Exterior cleaning interview questions

Residential house washing is your core, but commercial property managers want regular concrete and building cleaning. How would you decide how far to go?

Situational · Service mix strategy

Strong answer

Compares margins, equipment needs such as hot water and water recovery, crew skills, payment terms and seasonality, and grows the work that fits.

Red flags

Chases every contract offered.

A city inspector warns your crew about wash water going into a storm drain. What do you do as CEO?

Situational · Environmental responsibility

Strong answer

Takes it seriously, learns the local rules, invests in water recovery or blocking where needed, trains crews, and makes it a standard rather than a one-time fix.

Red flags

Tells crews not to get caught.

Tell me about a big business mistake you made, such as a bad hire, the wrong equipment purchase or a contract that lost money. What did you change after it?

Behavioral · Learning from mistakes

Strong answer

Owns it plainly, explains what it cost, and describes a lasting change in how they decide or operate.

Red flags

Blames others or can't name one.

Tell me about a time you hired a key leader. How did you decide, and how did it go?

Behavioral · Building the team

Strong answer

Names the role, what the person needed to own, how they tested candidates (structured interviews, references, a work sample), and how it turned out, including what they'd change.

Red flags

Hired a friend without a real process.

How would you build a reputation that lets you charge more than low-price operators with a pressure washer and a truck?

Technical · Brand and reviews

Strong answer

Insurance and training customers can verify, consistent results, damage-prevention practices, honest reviews, and clear communication before and after every job.

Red flags

Lowers prices to compete.

Your two best crew leads tell you they plan to leave and start their own pressure washing company. What do you do?

Situational · Keeping key leads

Strong answer

Meets each to learn what's driving it, weighs a real path such as a branch role, profit share or a pay change, keeps customer relationships through good service, makes no threats, and checks any agreements with counsel.

Red flags

Threatens to sue, or cuts their hours right away.

How would you build a system that prevents property damage across all crews?

Technical · Damage prevention

Strong answer

A pre-job walk-around with photos, written methods and mix strengths by surface, plant protection steps, checks for outlets, seals and loose siding, and claim reviews that feed training.

Red flags

Tells crews to be careful.

Some crews finish by noon and others work until dark. What do you do?

Situational · Crew scheduling

Strong answer

Looks at estimates versus actual time, job mix and skill, fixes estimating and balances routes.

Red flags

Tells the fast crews to slow down.

Tell me about a time you added crews or locations. What did you put in place first?

Behavioral · Scaling

Strong answer

Names what was in place first (a trained lead, written mix and pressure rules by surface, equipment and training sign-offs) and shows callbacks, claims and margin through the growth.

Red flags

Grew first and fixed problems later.

Tell me about a time you held a crew lead or manager accountable for repeated mistakes, such as damage claims.

Behavioral · Accountability

Strong answer

Set clear expectations, documented each incident, offered training and support, and followed through on consequences when it continued.

Red flags

Kept giving chances without consequences.

Last week a technician slipped on a roof wet with soft-wash mix and caught the gutter. What do you change in your fall protection rules?

Situational · Roof fall protection

Strong answer

Cleans roofs from the ground or a ladder with soft-wash reach where possible, requires a harness and rated anchor whenever someone is on a roof, bans walking treated or wet roofs without it, and adds training sign-offs and spot checks.

Red flags

Tells the crew to be more careful and changes nothing.

House-wash callbacks are rising, mostly for streaky siding and missed areas under eaves. What do you do?

Situational · Callbacks

Strong answer

Sorts by crew and cause, checks mix strength, dwell time and rinsing, retrains, and tracks the trend.

Red flags

Offers free re-washes without finding the cause.

Operations wants a hot-water trailer and a water recovery system for commercial work. How do you evaluate it?

Technical · Equipment investment

Strong answer

Compares cost and financing to the commercial revenue it unlocks, utilization, maintenance and the compliance risk it reduces.

Red flags

Approves or rejects on price alone.

Most cash comes in from spring through fall. How do you keep the company healthy through winter?

Situational · Seasonal cash

Strong answer

Weekly cash forecasting, a reserve built in peak months, a credit line set up in advance, and planning winter work or prepaid plans.

Red flags

Uses the credit line every winter without a plan to pay it down.

Tell me about a time you found that a service was priced too low. What did you do?

