Can Power Washing Damage Vinyl Siding? 3 Critical Mistakes
Can power washing damage vinyl siding? Yes. Extruded residential vinyl siding can easily warp, crack, or puncture when exposed to pressure exceeding 1,500 PSI. To prevent permanent structural damage, water-wrap mold intrusion, or voiding your manufacturer’s warranty, you must restrict washing to a maximum limit of 1,200 PSI, maintain a 12-to-18-inch distance, and use a wide-angle 40-degree white fan tip combined with a specialized, low-pressure chemical surfactant. (Use our dynamic siding age and temperature calculator below to find your property’s exact shatter threshold).