it straight to sales and loses track of which jobs still owe work.

A lender funds a financed window job but deposits less than the invoice because of its dealer fee. Walk me through how you record it.

Technical · Financing company payouts

Strong answer

Records the full invoice as paid, books the dealer fee as its own expense line, matches the deposit to the job, and reconciles against the lender's funding statement.

Red flags

Records only the net amount and leaves a small balance open on the customer's account.

A window manufacturer bills you for [14] units on a job, but the order in your system shows [12]. What do you do?

Situational · Matching vendor invoices

Strong answer

Checks the purchase order, the receiving record and any remakes or added units, asks production and the vendor, and holds the disputed amount until it's resolved.

Red flags

Pays the bill as written or short-pays it without asking anyone.

A sales rep calls, upset that a commission wasn't paid because the job hasn't been installed yet. How do you handle the call?

Situational · Commission questions

Strong answer

Explains what the written commission plan says about timing, shows the job's status, and sends any real error to the sales manager.

Red flags

Pays early to calm the rep down, or argues without checking the plan or the job.

Tell me about a time the customer deposit balance didn't match the list of jobs still waiting to be installed. How did you find the cause?

Behavioral · Reconciling customer deposits

Strong answer

Matched each deposit to its job and status, found causes like canceled jobs not refunded, deposits applied twice or finished jobs never invoiced, fixed them and set a monthly check.

Red flags

Plugged the difference to a suspense account, or can't explain how deposits should tie to open jobs.

Tell me about a time a manager asked you to record something in a way you thought was wrong. What did you do?

Behavioral · Integrity under pressure

Strong answer

Asked why, explained the concern plainly, took it to the owner or outside accountant if needed, and didn't change the records until it was settled.

Red flags

Did it because the manager said so, or can't recall ever questioning an entry.

Walk me through how you check in a delivery of custom windows before you sign for it.

Technical · Receiving custom units

Strong answer

Counts against the order line by line, checks each label for size, style, color, glass, grids and door swing, inspects for cracked glass and frame damage, and notes problems on the delivery receipt before signing.

Red flags

Signs first and checks later, or only counts boxes.

Your count shows [40] fewer tubes of sealant than the system says, and the crews say they logged everything. What do you do?

Situational · Investigating count gaps

Strong answer

Recounts, checks receipts and returns, compares usage to job estimates, looks for a pattern by truck or crew, fixes the sign-out process, and reports it without accusing anyone.

Red flags

Adjusts the system count quietly to match.

Your supplier says the low-expansion foam crews use is backordered for [3] weeks. What do you do?

Situational · Backorders

Strong answer

Compares stock to scheduled jobs, finds an alternate and checks with production that it's approved for the windows you install, tells crews, and adjusts reorder points.

Red flags

Buys whatever foam is cheapest without asking anyone.

Walk me through how you'd set the reorder point for flashing tape.

Technical · Setting reorder points

Strong answer

Uses average use per job, jobs on the schedule, supplier lead time and a safety buffer for busy season, then reviews it against actual use.

Red flags

Orders more when someone says it's running low.

Tell me about a system you set up or improved to keep inventory records accurate.

Behavioral · Improving inventory accuracy

Strong answer

Names the problem, the change (cycle counts, bin labels, sign-out sheets), how people were trained, and the accuracy result.

Red flags

Describes counting more often with no change in process.

Tell me about a time a window manufacturer kept shipping units with errors, like wrong sizes, wrong grids or damaged glass.

Behavioral · Managing vendor errors

Strong answer

Logged each error against the order and acknowledgment, filed claims with photos fast, showed the vendor's rep the pattern, agreed on fixes, and tracked whether it improved.

Red flags

Fixed each problem one at a time and never showed the vendor the pattern.

Walk me through your in-home appointment from the moment you arrive to when you leave.

Technical · Running the in-home visit

Strong answer

Asks why now and what matters most, inspects windows inside and out, measures, explains options with honest trade-offs, presents price and financing clearly, and explains lead time and cancellation rights.

Red flags

Jumps straight to the pitch and price.

A homeowner asks whether they need triple-pane glass. How do you answer?

Technical · Explaining glass options

Strong answer

Says it depends on climate, noise, budget and frame, explains the NFRC label numbers like U-factor and solar heat gain in plain words, and recommends what fits.

Red flags

Always says yes because it's the bigger sale, or can't explain the label.

At the end of your presentation, the homeowner says they want to think about it and get other quotes. What do you do?

Situational · Handling 'we'll think about it'

Strong answer

Respects it, asks what they're weighing, leaves a clear written quote, sets a follow-up time, and doesn't invent a one-day price.

Red flags

Pushes with a 'today only' discount or gets short with them.

