FAQ

FREQUENTLY ASKED QUESTIONS

Common questions about power washing, soft washing, and exterior cleaning in Nassau County, NY.

How is power washing priced?

Pricing depends on the square footage being cleaned, the surface material—vinyl siding, asphalt shingles, concrete, pavers, and wood each need different methods—and how much organic growth, staining, or grime has built up. A lightly soiled walkway and a north-facing wall under heavy tree canopy in Nassau County are not the same job. We provide free quotes after reviewing photos or the property, typically within 24 hours.

What's the difference between power washing and pressure washing?

In industry use, power washing usually means pressurized water that may be heated, while pressure washing relies on high-pressure cold water. Homeowners and contractors often use the terms interchangeably for exterior cleaning. What matters on a Long Island home is matching technique to the surface—soft washing for delicate materials, controlled pressure for dense concrete and stone.

How long does washing an average house take?

Most single-family homes take a few hours on-site; larger properties vary depending on square footage, stories, and how many surfaces are included. Shade, tree cover, and the amount of buildup on siding or roof also affect time on the job. We walk through scope during the quote so timing aligns with your property.

What's the best time of year to power wash on Long Island?

Spring and fall are most popular; washing works year-round when temperatures stay above freezing. Spring clears pollen and winter film from siding and driveways, while fall removes algae before leaves peak on North Shore lots. We schedule around weather and drying conditions so rinsed surfaces cure properly.

When should you NOT pressure wash a surface?

Do not use high pressure on roofs, cedar shingles or shakes, older or brittle siding, and painted wood—these need soft washing with low pressure and purpose-built detergents instead. Aggressive fan tips can strip granules, scar wood grain, force water behind trim, and damage coatings on Nassau County homes. Match the method to the material every time.

What's included in a full exterior deep clean?

A full exterior deep clean typically covers house washing for siding and trim, roof soft washing to remove algae and black streaks, and flatwork such as driveways, walkways, and patios. Decks, fences, and pool surrounds can be added when they are part of your scope. Every job is quoted line by line so you see what is included before work begins.

What cleans concrete driveways best?

Concrete driveways respond best to a surface cleaner—a wide, rotating head that applies even pressure across the slab—paired with appropriate PSI and pretreatment for oil, rust, and organic film. Consumer rental machines often leave tiger stripes, etch weak spots, or lack the flow rate to flush debris after winter salt and pollen season on Long Island. Professional equipment and trained technique deliver uniform results without gouging the surface.

Is power washing safe for roofs?

Never use high pressure on asphalt or architectural shingles—it strips protective granules and can void manufacturer warranties. Roofs should always be soft washed: low-pressure application of roof-safe detergents that kill algae and moss, followed by a gentle rinse. That approach removes black streaks common across Nassau County without damaging the shingle system underneath.

What is the difference between soft washing and pressure washing?

Soft washing uses detergents and low pressure to kill algae and mildew on roofs, siding, and painted surfaces. Pressure washing applies higher mechanical force and is better suited to dense concrete and some stone when done with correct fan tips. We choose the method that protects your materials while still removing buildup.

Do you serve all of Nassau County, NY?

We serve homeowners and businesses throughout Nassau County, including Syosset, Garden City, Great Neck, Hicksville, Massapequa, Levittown, and dozens of additional towns. See our town pages or call to confirm coverage for your address.

Are you licensed and insured?

Power Wash Unlimited is fully licensed and insured in New York. We carry liability coverage appropriate for residential and commercial exterior work and can provide a certificate upon request.

What hours are you open?

We answer phones and schedule jobs seven days a week, Monday through Sunday, from 8AM to 7PM. Production dates may vary by season and crew availability.

Will power washing damage my plants?

We pre-wet sensitive plantings, shield where needed, and rinse thoroughly. Soft wash detergents are applied with control, and we adjust dwell times for windy days common on Long Island so overspray stays predictable.

How often should I wash my house in Nassau County?

Many clients schedule house washing every 12–24 months depending on shade, tree cover, and proximity to roads or salt air. North-facing walls and humid microclimates often need attention sooner than sunny exposures.

Can you remove oil stains from my driveway?

Oil and rust often improve significantly with pretreatment and surface cleaning, though very old stains may lighten rather than disappear completely. We set expectations during the quote and test small areas when helpful.

Should I paint before or after power washing?

Exterior paint should almost always follow a professional wash so chalk, mildew, and film do not get sealed under new coatings. Your painter may specify a waiting period after washing before primer—ask us to coordinate timing.

Do you offer commercial power washing?

Yes. We clean storefronts, sidewalks, dumpster pads, and building facades for Nassau County retailers, offices, and property managers, often with flexible scheduling before opening hours.

Still have questions? Contact us or call (516) 590-6709.