You can easily upgrade your curb appeal with a fresh coat of paint on your home's exterior. Use this helpful how-to guide to learn about priming the outside of your home, application techniques and problem-solving.
Paint on homes built before 1978 may contain lead. Check with your local health department or the Environmental Protection Agency if you have questions or concerns.
A clean surface is essential for a good paint job. A pressure washer with the proper detergent is the most efficient means of thoroughly cleaning exterior siding. Use caution when selecting the nozzle - a concentrated stream can damage wood, seep under lapped siding and break windows. On surfaces that aren't suffering from excessive peeling or flaking, a regular garden hose and scrub brush will work. Trisodium phosphate (TSP) is a good, safe cleaning agent. To remove and prevent mildew, use a detergent with mildewcide or a mixture of one quart household bleach in three quarts of water. Follow package instructions for any cleaning product you use. Rinse the surface when cleaning is completed.
Use eye protection when pressure washing. Choose the proper paint applicators and exercise caution when using a ladder.
Scrape away loose paint. Using a wire brush, scrape paint that's flaking or located in areas that the washer didn't reach. Scraping to the bare wood is not necessary if the old paint is intact. It can be painted over after sanding.
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Repair any surface flaws with a surface repair compound rated for exterior use. Sand the surface when dry.
Remove old caulk. Re-caulk around door trim, windowsills and other areas that need to be sealed with a paintable exterior caulk.
Repair and re-putty windows. Remove old putty and apply new glazing. Make sure it's dry before painting.
Use drop cloths to protect bushes, flowerbeds, decks, lawns and sidewalks. Gently tie up and cover shrubs to prevent them from rubbing against fresh paint.
Prime bare wood and any area where repairs have been made.
A primer will help paint adhere to the surface, providing a more uniform appearance. Use a primer when painting over new wood, bare wood, or repainting over existing bright or dark colors.
Sunlight and UV radiation. Sunlight and moisture can cause chalking and tint loss; however, latex paint tends to resist the effects of direct sunlight better than oil-based or alkyd paints.
Water and moisture. Wood expands and contracts due to changing moisture levels and can cause paint to crack and flake under this stress. Permeable or breathable latex paint allows water to vaporize and escape before damage can occur. Moisture can cause blistering, which leads to mildew growth. Paint additives keep mildew from forming but will not kill existing mildew.
Change in temperature. Superior adhesion and flexibility in paint helps prevent cracking and flaking caused by the expanding and/or contracting of the substrate (wood, plywood, or hardboard). Top quality acrylic latex paint is an excellent choice for areas with freeze/thaw cycles.
Aluminum and vinyl siding present special challenges when painted. Aluminum siding frequently suffers from excessive chalking and may contain dents and imperfections. Pressure wash or hand-scrub to remove chalk and rinse afterwards. Satin or low luster paint is the best choice for aluminum siding because it hides dents and makes the imperfections less noticeable. A spray application gives the best appearance. Vinyl siding has the same problems with one additional limitation. Vinyl siding has a tendency to buckle or warp irreversibly from hot, direct sunlight. Darker colors will absorb more heat, so select a paint color no darker than the original color of the original vinyl.