2 minute read
Benefits of Light- and Dark-Colored Roofing
by Expert Contributor Kevin O'Donnell of O’Donnell Roofing Co.
One question homeowners frequently ask when purchasing a new roof is whether a specific shingle color is best. Shingles come in many colors, and are commonly categorized as light or dark. While it seems the general consensus is that a white, reflective roof is better, when recommending a shingle color, geography, climate and building type should be primary considerations.
In the U.S., there are several different climates. In states like Arizona, where the temperature rarely drops below freezing, white or reflective roofs are advised. In those hot and warm areas, if shingles will be used (instead of, for example, terracotta tiles), white or light-colored asphalt shingles that have Energy-Star ratings are recommended as an affordable roofing option. Additionally, there are even “cool” roofing materials, both light- and dark-colored, that not only reflect the sun’s UV rays but also have a high thermal emittance quality, which dissipates the absorbed heat quickly. “Cool” roof system temperatures could be 50% cooler than other roofing materials, and could add up to savings of 10-15% on cooling costs!
States like Pennsylvania have climates more evenly split between hot and cold. The reflective nature and energy efficiency of a white roof makes sense on large industrial and commercial buildings or any building with a large roof covering. However, there are good reasons why darker roofs will look and perform better in a typical residential and even light commercial setting.
Dark-colored roofs warm up quickly, causing ice and snow to melt faster. Snow and ice on a roof for prolonged periods of time leave you susceptible to leaks. This is important, especially on the north-facing side of a home or areas with less sunlight, where you are additionally susceptible to condensation and ice damning. Though ventilation plays the main role in roof performance, a darker roof improves your chances that snow and ice will be eliminated faster because the roof is typically warmer.
Finally, all modern asphalt shingles, even those with algae-resistant qualities and mildicides, are composed of more organic fillers than ever before, and they will eventually streak and stain. Darker shingles hide that discoloration better, and it takes several years longer for the staining to become noticeable. Further considering that asphalt shingle roofs are designed to last for 30 years or more, in the northeast U.S. climate, it makes sense to choose a darker color, ensuring your roof (and home) last and look the same for a longer period of time.
Expert Contributor Kevn O'Donnell of O’Donnell Roofing Co.
O'Donnell Roofing Co. 610-449-8188
Solar Installation • Senior Citizen Discount • 4th-Generation Owned & Operated • Residential & Commercial Roofing • Windows / Skylights / Siding / Gutters • Historic Restoration & Metal Roof Specialist
www.ODonnellRoofingCo.com
