How To Clean Exterior Wood Before Painting

To get a deeper clean on molded exterior surfaces youll need a more powerful cleaning solution.
How to clean exterior wood before painting. Apply with a garden type sprayer regular spray bottle or sponge. Scrub at the wooden surface to kill and remove mold and mildew. Since you will be repainting removing mold with a heavy-duty cleaner such as trisodium phosphate and bleach is appropriate.
Use a cleaner specifically designed for cleaning siding and always check the label to make sure its safe for wood. There are several ways to accomplish this. In order to get a smooth paint finish you have to make sure that you remove the oils dirt and grease that has become lodged on the surface of the door.
Work down from the roofline taking on one. Power wash the exterior to remove sanding dust paint flakes dirt and mildew. According to experts the easiest method for cleaning exterior surfaces is pressure washing.
Then use a vacuum or blower to get rid of dust from tricky spots. As such you should wipe the old wood surface with a mixture of 1 cup bleach 1 cup trisodium phosphate TSP and 2 gallons water. Mix a second solution of half water and half bleach and apply it to the surfaces.
Remove any remaining mildew by applying a cleaning solution of 1 part. Soak a sponge or scrub brush in the cleaning solution. Then remove the sanding dust and apply a suitable primer.
Less likely to damage trim even more scraping or wire brushing old paint when wood has dried back out. Power washing is one way to clean a homes exterior. Use a spray bottle to squirt cleaner onto the grimier spots and scrub with a soft brush.