No. Although our machines generate very high pressure and we do use a light chlorine mix, roof tile and paint should not be affected by cleaning.The short duration of pressure and chemical contact is as large a factor in the weathering of roof tile and paint as compared to 365 days of Florida sun and rain; pressure-washing may actually extend the life of surfaces by removing mildew and other parasitic organism that eat into them.

Most furniture manufactured for out-door use, exterior paint, stains, and varnishes are made to withstand this light chlorine mix.