Roofing tiles are the only materials currently in use that possess two inherent qualities necessary for energy reduction: first, the natural thermal resistance in the raw materials themselves that are created by the larger cross-sectional areas of the tiles while installed. Secondly, since they are installed individually, rather than in sheets or in overlapping style, the natural airspace around the tiles creates a natural ventilation that provides a thermal barrier for heat transfer to the roof deck. This “Above Sheathing Ventilation” (ASV) can result in greatly reduced heat flux transfer when compared to a baseline asphalt shingle. This can assist in the movement of the peak load demands by several hours, which directly benefits those living in warm climates as well as those in cold conditions.
Given the potential for federal tax credits and state rebates, concrete and clay tile roofs will save you money every month:
- Significantly reduces monthly energy bill
- Get credit from your local utility for power your home produces
- 30% Federal tax credit is available
- Adds significant resale value to the home
- Protect yourself from utility cost increases
- Rest assured in your low maintenance, state-of-the-art system
As early as the 1970’s, the Florida Power and Light Company conducted extensive tests on tile roofing systems to see if there was a way to help reduce the transfer of heat into the attics of homes. The Florida Solar Energy Center (FSEC) continued testing and found that “direct deck tile systems” reduced ceiling heat flux by nearly 40 percent. As recently as the mid-1990’s, FSEC concluded that vented tile roofs reduced ceiling flux by as much as 48 percent compared to the commonly-used black shingle roof.
In recent years, the Tile Roofing Institute has worked extensively with Dr. William Miller at Oak Ridge National Laboratory to conclusively document the natural ventilation properties of tile roofs. This breakthrough research has shown that air flow beneath the tiles, otherwise known as sub-tile ventilation, combined with a pitched roof design, creates a natural – and eye-popping — cooling effect that can be quantified. Notably, his research has shown that heat transfer through the roof deck into a home’s attic space can be reduced by a full 70 percent when compared to a conventional asphalt shingle roof on the same house.