Painting Roof White Make The Attic Cooler

How to cool your roof.

Painting roof white make the attic cooler.

Having a silver roof shouldn t actually contribute to increased heat but a white roof will actually reflect the sun better and help the attic space be a little cooler. The easiest route is to slap a cool roof coating onto an existing roof. By reflecting more light and heat back to the atmosphere a white roof should act like. By decreasing the solar gain and heat retention of your home a white roof also increases its comfort and reduces the heat island effect to which your home s dark roof contributes.

The conditions would of course be very different in california to those found in. But there are problems with this approach mainly finding a paint that will adhere to the asphalt shingles and last for more than a few years. Oleson found that even if every city building roof and stretch of urban pavement in the world were painted white it would only delay global warming by 11 years. It found that a clean white roof that reflects 80 of sunlight will stay about 31c cooler on a summer afternoon.

Painting your asphalt shingle roof white can indeed make your roof surface 45 80 f cooler under the hot texas sun and this should easily cut your cooling bills by 10 15. But its potential value in ameliorating the most severe consequences of excess heat in cities could be life saving. Reduced heat load equates to reduced energy required to cool or heat a building. Lo mit attic heat barrier is a coating specially formulated to reduce summer radiant heat gain from the roof into the attic.

That equates to a 16 7 reduction on the heat load being transferred from the the roof system into the attic.