Siding That Gets Clean Without Damage

Soft Washing in Spokane for vinyl siding, painted surfaces, and delicate materials where high pressure causes harm

You see mold, mildew, and algae darkening your siding and roof, but applying 3000 PSI pressure to those surfaces will crack paint, warp vinyl, and force water into wall cavities where it rots framing and insulation. Soft washing uses biodegradable chemical solutions that dissolve organic growth at the root, followed by a low-pressure rinse that clears residue without the mechanical damage high-pressure equipment inflicts on delicate surfaces. Resto Exteriors applies this process throughout Spokane because moisture from winter snow and spring rain creates ideal conditions for mold and algae, especially on north-facing walls and shaded roof sections that never fully dry.


The chemical solution kills growth below the surface rather than simply blasting it off, which prevents rapid regrowth and extends the time between cleanings. Rinsing uses minimal pressure—just enough to clear dissolved material—so painted wood, composite siding, and asphalt shingles remain intact without chipping, gouging, or water intrusion.


Arrange an on-site evaluation to determine whether your siding and roof require soft washing or can handle standard pressure washing.

Why Soft Washing Works for Vulnerable Surfaces

The process treats the biological cause of discoloration—killing mold, mildew, and algae spores—rather than temporarily removing visible growth while leaving roots intact. This approach matters because high-pressure washing often spreads spores across the surface and drives them deeper into porous materials, accelerating regrowth after cleaning.


After soft washing, you will see original siding color return without streaks, water stains, or the uneven patches that result from aggressive pressure. Wood fences regain their natural tone, composite materials lose the green or black discoloration, and roof shingles appear uniform without the granule loss that shortens roof lifespan.


Soft washing is the correct method for any surface where pressure damage outweighs cleaning benefit—this includes all roof shingles, painted wood, vinyl siding with hollow backing, and stained or sealed wood. The service does not replace pressure washing for concrete or asphalt; it addresses the materials where high pressure is simply the wrong tool.

Common Questions About This Service

Homeowners in Spokane often ask about soft washing because they have seen damage from high-pressure cleaning or need to understand the difference between the two methods.

  • What is the difference between soft washing and pressure washing?

    Soft washing uses chemical solutions at low pressure to kill organic growth, while pressure washing uses high-pressure water to physically remove dirt and buildup; the choice depends on material sensitivity and the type of staining present.

  • How long do soft washing results last?

    Chemical treatment kills growth at the root, so results typically last 18 to 24 months before mold and algae return; this is significantly longer than pressure washing alone, which only removes visible growth without addressing spores.

  • Will soft washing damage my landscaping?

    Resto Exteriors pre-treats and waters down plants, mulch, and grass before applying any chemical solution, and uses biodegradable formulas that break down quickly; this prevents the plant damage and soil contamination that occur when operators skip pre-treatment steps.

  • Can soft washing remove wildfire ash from siding?

    Yes, the chemical solution loosens ash bonding so the low-pressure rinse clears it without forcing water behind siding or stripping paint; this is especially important in Spokane where ash accumulation after fire season creates acidic staining that damages finishes if left untreated.

  • When should I choose soft washing instead of pressure washing?

    Any time the surface is painted, stained, vinyl, composite, or asphalt shingles; high pressure damages these materials permanently, while soft washing cleans them safely and extends their lifespan.

Resto Exteriors educates every customer about the right cleaning method for each surface, because applying the wrong technique causes costly damage that cleaning should prevent. Schedule a free estimate to learn whether soft washing is the appropriate choice for your home's exterior.