While measuring, you find soft wood at the bottom of [2] openings. How do you handle it with the homeowner?

Situational · Scoping hidden damage

Strong answer

Shows the homeowner, explains possible repair, prices it or adds an allowance per company policy, and notes it clearly for the install crew.

Red flags

Ignores it to keep the price low and leaves it for the crew to find.

Tell me about a sale where something you missed in the measure or scope caused a problem later.

Behavioral · Accuracy on estimates

Strong answer

Owns the miss, explains how it was fixed with the customer and crew, and names the check they added.

Red flags

Says it never happens or blames the installers.

Tell me about your best sales month. What did you do differently that month?

Behavioral · Sustained performance

Strong answer

Names specific behaviors, such as faster follow-up, better needs questions or asking for referrals, and has kept some of them since.

Red flags

Credits luck or a great lead source only.

A homeowner met with a rep [3] weeks ago and didn't buy. Walk me through how you open your first call to them.

Situational · Opening a re-engagement call

Strong answer

Says who they are and why they're calling, asks what the homeowner thought of the visit and what held them back, listens, and only then offers options.

Red flags

Opens with a 'special price' before learning why they didn't buy.

The homeowner says your price was too high and another company quoted less. What do you do?

Situational · Handling price objections

Strong answer

Compares scope line by line (insert or full-frame, glass, warranty, trim, disposal), offers real options such as a different product line, and stays inside company pricing rules.

Red flags

Drops the price without approval or runs down the competitor.

A homeowner signs during your visit to their home, then calls the next day to cancel. Walk me through what you do.

Technical · Cancellation rights

Strong answer

Knows the FTC Cooling-Off Rule and state law give buyers a set window to cancel in-home sales, processes it promptly, returns the deposit, and doesn't pressure them.

Red flags

Argues, delays the refund, or doesn't know cancellation rights exist.

Walk me through how you'd rank unsold quotes when some have old prices, some have expired financing offers and some note rot at the openings.

Technical · Prioritizing a lead list

Strong answer

Puts recent visits and timing-based reasons first, flags quotes that need new pricing or a re-measure, removes do-not-call requests, notes rot for the rep, and logs every outcome in the CRM.

Red flags

Starts at the top of the list and quotes old prices or expired offers.

Tell me about a time a homeowner who turned down a whole-house quote later bought a smaller first phase from you.

Behavioral · Phasing a project

Strong answer

Found what really held them back, such as budget, timing or trust, offered an honest phased plan like the worst windows first, and kept the door open for the rest.

Red flags

Credits calling until the customer gave in, or an unapproved discount.

Tell me about a time you decided to stop pursuing a lead. How did you decide?

Behavioral · Knowing when to stop

Strong answer

Respects a clear no or a request to stop calling, notes the reason, and spends time on better prospects.

Red flags

Never stops calling until the customer blocks the number.

You and an installer need to carry a large picture window from the truck to the back of the house. The path has a step and wet grass. What do you do before you pick it up?

Situational · Handling glass and large units safely

Strong answer

Walks the path first and clears it, agrees on who calls the moves, wears gloves, carries the unit upright on edge, and asks for a third person or a cart if it's too big.

Red flags

Grabs it and goes, carries it flat, or says nothing about a load that feels unsafe.

The installer asks you to pull the old interior trim while they work outside. There's a rug, a couch and family photos near the window. What do you do first?

Situational · Protecting the customer's home

Strong answer

Asks before moving anything valuable, moves or covers furniture and floors with drop cloths, and keeps nails and debris contained as the trim comes off.

Red flags

Starts prying right away and plans to clean up whatever falls on the furniture later.

The installer calls out 'thirty-five and five-eighths' for a piece of trim. Walk me through how you find that on the tape and mark the cut.

Technical · Reading a tape and marking cuts

Strong answer

Finds the inch mark, counts the eighths or sixteenths correctly, marks with a clear V or crow's foot, repeats the number back, and checks the mark before cutting.

Red flags

Guesses at the fraction marks or cuts without checking the number with the installer.

Tell me about a time at work, school or volunteering when you were shown a task once and then had to do it on your own.

Behavioral · Learning a task quickly

Strong answer

Describes watching closely, asking questions or taking notes, doing it, then asking someone to check the first one. Can say what they'd do the same next time.

Red flags

Pretended to understand and didn't ask, or can't describe a real example.

Tell me about a mistake you made at work, school or volunteering that you had to tell someone about. What happened next?

Behavioral · Owning mistakes

Strong answer

Told the person in charge quickly, before it got worse, helped fix it, and explains what they changed so it didn't happen again.

Red flags

Kept quiet until someone else found it, tells it as someone else's fault, or can't say what they changed.

It's the end of a long install day and the crew wants to head out. Describe what the house and yard should look like before the truck leaves.