Behavioral · Pricing analysis

Strong answer

Explains the analysis, such as job time and chemical cost against price, the price or scope change, and the margin result.

Red flags

Has no example, or raised every price at once.

Tell me about a time you talked leadership out of a costly decision, such as a big equipment purchase or a low-margin contract.

Behavioral · Influencing leadership

Strong answer

Brought data, offered alternatives leaders could accept, and kept the working relationship.

Red flags

Stayed quiet, or argued without numbers.

Small damage claims are adding up. How do you decide which ones the company pays directly and which go to insurance?

Situational · Claims and insurance

Strong answer

Compares claim size to the deductible, the effect on premiums, and customer goodwill, and sets a written policy with operations.

Red flags

Files every claim, or pays every claim without tracking.

A large property management client wants long payment terms. What do you do?

Situational · Commercial terms

Strong answer

Models the cash impact, negotiates terms or pricing to match, and checks the client's payment history.

Red flags

Accepts whatever terms they ask.

How would you decide which services to push and which to drop?

Technical · Service profitability

Strong answer

Looks at margin per crew hour, demand, equipment use, damage risk and how each service leads to repeat work.

Red flags

Keeps every service because customers ask.

Three damage claims this month came from the same crew. What do you do?

Situational · Damage trends

Strong answer

Reviews each claim, rides along, retrains or reassigns, and checks the lead's role.

Red flags

Pays the claims and moves on.

Tell me about a time you changed prices. How did customers react, and what happened to margin?

Behavioral · Pricing

Strong answer

Explains the reasoning, how they told customers, how bookings changed, and the margin result.

Red flags

Has never changed prices.

Tell me about a time you had to replace a crew lead or manager. How did you handle it?

Behavioral · Managing managers

Strong answer

Had clear expectations and documentation, made the call fairly, and had a plan to cover the crew and customers.

Red flags

Waited until customers complained.

A shopping center wants night cleaning of sidewalks and dumpster pads. What do you work out before agreeing?

Situational · Commercial growth

Strong answer

Night staffing and lighting, hot water and grease handling, wastewater rules, insurance and price.

Red flags

Says yes and sends a day crew at night.

Spring is coming. How do you get the branch ready?

Situational · Season planning

Strong answer

Hiring and training early, equipment serviced, chemicals stocked, past customers contacted and estimates scheduled.

Red flags

Waits for the phone to ring.

What do you check when you inspect a finished house wash?

Technical · Quality inspection

Strong answer

Even results with no streaks or missed areas, rinsed windows and fixtures, plants rinsed and healthy, no chemical spots on cars or surfaces, gutters and downspouts clear, and a walk-around with the customer.

Red flags

A quick look from the driveway.

You arrive to find a technician on a roof without fall protection. What do you do?

Situational · Stopping unsafe work

Strong answer

Has them get down safely right away, sets up proper protection or another method, explains the risk and documents for coaching.

Red flags

Lets them finish since they're nearly done.

A customer says the crew's chemicals killed part of their shrubs. What do you do?

Situational · Damage response

Strong answer

Looks with the customer, checks job notes and photos, asks the crew what was done to protect plants, documents and follows the damage process fairly.

Red flags

Says the plants were already dying.

Tell me about a time you coached a technician who kept making the same mistake, such as streaks or overspray.

Behavioral · Coaching

Strong answer

Found the reason (technique, equipment or rushing), retrained on site, checked their next jobs, and followed through.

Red flags

Kept fixing it for them.

Tell me about a time you kept a customer after a job went wrong at their home.

Behavioral · Customer recovery

Strong answer

Explains what went wrong, how they owned it with the customer, the fix, and that the customer stayed or booked again.

Red flags

Only offered money.

Your crew is about to wash a stucco home with old windows and lots of landscaping. What do you cover in the briefing?

Situational · Pre-job briefings

Strong answer

Low pressure and spray angle to avoid forcing water behind stucco and window seals, plant pre-wetting and rinsing, outlet and fixture protection, and a final walk-around.

Red flags

Tells them to get started.

What training must a new technician complete before running a pressure washer or mixing chemicals alone?

Technical · Safety training

Strong answer

Machine operation and injection-injury risk, chemical labels and safety data sheets, protective gear, ladder and roof rules, plant protection, with hands-on sign-offs recorded.

Red flags

A ride-along day and nothing more.

