Radiant Barrier Installation Flat Roof

Increasing summer energy consumption and cooling costs.

Radiant barrier installation flat roof.

A key advantage to the foil is that it can be installed by the homeowner in an existing attic. Installation methods include radiant barrier draped over the rafters applied directly to the roof sheathing stapling to the bottom of the rafters and even laying radiant barrier on top of the attic floor insulation. Simply roll out roofing felt or another type of underlayment. With these types of roofing systems a radiant barrier can be incorporated easily and economically.

Using radiant barrier outside on flat roofs concrete buildings would laying atticfoil directly on the roof of these buildings be effective in reducing the heat absorbed by the roof and radiating into the structure below. Ed finally debunks the myth that radiant barrier works directly. The first is stapling foil to the bottom of the roof rafters the second is laying it out over the existing attic ceiling insulation. When the sun heats a roof it s primarily the sun s radiant energy that makes the roof hot.

For the majority of installations there are basically two different methods used to install radiant barrier foil in an attic. April 19 2019 posted in. Much of this heat travels by conduction through the roofing materials to the attic side of the roof. Radiant barriers are utilized to reduce summer heat gain in attics.

The temperature of the attic space increases and that heat is transferred to the building below. When laying the foil insulation it is not. Attics heat up when the sun s radiant energy heats the shingles and the heat is transferred to the interior attic space through the roofing materials via conduction. The radiant barrier should be installed in a manner to minimize dust accumulation on the reflective surface.

If you ve ever been told that foil works if you put it under shingles this video is for you. It is also recommended to notch the battens or leave spaces between the battens to allow for more airflow between the roof deck and the roofing material. Then roll out perforated radiant barrier foil install battens as per manufacture instructions and attach roofing product. Roof systems on commercial buildings or flat roofed residences are usually quite different from most residential roofs.