Light or Dark Roofing in Direct Sun – Which Is Better?
Because a roof is the primary barrier between the sun and the interior of a house, it’s reasonable to wonder how different styles and colors of roofing affect the amount of heat that is absorbed into the home. Here are some points to consider.
The color of the roof
It’s generally understood that dark colors absorb more heat than light colors. We experience this with our clothing and cars. That being said, there are other factors involved in how much sun-heat your home gets. One of them is the material your roof is made from.
Thick vs. thin roofs
Thicker roofing material naturally will absorb more of the sun’s heat than roofing material that is thinner. As the sun moves across the sky, a thick roof made of asphalt shingles or clay tiles keeps pulling heat into it. During particularly hot days, these roofs soak up quite a bit of heat and tend to serve as a warming blanket over your home.
Metal roofing is comparatively thin and even if uncoated/untreated will absorb and hold much less external heat. This principle is seen in ceramic space heaters, small units whose thick ceramic casing absorbs heat and uses it to heat the space. Imagine the effectiveness of a little heater with a thin aluminum casing instead of heavy ceramic. It wouldn’t hold very much heat.
Length of time retaining heat
Another factor beyond roof color when looking at heat levels in a home is how long it takes a roof to release its stored heat after the sun goes down. Thick roofing materials can take many hours to finally cool off after a blistering-hot day, and until they’re cool, the heat in them is still heating the home.
As noted above, metal roofing is a thinner roof material. Even if it did absorb a lot of heat (which specialized coatings keep from happening), it would lose the heat a lot faster and wouldn’t act as an above-house heater.
Reflection vs. absorption
Modern metal roofing often is coated with special finishes that actually reflect the heat from the sun’s rays away from it. Even darker-colored metal roofs will allow less heat to penetrate and get into the home than the lightest-colored standard shingles and tiles.
It’s not uncommon for homeowners during the first summer after having a metal roof installed to experience lowered cooling bills that result from not having to run their AC systems as much to maintain a comfortable environment.
It’s clear, then, that a metal roof is going to be much less of a heat retainer/heat producer than most any other type of roof. Which leads to the question: should you go with a lighter-colored metal roof? For many homeowners, the answer is yes – if for no other reason than to supplement the reflective power already inherent in the roof. But whatever metal roof color you choose, you’re going to find your house less of a summer heat trap than with your current roof.
Learn more about the multiple benefits of adding a new metal roof to your home by calling the experts, Advanced Aluminum of Lakeland, FL. We build top-grade metal roofing products used by leading contractors throughout the Lakeland area. Call (863) 648-5787 today to get your questions answered.