What color roof reflects the most heat?
In general, lighter-colored roofs reflect away heat rays from the sun, but dark-colored roofs absorb much of that heat and transfer it into the rooms below..
Does a white roof keep your house cooler?
A white roof can emit up to 90% of absorbed heat, maintaining a stable, cooler temperature inside your house. This increases energy efficiency, reduces utility bills, and extends the life of your roof.
What if all roofs were white?
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.
How much heat does white reflect?
According to Lawrence Berkeley Laboratories, white-coated roofs can reflect 60 to 85 percent of the solar energy that hits them and stay as little as nine degrees above air temperature.
What color roof is the coolest?
Since dark surfaces are better heat absorbers, traditional cool roofs are white. Berkeley Lab research has demonstrated that raising the solar reflectance of a roof from about 20 percent (dark gray) to about 55 percent (weathered white) can reduce cooling energy use by 20 percent.
Which roof is best for hot climate?
Better options for homeowners in warm climates are metal, slate, clay, or rubber shingles.Begin Your Roof Replacement.Metal roofs excel under extreme temperatures. … Slate roofing is made of stone, it is impervious to weather, sun, heat, and cold.More items…