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topic 10815

Heat dissipation and protection of a galvanized roof


My house have a galvanized roof and I would like to:

1-Paint it with a paint that can help dissipate the heat.

2-Paint last longer.

3-Know the best way to paint it, due to is a waive form surface.

Ismael Latorre
- Mayaguez, Puerto Rico

Latex Self-Etching Primer

June 1, 2009

Hi, Ismael. There are ceramic paints and white paints which can reduce the thermal load. However, getting good adhesion to galvanized metal is usually an issue. I would suggest scrubbing the roof with a brush and trisodium phosphate [linked by editor to product info at Amazon], then wiping with vinegar, then applying a Galvanized Metal Primer [linked by editor to product info at Amazon] before applying any top coat. Good luck.


Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

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