Scrub, then patch. Dirt, mildew, and chalky old paint prevent fresh paint from adhering properly. If your house was built before 1978, there might be lead paint below the surface. (See CR’s step-by-step guide for using a test kit to check for lead paint.) In that case, you’ll need to use a certified lead-abatement contractor to prep the surface. Otherwise, scrub the surface with a wire brush or scrub pad, or very carefully with a pressure washer, and clean with a detergent such as Red Devil TSP. House Painting Thornton
Whether you decide to do the preparation work yourself or have a professional do it as part of your project, proper preparation makes all the difference in creating a smooth and lasting finish. Do it correctly the first time or you’ll quickly end up spending more to fix peeling and chipping paint. Follow this process before starting on your home's exterior. Keep in mind that the process may vary based on your siding materials: Thornton House Painters
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