Radiant Barrier Insulation Flat Roof

Sunshield radiant barrier for roofs and exteriors is excellent for roof and outdoor wall applications.

Radiant barrier insulation flat roof.

Roof systems on commercial buildings or flat roofed residences are usually quite different from most residential roofs. Prevents corrosion and surface deterioration. It is meant to supplement insulation not replace it. April 19 2019 posted in.

The hot roof material then radiates its gained heat energy onto the cooler attic surfaces including the air ducts and the attic floor. A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic. Increasing summer energy consumption and cooling costs. This method also reduces the heat subject to attic mounted ac duct work thereby allowing them to work more efficiently.

A radiant barrier is designed to increase the effectiveness of your thermal envelope. Radiant barrier is a highly reflective material typically made of aluminum which blocks the transfer of radiant heat by reflecting it away from its surface offering a permanent way to reduce your monthly utility costs. A radiant barrier works best when it is perpendicular to the radiant energy striking it. Installing a radiant barrier underneath the roof will cause the roof temperature to increase by a few degrees usually 2 10º.

The temperature of the attic space increases and that heat is transferred to the building below. 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. During cold weather a radiant barrier on top of the insulation could cause water vapor to condense on the barrier s underside. The heat that would normally be absorbed by the insulation is now being bounced back to the roof deck and causing the roof to emit more heat upward rather than both upward and downward.

1 the existing insulation could become wet and lose some of its insulating value 2 water spots could appear on the ceiling and 3 under severe conditions the ceiling framing could rot. By reducing the amount of radiant heat reaching the insulation in your attic the insulation remains cooler and is able to keep your home more comfortable. 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. Condensation of large amounts of water could lead to the following problems.