Residential retrofit ’08: Decra Roofing

The roof can be the largest surface on the exterior of a home. The color, style and material chosen will affect the curb appeal of the home. Time and attention go into choosing a roofing material, especially when it is time to replace the old roof. Benefits and limitations are carefully reviewed, so it’s important someone can explain them to homeowners.

When the owners of this home in Alamo, Calif., were choosing a roofing product for their re-roofing project, they wanted to enhance the look of their home with a more classic look. The original roof was a laminated asphalt shingle and it did not provide the classic look the stucco exterior and curved sections of the roofline demanded.

Tony Farber of Western Sierra Roofing promotes products that contribute to resale value, are durable with long life cycles and have a strong warranty. The homeowners said they were looking for a product that could be installed over their existing asphalt shingles, as they were concerned about their roof ending up in the landfill. Farber told them about the new Villa Tile product Decra Roofing Systems was preparing to introduce. The classic look of a tile roof was exactly what they were looking for to enhance the look of their home. The Villa Tile was the perfect product for the project because it weighs less than conventional tile and does not require the existing material to be torn off.

Additionally, the benefits of stone-coated steel were attractive to the home-owner. With a 50-year limited warranty, a hail penetration warranty and a wind warranty of 120 mph, the owners knew their home would be well protected. In fact, they liked the product so much they waited a full year for the product to be available. According to Farber, “the homeowner was so taken by the high profile and realistic barrel design that they waited for the Villa Tile to re-roof.” Their home was the first Villa Tile project in California. The homeowners chose the roof color Venetian Gold, with a solar reflectance value of .23, another selling point.

Because the new stone-coated roof went directly over the existing asphalt shingles, that material was diverted from the local landfill. This diversion, says Farber, “fits in with my commitment to green roofing practices.” Customers like hearing that ­— almost as much as saving the expense of tear-off, hauling it away and dumping it. Steel is another important component in his green roofing practices. Stone-coated steel products are manufactured of upwards of 25 percent recycled steel content. The product is recyclable at the end of its useful life and can, in turn, be used to make yet another steel product thereby reducing the burden on raw materials.

The design of the Villa Tile also helps to reduce as much as 30 percent of heated air entering the attic space. The barrels are 3-1/4 inches high, providing an offset from the roof deck. This offset contributes to the continuous airflow across the deck and helps pull the heated air away from the attic. Less heated air in the attic moving into the conditioned space equates to less stress on the cooling system and lower energy consumption.

Installing products on a batten system is another way to achieve the necessary offset for the heat reduction benefit. Other stone-coated steel profiles are installed on battens and Farber discusses this with his customers. “I’ve always known there was a benefit to having an airspace between the deck and the roofing product,” he says. “Recent studies are helping to prove my case and I tell my customers about this benefit.”

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