Paint Chalking Aluminum Siding

Primer does two important things.

Paint chalking aluminum siding. The key to painting aluminum siding is to get it. One of the most important aspects of a paint job is the prep work. Use of a low grade highly pigmented paint. Oil based paints tend to chalk more than latex formulations.

It doesn t take much effort to scrub away the debris once the tsp has loosened it up. Scrub off the chalk with a strong solution of water and spic and span or tsp detergent or a nonphosphate tsp alternative. The primer should be 100 percent acrylic and specifically manufactured for outdoor painting. Use of an interior paint for an outdoor application.

One of the hardest surfaces to prep is a aluminum or vinyl siding that is chalky. You can paint it. This primer will cover up the chalk and allow the new paint to bond with the aluminum siding. Some exterior paints such as those used on aluminum siding intentionally chalk for self cleaning.

Primer is one of the most important steps when painting aluminum siding. Steps for painting aluminum siding 1. Chalky surfaces will cause the paint not to adhere correctly to the surface and will cause premature peeling. Second primer creates a uniform surface that is ideal for paint adhesion.

Here s how to prepare the surface and choose your paint. This particular brush has a hole in the end for water to pass through. This oxidation that occurs on aluminum siding results in the build up of a chalk like substance on the siding itself which can easily be seen by wiping your hand across the aluminum. If your aluminum siding has developed a chalky residue or is faded stained or just plain the wrong color fear not.

In this video toh expert shares his tips and demonstrates how you clean and prepare the surface for painting. Wipe the surface with the palm of your hand. Factory finished siding can develop an excessively thick chalk layer and may require power washing to ensure complete chalk removal. This is called chalking and essentially is the existing paint breaking down from the weather.

If you need to paint aluminum siding choose a day when the weather is at least 50 f 10 c and dry since moisture from rain or dew will ruin a new paint job. If after two tries of hand scrubbing or power washing there is still chalk on the surface simply use a primer before repainting the aluminum siding. Rub siding with cloth to check for powdery paint pigment and mildew. Aluminum should be painted with a self etching primer designed for metal.

Not adequately sealing a porous surface. Then paint with two coats of acrylic paint. First it seals the aluminum to prevent the chalky oxidation from happening under your paint. A siding brush has soft bristles that won t scratch the paint or gouge the aluminum like other hard brushes.

Inspect the siding for mildew powdery paint pigment and mildew. If the paint color comes off on your hand the paint is chalking.