If you have a light roof your home absorbs less heat through the roof during summertime.
How to make roof absurb less heat.
White is the most reflective color and white metal roofing can actually lower the ambient temperature in the home by reflecting more of the sun s rays into the environment.
One is to replace the surface layer with white gravel or reflective marble chips to increase its solar reflectance.
Awell insulated house will gain only 1 f 0 6 c per hour if the outside temperature is 85 to 90 f 29 to 32 c.
Still the shine of bright white on a roof is imposing and can take away from the overall aesthetic of the house.
As a result your air conditioner operates more efficiently uses less energy and leads to lower utility bills.
In most cases a cool roof will stay at least 50 f cooler than a non cool roof of the same color and construction.
Light colors such as off white light yellow and light gray do not reflect as much heat as white but they reflect enough to lower the ambient temperature to a lesser extent.
Even the dark metal colors retain less heat than the relatively light shingles.
Some roofing materials come in cool roof options and others can be altered with a highly reflective type of paint or coating to absorb less heat.
Just as wearing light colored clothing can help keep you cool on a sunny day cool roofs material that is designed to reflect more sunlight and absorb less heat than a standard roof.
Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.
I can tell you that my experience is that any metal roof is cooler than asphalt shingles.
The best way to beat the heat is to not absorb it in the first place.
Use light color metal roof with overhangs to shade the walls on the south and west sides.