You need to staff up for spring and down for winter. How do you handle it fairly and keep good people?

Situational · Seasonal staffing

Strong answer

Plans hiring early, is honest about seasonal hours, keeps a rehire list, and works with leadership on winter work for top performers.

Red flags

Hires in a rush and lets people go without notice.

A customer says a technician was rude and used their bathroom without asking. What do you do?

Situational · Investigations

Strong answer

Gets details, talks to the tech and crew separately, applies the conduct policy consistently and documents.

Red flags

Fires the tech on the customer's word, or ignores it.

Tell me about a time you wrote or rewrote a safety or conduct policy for field staff. How did you roll it out?

Behavioral · Writing field policies

Strong answer

Explains why the policy was needed, how they got input from crews and leads, how they trained people on it, and how they checked it was followed.

Red flags

Emailed a new policy and assumed people read it.

Tell me about a time you reduced turnover among outdoor or field workers.

Behavioral · Improving retention

Strong answer

Found the causes through exit and stay conversations, made specific changes such as pay, schedules or training, and shows the before-and-after numbers.

Red flags

Has no measured result.

Technicians tow trailers loaded with water tanks and pressure washers. What do you require before someone tows one?

Situational · Driver policy

Strong answer

A valid license, a driving record check after a conditional offer with written consent, a check of whether the truck-and-trailer weight brings DOT or CDL rules, hands-on towing training, and a written policy with accident reporting.

Red flags

Assumes anyone with a license can tow.

It's late winter. How would you fill the spring schedule?

Situational · Seasonal marketing

Strong answer

Reminds past customers early, offers bundles like house and driveway, targets neighborhoods near routes, and paces offers to crew capacity.

Red flags

Waits until spring when the phone rings.

How would you measure which channels bring in profitable jobs?

Technical · Measuring channels

Strong answer

Tracks lead source, close rate, average job and repeat rate by channel, and compares cost per booked job.

Red flags

Counts leads only.

The owner wants ads that say 'safe for plants and pets, guaranteed.' What do you do?

Situational · Honest claims

Strong answer

Pushes back on absolute guarantees, describes the real protective steps, and gets operations to confirm the wording.

Red flags

Runs it as written.

Tell me about how you've used before-and-after photos. How did you handle permission?

Behavioral · Before-and-after content

Strong answer

Got written permission, avoided house numbers and faces, and used real photos.

Red flags

Posted whatever crews sent.

Tell me about a promotion for a home service, such as a spring house-wash offer, that didn't pay off. What would you do differently?

Behavioral · Campaign results

Strong answer

Names the offer and channel, the numbers (cost per booked job, jobs booked against crew capacity), why it fell short, and the specific change they'd make.

Red flags

Thinks every campaign worked.

Most customers buy only a house wash. How would you get them to add gutters or roof cleaning?

Situational · Cross-selling

Strong answer

Uses timing and photos from the job, offers bundles, trains crews to point out real needs honestly, and tracks attach rate.

Red flags

Has crews push every add-on.

How do you keep the company's chemical safety paperwork current for the shop and every truck?

Technical · Chemical safety records

Strong answer

A current safety data sheet for every product in the shop and on each truck, updates when a product changes, labeled secondary containers, and a log of each worker's hazard communication training.

Red flags

Keeps an old binder and doesn't know what's on the trucks.

A commercial client says they were billed for a full parking garage wash when only two levels were done. What do you do?

Situational · Partial-work billing

Strong answer

Checks the work order, crew notes and photos, confirms with the crew lead, corrects the invoice if it's wrong, and fixes how partial work gets reported.

Red flags

Defends the invoice without checking.

A shopping center wants to be named as an additional insured on your policy and needs its vendor agreement signed before Monday's job. What do you do?

Situational · Commercial paperwork

Strong answer

Gets the exact wording required, asks the agent for the endorsement and certificate, has the agreement reviewed for risky terms, and confirms everything before Monday.

Red flags

Sends an old certificate.

Tell me about a system you built that made a busy office run better.

Behavioral · Office systems

Strong answer

Explains the problem, the system, how people were trained on it, and a measured result such as fewer errors or faster invoicing.

Red flags

Has no example.

Tell me about a time you handled a billing complaint that turned out to be the company's error.

Behavioral · Customer service

Strong answer

Owned it, fixed the bill quickly, apologized, and changed the process that caused the error.

