Radiant Barrier Roofing

Properly installed radiant barrier before metal shingles are installed. This shows the proper creation of an air space.

2 thoughts on “Radiant Barrier Roofing

  1. I do trust all of the ideas you’ve offered in your post. They’re very convincing and will definitely work. Thanks for the post.

  2. 1. I am building a new house in the Phoenix, AZ area. The roofing is white galvalume metal shingles with a profile that gives a relatively small air space if applied directly over roofing “felt” over 1/2″ OSB roof sheeting with radiant barrier foil facing the attic. Would there be any substantial extra benefit to applying another layer of radiant barrier to the bottom side of the attic rafters?
    2. I am using white WPC siding on the exterior walls. The WPC profile creates a 1/2″ air space between the WPC siding and the 1/2″ OSB exterior shear walls. Would using a perforated radiant barrier as a house wrap between the WPC siding and the OSB be beneficial? Or would installing the radiant barrier on the interior stud face be better, as described in “3” below?
    3. I am using the same white WPC siding as the interior wall surface, which creates the same 1/2″ air gap from the interior face of the studs. I am using black vinyl faced 3″ poly-iso foam board in the 3 1/2″ wall cavity, which can be installed against the exterior OSB, or centered in the cavity, or flush with the interior edge of the studs and adding a perforated radiant barrier on the interior face of the studs before installing the WPC siding. What would you recommend?

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