Why Does Paint Get Chalky On Aluminum Siding

Chalky surfaces will cause the paint not to adhere correctly to the surface and will cause premature peeling.

Why does paint get chalky on aluminum siding.

The primer should be 100 percent acrylic and specifically manufactured for outdoor painting. This phenomenon is known as chalking. Paint that chalks is much less troublesome than paint that peels. Before repainting an area with chalking paint it is necessary to remove all the chalk along with any dirt and dust on the paint surface.

There are several steps in dealing with a chalky surface to ensure a long lasting paint. When paint on outdoor surfaces ages it develops a light but noticeable buildup of powder. A dull chalky paint finish comes off when touched and makes a home s exterior paint job look dated. This primer will cover up the chalk and allow the new paint to bond with the aluminum siding.

This is called chalking and essentially is the existing paint breaking down from the weather. This is a natural process. One of the most important aspects of a paint job is the prep work. Why does chalking happen and what can you do about it.

If chalky paint is not removed it can eventually cause damage or discoloration to surrounding parts of the house. 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.