Situational · Leaving a clean, safe job site

Strong answer

Glass bits and nails picked up, old windows and scrap hauled out, floors vacuumed, furniture back where it was, and tools counted and loaded.

Red flags

Leaves the small stuff for the homeowner or thinks cleanup is someone else's job.

Walk me through how you measure an existing opening for an insert replacement window, from first look to the numbers you hand in.

Technical · Measuring for replacement windows

Strong answer

Checks the frame and sill for rot and square first, measures width in three places and height in three places, uses the smallest, checks diagonals, and notes trim, grids, glass and photos.

Red flags

Takes one measurement each way or trusts the sales measure without checking.

You're doing a full-frame replacement and the old window is out down to the rough opening. Walk me through how you flash the new window so water stays out.

Technical · Flashing a full-frame install

Strong answer

Repairs sheathing, installs a sill pan or sloped sill flashing, sets the unit per the manufacturer, laps tape bottom then sides then head, tucks the wrap over the head, leaves the sill able to drain, and air seals inside.

Red flags

Relies on exterior caulk, laps flashing backward, or seals the sill so water can't get out.

The house is old enough to have lead paint, and you'll be pulling painted wood windows. Walk me through how you set up and clean up.

Situational · Working lead-safe

Strong answer

Follows the certified renovator's lead-safe plan: plastic containment, warning signs, misting and scoring paint before prying, no open-flame burning or power sanding without a HEPA shroud, HEPA vacuum and wet cleaning, bagged debris and cleaning verification.

Red flags

Thinks a dust mask is enough or sweeps up paint chips with a broom.

You pull an old window and find the sill and framing below it soft with rot. The job was sold as a simple insert. What do you do?

Situational · Handling hidden damage

Strong answer

Stops, photographs it, calls the lead or office before going past scope, explains it honestly to the homeowner, waits for an approved change order, and makes the opening weathertight if it can't be finished today.

Red flags

Covers the rot with the new window and capping or does extra work without approval.

Tell me about a callback on a window or door you installed. What caused it?

Behavioral · Learning from callbacks

Strong answer

Names a specific cause, such as a sash out of square or a leak at the head, owns it, and describes a habit they changed, like checking reveals or water testing.

Red flags

Blames the product or homeowner every time or can't name one.

Tell me about a time a homeowner didn't like how something looked after you finished, like a trim gap or a caulk line. How did you handle it?

Behavioral · Homeowner communication

Strong answer

Listened, looked at it with them, fixed what was fair, explained what's normal in plain words, and checked they were satisfied before leaving.

Red flags

Argued, got defensive, or left without resolving it.

Walk me through how you install a prehung entry door so it closes, seals and locks right for years.

Technical · Installing entry doors

Strong answer

Preps a level, supported sill with a sill pan, sets the unit plumb and square, shims at hinges and strike, adds a long screw into framing at the top hinge, checks reveals and weatherstrip contact, and flashes the exterior.

Red flags

Shims only the corners, skips the sill pan, or planes the slab to fix a bad hang.

Your newest installer is slow and keeps setting windows out of level, and you have [8] windows left today. What do you do?

Situational · Coaching under time pressure

Strong answer

Stops and shows the method once, checks the next window right away, splits the work so quality holds, and follows up at day's end instead of quietly taking over.

Red flags

Takes over without explaining, yells, or lets it slide to finish on time.

On your walk-through, you see the new insert window for a bedroom will make the clear opening smaller than the old one. What do you do?

Situational · Catching egress problems

Strong answer

Checks whether the opening will still meet bedroom egress under the code your area enforces, and if not, holds that unit, calls the office before installing, and explains the issue to the homeowner.

Red flags

Installs it anyway because it's what was ordered.

A homeowner reports water on the sill of a window your crew installed last month, but only in wind-driven rain. Walk me through how you find the cause.

Technical · Finding leaks

Strong answer

Checks outside first (head flashing, capping, sealant gaps, blocked weeps, mulled joints), water tests in sections from the bottom up, rules out condensation, and fixes the cause instead of adding caulk.

Red flags

Caulks everything on the outside and hopes.

Tell me about an installer you trained to flash and set windows right on their own. What made the difference?

Behavioral · Developing installers

Strong answer

Describes a clear method (show, watch, give feedback, hand over more), the skills taught first, and how they judged the person was ready to work alone.

Red flags

Says the trainee just watched and picked it up.

Tell me about a time you found a problem in your crew's work after the trim was on, like missing shims or skipped flashing.

Behavioral · Owning crew quality

Strong answer

Tore it back and fixed it even when it cost time, told the office, and used it to coach the crew.

Red flags

Covered it up or blamed one crew member in front of the customer.