Power Washing

the guide

Pressure is not always the answer

Concrete tolerates high pressure. Siding, wood and roofs do not: they are cleaned by “soft washing”, a low-pressure application of cleaning solution followed by a gentle rinse. The Asphalt Roofing Manufacturers Association advises against pressure washing shingles.

What affects the price

Surface area and height, how heavily soiled the surfaces are, the method required, and access to water.

Before the crew arrives

Close windows, move furniture and vehicles, point out any loose siding or failing paint, and ask how plants will be protected.

Rules and paperwork in Pennsylvania

• Pennsylvania’s Home Improvement Consumer Protection Act requires most contractors who perform home improvements to register with the Attorney General’s office and to give you a written contract for any job over $500. The registration number belongs on the estimate and the contract — ask for it.

Sources: Pennsylvania Office of Attorney General — Home Improvement Consumer Protection Act. Rules change — confirm current requirements with the agency and with your municipality.

Questions to ask before you hire

1. Which surfaces will be soft washed rather than pressure washed?
2. How do you protect plants and outdoor outlets?
3. Are you insured for property damage?
4. What is your Pennsylvania Home Improvement Contractor registration number?

Frequently asked questions