Power washing — at the right pressure, every time.
Pre-paint exterior wash, deck cleaning, driveway and concrete wash, fence prep, and siding refresh. Soft wash for delicate surfaces, higher PSI for hardscape — calibrated for what you're cleaning, not what's fastest.
Pressure that cleans without ruining the surface.
Most power washing damage we see in Denver isn't from dirty equipment or bad chemistry — it's from a homeowner or unqualified contractor using 3,000 PSI on cedar siding. Wood fibers blow apart. Vinyl gets perforated. Mortar washes out from between bricks. Paint blasts off in chunks. The clean is fast, but the surface is permanently damaged.
GT502's power washing is calibrated to the substrate. Soft wash (under 1,000 PSI plus a cleaning solution) for siding, stucco, and most painted surfaces. Medium pressure (1,500–2,500 PSI) for fences and decks before stain. High pressure (2,500–3,500 PSI) only for concrete, brick, and stone. We adjust spray distance, nozzle angle, and chemistry to do the job without leaving marks.
What we power wash
- Pre-paint exterior wash — required before any exterior repaint
- House siding — wood, fiber cement, vinyl, brick
- Stucco walls and exterior plaster
- Decks and deck railings — pre-stain prep
- Wood and chain-link fences
- Concrete driveways, sidewalks, patios
- Brick walkways and stone patios
- Garage floors and concrete pads
- Roof soft-wash (low pressure, anti-fungal solution)
- Gutter and downspout exteriors
Why pre-paint power washing matters
Every exterior repaint we do starts with a power wash — not optional, included in the quote. Paint won't bond to a dusty, mildewed, or chalky surface. We wash, let the substrate dry fully (usually overnight), then start prep. Skip this step and the paint may look fine for six months but will start peeling by year two. Done right, the wash adds 24 hours to the project but extends the life of the paint job by years.
The right pressure for the surface.
Power washing is one tool, but it's used at six different intensity levels depending on what you're cleaning. Here's how we calibrate.
Soft wash with cleaning solution to break down dirt and mildew. Wide fan nozzle, 18+ inches from the surface, slow passes. Never aim up — water gets under the lap.
Low-pressure rinse with mild detergent. Stucco surfaces look porous but the inner skim coat is fragile — too much pressure pits the surface and exposes the substrate underneath.
Medium pressure to lift weathered wood fibers and prep for stain. Always wash with the grain, never against. After wash, sand any raised grain before stain.
Higher pressure tolerable here. Surface cleaner attachment for big surfaces gives consistent results. We pretreat oil stains with degreaser before the wash for visible improvement.
High pressure on the face, low pressure near mortar lines. Old mortar can wash out under aggressive blast — we work in controlled passes and check the joints regularly.
Very low pressure with anti-algae solution. We apply, dwell, rinse — never blast a roof at high pressure. Damages shingles, lifts edges, voids manufacturer warranty.
Power washing, answered.
Standard house exterior is 2–4 hours depending on size and dirt level. Driveway is 1–2 hours. Full property (house + driveway + walkways) is half a day. Commercial buildings are quoted by sq ft and typically scheduled overnight or on weekends.
Not when done right. We use soft-wash pressure (under 1,200 PSI) on painted siding and adjust nozzle distance to prevent paint lifting. If your paint is already failing — peeling, blistering, chalking heavily — power washing will accelerate the failure and reveal what's underneath, but it won't cause new damage to sound paint.
Either works, but a few days after rain is ideal. The substrate is past initial wetness but not bone-dry, so detergents penetrate more evenly. We won't power wash during active rain, in freezing temperatures, or in high winds (overspray becomes uncontrollable).
Exterior windows get rinsed during the house wash, but we don't do detailed window cleaning (squeegee, tracks, frames detailed) as part of the power wash service. We can refer you to a Denver window cleaning specialist if you want both done back-to-back.
Yes — when it's actually soft wash. The danger is contractors using high-pressure power washers on roofs, which damages shingles. Real soft-wash uses under 500 PSI and a sodium hypochlorite solution that kills algae without blasting the roof. We follow ARMA (Asphalt Roofing Manufacturers Association) guidelines on every roof job.
We hook up to your hose bib by default. Standard residential water service is more than enough for residential power washing. For commercial buildings or jobs without water access on-site, we bring a tank truck — quoted separately as needed.
Power wash done without the damage.
Calibrated pressure for every surface. Soft wash for siding. High pressure for concrete. Free quote in 24 hours.