By Patriot Home Service. Published: . Updated: . Published by Patriot Home Service.
Understand how pressure, chemicals and water direction can affect siding, masonry, decking and other exterior materials.
Understand how pressure, chemicals and water direction can affect siding, masonry, decking and other exterior materials.
Painted wood, coated metal, composite decking, brick and vinyl do not share one cleaning method. Age, damage and existing coatings also matter. Find the manufacturer's care instructions where available, then test an inconspicuous area. A dark stain may be dirt or biological growth, but cleaning alone does not explain why the surface stays wet.
A forceful spray can strip finishes, erode joints or push water behind cladding. Upward spraying into laps and vents is particularly problematic. Higher pressure is not automatically more effective or safer. Use only an approved method and keep water away from electrical equipment, damaged seals and areas where the assembly cannot manage it.
Use dilution, ventilation, protective equipment and disposal practices on the product label. Never mix cleaners, including bleach with ammonia or acids. Protect nearby materials and landscaping as directed, and avoid sending contaminated runoff into drains where prohibited. If staining quickly returns, consider moisture and shade conditions rather than repeatedly increasing chemical strength.
Avoid roof access and unsafe ladders. Pressure equipment can injure skin, and chemicals can create serious hazards. Suspect hazardous coatings require evaluation before disturbance.
These references provide supporting guidance and further reading. Follow current local requirements and the instructions for your exact products; some publications address particular materials, products or code editions.
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