Red flags

Defended the invoice.

The owner asks for a list of every job where a certain chemical was used last month. How do you produce it?

Situational · Records

Strong answer

Pulls job records with products and mix noted, and if those aren't recorded, fixes the work order so they are.

Red flags

Asks crews to remember.

How do you build a weekly schedule for crews doing houses, roofs, concrete and gutters?

Technical · Scheduling

Strong answer

Groups by area and service, matches crew skills and equipment, uses estimated hours, and leaves room for weather.

Red flags

Books first come, first served.

On hot, sunny afternoons, crews report soft-wash mix drying on siding before they can rinse. What do you change?

Situational · Hot-weather washing

Strong answer

Schedules sunny sides for early or late in the day, has crews work smaller sections, keeps glass, plants and fixtures wet, follows the mix sheet, rinses before mix dries, and watches callbacks for spotting.

Red flags

Tells crews to spray faster.

A technician got a minor chemical splash in the eye. After first aid, what do you do?

Situational · Safety

Strong answer

Gets medical care as needed, reports it, finds why goggles weren't worn or failed, fixes it and shares the lesson.

Red flags

Tells the tech to be more careful.

Tell me about a time you got crews to share equipment or work together better on big jobs.

Behavioral · Team leadership

Strong answer

Names the problem, the change such as shared schedules or clear roles, and the result.

Red flags

Can't name a specific change.

Tell me about a time you managed an operating budget and had to cut costs.

Behavioral · Budget management

Strong answer

Explains what was cut, such as fuel or idle time, how they protected quality and safety, and the savings.

Red flags

Cut safety gear or training.

A homeowner calls, angry that overspray spotted their new car, and says they'll post a review tonight. How do you handle it?

Situational · Customer escalations

Strong answer

Apologizes, has it cleaned or detailed properly, documents, and fixes the cause such as asking customers to move cars and rinsing overspray.

Red flags

Says the car should have been moved.

You're cleaning twelve apartment buildings over three weeks while residents are home. How do you plan communication?

Situational · Resident communication

Strong answer

Notices ahead of each building (close windows, move cars, keep pets in), a schedule with the property manager, a contact for questions and daily updates.

Red flags

Lets the property manager tell residents.

How do you build the budget and schedule for a large commercial pressure washing contract?

Technical · Budget and schedule

Strong answer

Measures areas and surfaces, sets crew productivity and equipment, accounts for water source, recovery rules, access or lifts, night work and weather days, and adds contingency.

Red flags

Uses a price per square foot and a guess.

Halfway through, the property manager adds four more buildings at the same price. What do you do?

Situational · Scope creep

Strong answer

Documents the change, prices it, gets written approval before the crew starts the added work, and adjusts the schedule.

Red flags

Does it to keep them happy.

A resident says your crew damaged their patio furniture. What do you do?

Situational · Damage claims on projects

Strong answer

Gets details and photos, checks with the crew, involves the property manager, and follows the claims process fairly.

Red flags

Ignores it because the contract is with the property manager.

Tell me about a project that fell behind. How did you get it back on track?

Behavioral · Project delivery

Strong answer

Explains the cause, the recovery plan with crews and the client, how they communicated, and the outcome.

Red flags

Blames weather and crews.

Tell me about a time you had to deliver bad news to a client, such as a delay or damage on their property.

Behavioral · Client relationships

Strong answer

Told the client early with the facts and a plan, kept them updated, and followed through.

Red flags

Hid it until it couldn't be hidden.

Crews say estimates keep missing heavy mildew, roof pitch and access problems. What do you do?

Situational · Estimate accuracy

Strong answer

Compares estimates to job results, adds an estimate checklist and photo rules, retrains reps and tracks accuracy by rep.

Red flags

Tells crews to work faster.

How should reps price house washes, roofs, concrete and gutters?

Technical · Pricing structure

Strong answer

Ties each to labor time and risk (stories, pitch, condition), adds minimums, bundles and clear discount limits.

Red flags

One rate for everything.

Tell me about a time you helped a rep raise their close rate on house wash or roof cleaning estimates.

Behavioral · Coaching

Strong answer

Diagnosed the gap through estimate reviews or ride-alongs (no photos of the problem, unclear results, no follow-up), practiced with them, and measured the change in close rate.

Red flags

Told them to try harder.

Tell me about a commercial property account, like an HOA or shopping center, you helped win. How did you do it?

