Painting Roof White Make The Attic Cooler

Painting roofs white has been like changing lightbulbs one of the well cited easy ways out of climate change.

Painting roof white make the attic cooler.

But its potential value in ameliorating the most severe consequences of excess heat in cities could be life saving. By reflecting more light and heat back to the atmosphere a white roof should act like. Lo mit is a silver colored non thickness dependent low emissivity radiant barrier paint interior radiation control coating system irccs which may be used in almost any application where infrared heat reflectivity. 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. 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. How to cool your roof. The easiest route is to slap a cool roof coating onto an existing roof.

That equates to a 16 7 reduction on the heat load being transferred from the the roof system into the attic. Reduced heat load equates to reduced energy required to cool or heat a building. 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. 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.

It found that a clean white roof that reflects 80 of sunlight will stay about 31c cooler on a summer afternoon.