Science Of Roofing Shingles

Asphalt roofing shingles especially dark ones like those shown here can get scorching hot on summer days.

Science of roofing shingles.

Wood shingles or shakes require a minimum 1 4 inch vented airspace that separates the shingles shakes and the roofing felt placed over the roof sheathing for similar reasons. Consumer reports just finished its first comprehensive review of asphalt roofing shingles in more than a decade and found that the best of the batch are more than twice as strong as the competition. Our technical chemical and engineering expertise is second to none when it comes to the roofing industry. A new coating can help shingles reflect more of the sunlight that heats them up.

These shingles are available in all the popular colors. Trudefinition duration shingles are specially formulated to provide dramatic color contrast and dimension to any roof. In ashrae fundamentals 2001 15 lb asphalt felt has a wet cup permeance of 5 6 and 15 lb tar felt is 18 2 perms. Then they ll also shed some of that heat into buildings.

For more than a century gaf has pioneered development and manufacturing of high performance residential and commercial roofing products through advanced r d and real world scientific programs. Roofing felts or underlayments vary greatly in their permeability to water vapor. The typical underlayment used under asphalt shingles in residential construction is quite permeable. The demarcation between regions that require the control of condensing surface temperatures and regions that do not can be obtained by using the hygro thermal zones.