Behavioral · Commercial sales

Strong answer

Names the account and decision-maker (board, property manager), the problem they solved (scheduling around residents, water recovery, insurance paperwork), and how they priced it to make money.

Red flags

Has only residential experience and no plan.

The owner asks for a spring sales forecast. How do you build it?

Situational · Forecasting

Strong answer

Uses last spring, rebooking rates, open estimates and marketing plans, checked against crew capacity.

Red flags

Gives a gut number.

A rep keeps selling roof cleanings with promises about results that crews can't deliver. What do you do?

Situational · Overselling

Strong answer

Talks with the rep, reviews their scripts, corrects the promises with affected customers and ties pay to satisfaction.

Red flags

Ignores it because sales are up.

How should sodium hypochlorite, acids and other chemicals be stored at the shop?

Technical · Chemical storage

Strong answer

Separate areas so bleach never meets acids, cool shaded storage, vented caps, secondary containment, labels, safety data sheets and a spill kit.

Red flags

All on the same shelf.

Pumps and engines keep failing mid-season. What do you put in place?

Situational · Equipment maintenance

Strong answer

Maintenance by hours, daily checks by crews, logs per unit, spare parts and backup units.

Red flags

Repairs as they break.

You find a crew testing a gas pressure washer inside the closed shop. What do you do?

Situational · Indoor engine safety

Strong answer

Shuts it off right away because of carbon monoxide, ventilates and makes a rule that engines only run outside.

Red flags

Opens a window and lets them finish.

Tell me about a time you tracked equipment costs by unit and used them to decide whether to repair or replace something.

Behavioral · Repair or replace decisions

Strong answer

Kept repair logs and costs for each pump, engine or trailer, compared them to replacement cost and downtime, and made a clear call.

Red flags

Repaired everything until it died, with no records.

Tell me about a time you got faster repairs on engines or pumps from a vendor.

Behavioral · Vendor management

Strong answer

Set expectations with the vendor, tracked turnaround, kept spares, and found a backup shop.

Red flags

Waited in line every time.

What do you check on a pressure washing trailer before it leaves the yard?

Technical · Trailer safety

Strong answer

Hitch, chains and lights, tires, tanks and equipment secured, chemical containers closed and strapped, and nothing leaking.

Red flags

Trusts the crew to check it.

A customer asks whether the soft-wash chemicals are safe for their dog and vegetable garden. What do you say?

Situational · Chemical safety questions

Strong answer

Explains honestly what the crew uses and how they protect plants and pets, asks them to keep pets inside during the job, and offers to have the lead call if they want more detail.

Red flags

Says the chemicals are totally harmless.

A customer wants their roof cleaned and asks if it will look new the same day. What do you tell them?

Situational · Setting expectations

Strong answer

Explains that black streaks often fade soon after treatment while moss and lichen can take weeks or longer to loosen and wash away, uses the company's wording, and doesn't promise a brand-new look.

Red flags

Promises it will look brand new right away.

What do you need to know when booking a house wash?

Technical · Booking details

Strong answer

Home size and stories, siding type, problem areas, outdoor water spigot access, plants and pets, vehicles to move, gate codes and whether the customer will be home.

Red flags

Address and date only.

Tell me about a time you handled a customer who was angry about damage. What did you do?

Behavioral · Complaint handling

Strong answer

Listened, documented, didn't argue, explained next steps and followed through.

Red flags

Argued or passed it on immediately.

Tell me about a time you handled many calls during a busy spring or summer. How did you keep things organized?

Behavioral · Juggling the phones

Strong answer

Logged every call in the system, scheduled callbacks, confirmed details back to customers, and nothing fell through.

Red flags

Lost track of some customers.

A customer says their HOA requires proof of insurance before work. What do you do?

Situational · HOA questions

Strong answer

Gets the HOA's exact requirements, requests the certificate from the office and confirms it's sent before the job date.

Red flags

Tells the customer to handle it.

Overnight temperatures will drop below freezing tomorrow, and four house washes are booked for early morning. What do you do?

Situational · Weather calls

Strong answer

Works with the supervisor on whether to start later or move jobs, since water can freeze on driveways and walkways, and calls customers early with new times.

Red flags

Keeps the schedule and lets crews deal with ice.

A crew arrives and the customer's outdoor spigot is shut off, and the customer isn't home. What do you do?

