Shingle Roofs are particularly tricky to manage for heat gains, as overheating is not a desired condition for the asphalt based materials, shortening the life of the roof.
Homes with shingle roofs can be particularly brutal in the summer months due to the high heat gain and thermal mass of the shingles (holding heat in the attic well into the evening). A very heavy insulation system at the ceiling level is therefore usually in order, to combat these temperature differences in the attic system below the shingles.
A venting strategy is usually required for the shingle roof system to maintain long-term roof warranties. This typically involves some kind of continuous venting from the eaves up to the ridge where continuous vents are installed.
Using Infinite-R™ within the construction of the shingle roof assembly helps significantly lower shingle temperatures, and allows the building to achieve a “hot roof” design whereby no venting is required for the attic system (a big source for heat loss if the attic insulation system is not perfect)
Combining Infinite-R™ with a rigid insulation barrier allows the the phase change material to transition (melt) slowly, while stopping overheating of the shingles (in summer). In winter, the phase change materials will store heat loss from the attic or living space below. This detail is ideally coupled with a mechanically controlled (or solar) attic fan for exhausting of unwanted heat in the summer, while encouraging heat gain in the winter months.
Care should still be used to ensure proper exhausting of moisture from living spaces below.
Infinite R™ as a thermal barrier within the attic system (under the insulation) removes excess heat penetrating the attic in the summer (and cooling shingles) and stores lost heat in the winter to reduce energy costs and increase comfort.