What PSI is recommended for power washing a house?

What PSI is recommended for power washing a house?

Most professionals recommend staying in the 1,500–2,000 PSI range for house exteriors, particularly for vinyl siding, painted wood, and stucco, all of which are more delicate than homeowners often assume. This range provides enough force to remove dirt, pollen, and light algae without forcing water behind siding panels or stripping the surface finish. For roofs specifically, pressure washing isn’t recommended at all — professionals use soft washing instead, a low-pressure chemical method that avoids stripping protective shingle granules. Brick and other masonry exteriors can generally tolerate higher pressure, up to 2,500–3,000 PSI, since the material itself is far more durable than siding. As a general rule, the more delicate or painted the surface, the lower the recommended PSI, with 1,500–2,000 covering the safe range for most residential exteriors.