Situational · Water supply problems

Strong answer

Calls the customer, checks whether the truck carries enough water for part of the job, moves the crew to the next job if not, and reschedules.

Red flags

Tells the crew to wait indefinitely.

How do you decide which crew gets a roof cleaning versus a driveway job?

Technical · Matching crews

Strong answer

Matches roof experience and fall protection gear, equipment like soft-wash pumps or surface cleaners, and two-person needs, then groups by area.

Red flags

Sends whoever is closest.

Tell me about a day when weather or breakdowns wrecked the schedule. How did you put it back together?

Behavioral · Handling changes

Strong answer

Explains how they ranked jobs, who they called and when, how crews were reassigned, and what they changed afterward.

Red flags

Can't describe a specific day.

Tell me about a time you had to get an urgent change to a crew in the field, such as a cancelled job or a safety warning. How did you make sure they got it?

Behavioral · Clear communication

Strong answer

Called rather than only texting, had the lead repeat it back, updated the job in the app, and checked that the crew acted on it.

Red flags

Sent one text and assumed.

A crew is behind because the first house had far more mildew than estimated. What do you do?

Situational · Running behind

Strong answer

Tells the next customers early, adjusts the day, and flags the estimate gap to sales.

Red flags

Tells the crew to rush.

How would you track the cost of each job so the owner knows which services make money?

Technical · Job costing

Strong answer

Codes crew hours, chemicals, fuel and equipment costs to jobs or service types, separates house washing, roofs, concrete and gutters, and reports margin by service.

Red flags

One expense pool for everything.

Technicians earn a commission on each job instead of an hourly wage. What do you check before payroll goes out each week?

Situational · Commission payroll

Strong answer

Checks that each tech's pay covers minimum wage for every hour worked, including drive time between jobs, figures overtime with commission in the regular rate unless counsel confirms an exemption, and flags gaps to the owner.

Red flags

Pays the commission only, assuming wage and hour rules don't apply to commission pay.

The company paid a customer for plants killed during a soft wash. How do you record it, and what do you track?

Situational · Damage claim payments

Strong answer

Records it as a damage or claims expense tied to the job, keeps the documentation, and tracks claims so the owner can see patterns and decide on insurance.

Red flags

Records it as a refund on sales and loses the pattern.

Commercial clients pay on long terms. How do you keep receivables under control?

Technical · Commercial receivables

Strong answer

Invoices promptly with the client's required details, reviews the aging report weekly, follows up before due dates, and escalates past-due accounts.

Red flags

Waits for checks to arrive.

Tell me about a time you found a mistake in your own entries after a report had gone to the owner. What did you do?

Behavioral · Accuracy

Strong answer

Told the owner promptly, gave corrected figures, explained the cause, and changed a step in their routine so it wouldn't repeat.

Red flags

Hoped no one would notice.

Tell me about a time you got field staff to turn in receipts or time records on time.

Behavioral · Working with field staff

Strong answer

Names the fix (photo receipts in the app, a weekly cutoff, time entered at each job), explains how it tied to accurate pay or job costing, and shows on-time turn-ins improved.

Red flags

Chased the same people every week without a fix.

What do you track for each chemical and supply item the crews use?

Technical · What to track

Strong answer

Use per crew and per job type, reorder points and lead times, the date each container arrived, a safety data sheet on file, and cost per job so the owner sees what each service uses.

Red flags

Counts the shelf at the end of the month.

One crew uses far more chemical per house than the others. What do you do?

Situational · Usage tracking

Strong answer

Checks job sizes, mix strength and equipment settings, talks with the lead and reports findings.

Red flags

Sends them more chemical.

Your supplier runs short of sodium hypochlorite in peak season. What do you do?

Situational · Stock-outs

Strong answer

Contacts backup suppliers, prioritizes stock for booked jobs, tells operations early and adjusts reorder points for next season.

Red flags

Waits for the supplier.

Tell me about a time you cut chemical or supply waste.

Behavioral · Process improvement

Strong answer

Explains the waste they found, the change such as measured mixing or better storage, and the measured savings.

Red flags

Has no measured result.

Tell me about a time you worked with field crews to solve a supply problem.

Behavioral · Cross-team work

Strong answer

Listened to the crew, found the real cause such as a bad truck kit or late orders, and fixed it together.

