The most important steps in exterior house painting includes surface prep and quality paint. Preparing the surface prior to painting your home will make or break your paint job. It is rarely the paint film itself that fails but rather the adhesion of the paint to the surface below (often called "substrate" in painting lingo). The reason paint fails to adhere is because the surface to which it was applied, was wet or was loose itself. So making sure your paint surface is dry and free from dirt, grease, oils and flaking or loose paint, will give your paint and primer a good surface from which to bond.
Painting the exterior of your house over wet or poorly prepared surface is like building a house on a bad foundation, and that's never been a good idea.
Even though every painting company recommends power washing your exterior before painting, 3000 - 4000 psi is not always good for your homes structure. This kind of pressure will leave the inner side of siding and inner structure walls, with moisture that will need to evaporate eventually. This can and will make exterior paint blister, bring water damage to the interior walls and take away from the lasting ability, of your new paint job.
Unless your exterior surfaces shows dirt and chaulking, most likely your exterior can be rinsed with the garden hose and wet rags to remove minor debris (like spider webs) and such.
Your garden hose will have about 35 - 65psi and will not overly damage your home.
Painting the exterior of your house over wet or poorly prepared surface is like building a house on a bad foundation, and that's never been a good idea.
Even though every painting company recommends power washing your exterior before painting, 3000 - 4000 psi is not always good for your homes structure. This kind of pressure will leave the inner side of siding and inner structure walls, with moisture that will need to evaporate eventually. This can and will make exterior paint blister, bring water damage to the interior walls and take away from the lasting ability, of your new paint job.
Unless your exterior surfaces shows dirt and chaulking, most likely your exterior can be rinsed with the garden hose and wet rags to remove minor debris (like spider webs) and such.
Your garden hose will have about 35 - 65psi and will not overly damage your home.
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