How Do You Choose a Good Exterior Cleaning Contractor?

What you are really buying when you hire an exterior cleaner

Exterior cleaning looks simple from the street: someone arrives with hoses, sprays a wall, and leaves. The difference between good and bad work shows up later. Siding can streak, windows can leak into frames, a deck can end up scarred, and a roof can lose granules. The labor is the smaller part of the value. The judgment about method, pressure, chemistry and sequence is the larger part.

That judgment is hard to see in an ad or a coupon. It shows in how a contractor talks about your house. Someone who asks what the siding is made of, how old the roof is, whether you are on a well and where your downspouts drain is doing the thinking that prevents damage. Someone who quotes a flat number for a house they have not seen is guessing, and guessing in this trade is usually paid for by the homeowner.

So the first question to ask yourself is not who is cheapest. It is who seems to understand the work. The rest of this guide gives you ways to test that without becoming an expert.

Ten questions worth asking before you hire anyone

Good contractors are used to questions, and the way they answer matters as much as the content. You are listening for clear, plain explanations and a willingness to say what they do not know. Write the answers down, because comparing three quotes a week later is hard to do from memory.

• Who will be at my house, and are subcontractors ever used?
• What method will you use on each surface, and why?
• What pressure will you use on my roof, siding and windows?
• Do you carry liability insurance, and can you send proof?
• Do you hold any trade registrations or licenses required where I live?
• Can you give me references or examples of similar work I can check?
• What happens if something is damaged during the job?
• What will you not clean, and what problems might cleaning reveal?
• How do you protect plants, landscaping and the lower walls of the house?
• What is included in the price, and what would change it?

Insurance, licensing and references: what to ask and how to read the answer

Requirements differ by city and township, and what a contractor needs depends on the work. Rather than assume, ask each contractor what applies to them and request proof. A contractor who carries liability coverage can usually send a certificate from their insurance agent, which names the policy and the coverage period. You can call the agent to confirm it is current. A contractor who is unwilling to discuss it is telling you something.

References deserve the same treatment. Ask for a couple of recent customers you can call, or ask to see photos of similar work in your area. Online reviews help, but read the specific ones. Look for reviews that describe the process, the communication and how problems were handled, not just praise. A cluster of reviews from the same week is worth a second look.

Be careful about what you infer from a business that has no website, or a polished website with no address. Neither is proof of anything. What you want is consistency: a real phone number, a real name, a local base, and answers that match from one conversation to the next. Rob's Exterior Services is based in Woodstock, owned by Robert Morales, and works without subcontractors, so when you text, you are dealing with the person who will do the job. Ask Rob the same questions you would ask anyone else.

Method matters: how to spot unsafe cleaning proposals

The single biggest source of damage in this trade is the wrong pressure. High-pressure water can strip granules from asphalt shingles, gouge soft wood, force water behind siding and into window frames, and wear away mortar. Roofing manufacturers generally steer homeowners toward gentle cleaning for asphalt shingles and caution against high-pressure washing. If a contractor proposes to blast your roof clean, treat that as a serious red flag.

A sound approach for roofs, siding and most painted or stained surfaces is a cleaning solution put on gently, a short dwell time, and a soft rinse. Hard surfaces like concrete take more pressure but still need care. The Soft Washing vs Pressure Washing: Which Does Your Surface Need? guide covers which surfaces take which method, and Is Roof Washing Safe for Asphalt Shingles? focuses on roofs.

Ask also about runoff and plants. A contractor who wets down landscaping before and after, keeps solutions diluted and rinses thoroughly is protecting your yard. One who says that is not a concern probably has not thought about it. The Soft-Wash Cleaning Solutions: Plants, Pets and Storm Drains guide explains what a good answer sounds like.

What a fair quote looks like

A fair quote is specific. It lists the services, names the surfaces or areas, states the price, and notes what is not included. It should arrive in a form you can keep, such as an email or text. If the contractor has not seen the house, either in person or through photos, expect the quote to come with a caveat, because dirty is a spectrum and heights, access and surface condition affect time and risk.

Prices vary for reasons that are legitimate: house size and height, number of stories, roof pitch, type of siding, how stained the surface is, and how hard access is. The What Affects the Cost of Exterior Cleaning? guide lists the drivers. Rob's gutter cleaning starts from $100 and most of his other work is quoted after he sees the house. House washing and driveway and patio jobs, for example, get a number once he has a photo.

Be cautious of two extremes. A very low quote can mean a skipped step, an inexperienced crew or a plan to upsell on the day. A very high quote can mean padding or a contractor who is busy and not really interested in the job. The sweet spot is usually a quote near the middle that comes with a clear explanation. If you get three, ask the two outliers why they differ.

Red flags and green flags at a glance

Patterns repeat. Contractors who go door to door with an on-the-spot price that disappears, who will not put anything in writing, who ask for the full payment before starting, or who cannot say where they are based are risky regardless of the price. So are those who dismiss concerns about damage. On the other side, contractors who explain trade-offs, tell you when to wait, and suggest a repair or a different trade when appropriate tend to be the ones you will call again.

• Red flag: quote given without seeing or asking about the house
• Red flag: pressure to sign today or a deal that expires at the door
• Red flag: proposes a hard blast on shingles or old wood
• Red flag: vague about who does the work or where they are based
• Green flag: asks about siding type, roof age, well water and landscaping
• Green flag: says plainly what cleaning cannot fix
• Green flag: gives a written or texted quote with exclusions
• Green flag: willing to start with the smaller job and see how it goes

Smaller choices that still matter

Scheduling is one. A contractor who gives realistic dates and says when weather may push them is more reliable than one who promises an exact day months in advance. Communication is another: text or call replies that are clear and consistent tell you how the job will go. Cleanup is a third. A good crew leaves the property tidy, picks up debris, and coils hoses without being asked.

Consider also whether you want a single service or a package. Bundling a wash, a gutter clean and windows can save a trip and often makes sense, and curb appeal packages are quoted that way. But do not buy more than you need just to bundle. Start with the problem that bothers you most, whether that is house washing, gutter cleaning or window cleaning, and add from there.

Finally, read the work after it is done. Walk the house with the contractor, point at anything you dislike, and raise it that day. A contractor who handles that conversation well is the one to keep.

If you only remember five things

Ask who does the work. Ask what pressure and method they will use on each surface. Ask for proof of insurance and for references. Get a written or texted quote that names inclusions and exclusions. And trust the contractor who tells you when to wait or when to call someone else over the one who says yes to everything.

If you are in McHenry County or nearby, you are welcome to send Rob a photo and ask him all of the above. Rob is a Woodstock family man with four daughters, and he would rather answer your questions before the job than after.