Red flags

Blamed the crews.

How do you keep weak or expired chemicals from going out on trucks?

Technical · Expired products

Strong answer

Dates containers on arrival, stores bleach cool and shaded because it weakens with heat and time, rotates first in, first out, checks strength where possible, and pulls old stock.

Red flags

Doesn't think chemicals expire.

Walk me through your estimate visit for a house wash with a driveway and gutters.

Technical · Site assessment

Strong answer

Measures, notes siding type and condition, mildew level, stories, landscaping, water access, oil and rust stains, gutter condition and anything fragile, and explains what's included.

Red flags

Looks from the street and quotes.

The customer asks you to promise their rust and oil stains will come out. What do you say?

Situational · Honest expectations

Strong answer

Explains that some stains may only lighten, offers a test area or treatment options, and doesn't promise.

Red flags

Promises they'll be gone.

A customer says a neighbor's kid with a pressure washer will do it for much less. What do you say?

Situational · Price objections

Strong answer

Respects their choice, explains the damage risks and what professional methods and insurance cover, and doesn't bash anyone.

Red flags

Drops the price to match.

Tell me about a sale you closed after the customer said no at first.

Behavioral · Closing

Strong answer

Found the real concern, such as damage risk or timing, answered it honestly, and the customer chose to book.

Red flags

Wore them down.

Tell me about an estimate that turned out wrong. What did you change?

Behavioral · Learning

Strong answer

Owns it, explains what they missed such as heavy mildew or roof pitch, and describes a new habit like a checklist or photos.

Red flags

Blames the crew.

A customer wants only their driveway cleaned, but the siding is green with mildew. How do you handle it?

Situational · Bundling

Strong answer

Points it out, explains the option and price, and respects the answer.

Red flags

Doesn't mention it, or pushes hard.

How do you decide which past customers to call this week, when house washes, roofs and decks come due on different schedules?

Technical · Annual reminders

Strong answer

Uses last service date and season, past services, open estimates, and do-not-contact flags, and calls when people tend to answer.

Red flags

Calls in list order.

A past house-wash customer is due again. Their notes show black streaks on the roof. How do you bring it up?

Situational · Cross-selling honestly

Strong answer

Mentions it as an observation from the crew, explains the option and price, and accepts a no.

Red flags

Pushes the roof cleaning hard.

Someone who got an estimate last spring says they decided to do it themselves with a rented pressure washer. What do you say?

Situational · Old estimates

Strong answer

Stays friendly, shares an honest tip about the damage risks of high pressure on siding or roofs, and offers to help in the future without pressure.

Red flags

Mocks the decision or pushes.

A customer asks you to stop texting them. What do you do?

Situational · Do-not-contact

Strong answer

Apologizes, marks them do-not-contact in all channels right away, and confirms.

Red flags

Switches to calling instead.

Tell me about a time follow-up won you business others had given up on.

Behavioral · Persistence

Strong answer

Explains the timing, what new reason or option they offered, and why the customer booked.

Red flags

Can't name one, or wore the customer down.

Tell me about a time you won back a customer who had switched to a competitor.

Behavioral · Winning back customers

Strong answer

Asked why they left without arguing, addressed that reason, made a fair offer, and the customer came back.

Red flags

Bad-mouthed the competitor or offered a deep discount right away.

Walk me through how you'd check a pressure washing rig before the first job of the day.

Technical · Morning rig check

Strong answer

Engine and pump oil, fuel, hoses for bulges or cuts, fittings and quick connects, nozzles or tips, the gun's trigger lock, chemical tanks labeled and secured, ladders and protective gear.

Red flags

Starts the engine and sees if it runs.

A high-pressure hose starts spraying from a fitting while the technician is working. What do you do?

Situational · High-pressure leak safety

Strong answer

Tells the tech to stop, never grabs or covers the leak with a hand because high-pressure water can inject into skin, shuts the machine off and relieves pressure before anyone touches it.

Red flags

Grabs the hose to hold the fitting together.

A neighbor and their kids walk over to watch while hoses run across the driveway. What do you do?

Situational · Bystander safety

Strong answer

Politely asks them to stay back, warns about hoses and spray, and lets the tech know so spraying pauses if needed.

Red flags

Keeps working and lets them stand close.

Tell me about a time at work, school or volunteering when you fixed or maintained a tool, engine or machine.

