Roofing Material On Hot Roof Closed Attic Systems

When your attic is filled with spray foam insulation to create a hot roof your attic s temperature rises because the thermal envelope is shifted to the underside of your roof because ventilation is not present.

Roofing material on hot roof closed attic systems.

A technology on the flipside of an overlay is a roof underpinning or sub roof system called a radiant barrier. The theory behind a hot roof system is that rather than allowing heat to escape through your roof you contain it in your attic space which can save on utility costs in theory. Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house. Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow.

This dead space acts as a thermal barrier blocking heat transference from the roof to the interiors below. In hot climates where cooling expenses form the bulk of homeowners energy bills energy efficient aluminum roofing systems include an integral airspace between the metal panels and the decking. Here are some of the pros and cons of each type of roofing system. Most studies show anywhere from 1 to 5 maximum increase in surface temperature during the sunniest part of the day while at night the surface temperature drops faster than a regularly vented roof.

A hot roof is one where there is. The most commonly chosen and installed roofing system. Industry studies show that shingle temperature is only raised by a few degrees with a hot roof.