Using Foil In Attic

In the absence of a foil insulation barrier the underside of the roof radiates all the heat directly into the attic.

Using foil in attic.

So just lay it out nice and easy. Place the rolled foil in one corner of the attic. Well we heard some folks were doing this installing reynolds wrap aluminum kitchen foil in their attic to block radiant heat and we wanted to learn more. So almost 4 years ago june 2010 we put out a blog post offering a free roll of insulation for anyone who would share details of insulating an attic with reynolds wrap kitchen foil.

The foil is applied to the plywood and then laid face down toward the attic space as it is installed. The foil works best and is most effective if there is about a 1 2 gap between the foil and the top of the insulation. Carefully roll the foil open so that its beginning edge is directed at the attic s corner. Do not push the foil down into the attic insulation.

In fact a florida solar energy center study which compared different roofing materials with various venting ratios and with or without radiant barrier systems rbs found that a black shingled roof vented at 1 300 vent area to ceiling area with an rbs had a 6 1 reduction in attic temperature at design maximum summer conditions and a 26 4. Your insulation has little peaks and valleys in it usually these little peaks work perfectly to keep most of the foil a little bit. Continue to roll the foil until it is completely laid.