Behavioral · Mechanical aptitude

Strong answer

Explains what was wrong, how they figured it out, and what they did, with care for safety.

Red flags

Has no example, or forced something until it broke.

Tell me about a time at work, school or volunteering when you did the same hands-on task for hours. How did you keep the quality up?

Behavioral · Steady quality on long tasks

Strong answer

Gives a specific example and explains how they kept quality and safety up, such as checking their work or taking planned breaks.

Red flags

Admits they rushed or got careless near the end.

The technician asks you to top up the soft-wash tank, and you're not sure of the mix. What do you do?

Situational · Chemical mixing

Strong answer

Asks before guessing, follows the written mix sheet and label, wears goggles and gloves, and never adds a different chemical to the tank.

Red flags

Guesses, or pours in whatever chemical is nearby.

How do you approach cleaning an asphalt shingle roof with black streaks?

Technical · Roof cleaning

Strong answer

No pressure washing, which shingle makers and ARMA warn strips granules; uses a soft-wash mix at the right strength, works with fall protection or from the ground, protects plants and gutters from runoff, and explains results and timing honestly.

Red flags

Pressure washes the shingles.

What surfaces or conditions make you stop and call the office before washing?

Technical · Recognizing risky surfaces

Strong answer

Chalky or peeling paint, especially older paint that may contain lead, stucco or EIFS that can take on water, failing window seals, wood shakes, solar panels, and anything the crew hasn't been trained on.

Red flags

Washes everything the same way.

A new technician lets soft-wash mix dry on a customer's windows. What do you do?

Situational · Correcting mistakes on site

Strong answer

Rinses right away, checks for spotting, tells the customer if there's any damage, and coaches the tech to keep glass wet and rinse often.

Red flags

Ignores it because the windows aren't part of the job.

Runoff from a driveway cleaning is heading toward a storm drain at the curb. What do you do?

Situational · Runoff control

Strong answer

Stops, blocks or diverts the flow, recovers water where needed, and follows local storm drain rules.

Red flags

Keeps going because it's mostly water.

Tell me about a time you trained a new tech who was nervous about the equipment.

Behavioral · Training

Strong answer

Started with low-risk steps, explained the hazards, built confidence through practice, and checked skills before letting them work alone.

Red flags

Threw them in.

Tell me about a time you had to tell a customer that a surface, such as chalky siding or etched concrete, wasn't going to look new after cleaning.

Behavioral · Customer communication

Strong answer

Explained it before starting, showed a test spot, offered options such as a different service or a referral, and the customer wasn't surprised at the end.

Red flags

Waited until the end.

How do you decide between high pressure and soft washing for vinyl siding, an asphalt roof, a concrete driveway and a wood deck?

Technical · Choosing the method

Strong answer

Soft wash for siding and roofs, a surface cleaner for concrete to avoid striping and etching, low pressure with a wood cleaner for decks to avoid furring and gouging, and a test spot when unsure.

Red flags

High pressure on everything.

Before soft washing a house with flower beds around it, what do you do to protect the plants?

Technical · Protecting plants

Strong answer

Wets plants first, covers delicate ones, controls overspray and wind, uses the right mix strength, and rinses plants well afterward.

Red flags

Sprays around them and hopes.

Halfway through a house wash, you notice water getting behind a loose piece of siding near an outdoor outlet. What do you do?

Situational · Water intrusion

Strong answer

Stops spraying there, keeps water away from the outlet, tells the lead and customer, notes the loose siding and adjusts the spray angle.

Red flags

Keeps spraying to finish.

You're cleaning gutters on a two-story home, and the ground on one side is soft and sloped. What do you do?

Situational · Ladder safety

Strong answer

Checks overhead for power lines, uses a leveler and a stabilizer, gets a second person to foot the ladder, or uses a tool that reaches from the ground.

Red flags

Sets the ladder and climbs carefully.

Tell me about a time something you did at work caused damage, even small. How did you handle it?

Behavioral · Owning damage

Strong answer

Told their boss and the customer right away and helped fix it.

Red flags

Hid it, or has never made a mistake.

Tell me about a time you kept working safely when the job was running late.

Behavioral · Safety under pressure

Strong answer

Names the step they kept (plant pre-wetting, the trigger lock, goggles, ladder setup), how they told the lead or customer about the delay, and why it mattered.

Red flags

Skipped steps to catch up.