Research by the Florida Solar Energy Center (FSEC) found that radiant barriers work best when installed with foil-face down (towards the building interior) and applied under the roof sheathing.
How do you use foam insulation board?
https://www.youtube.com/watch?v=1VpBhY36krg
How do you use reflective foil insulation?
https://www.youtube.com/watch?v=kabzjaKvXIc
Which way does the facing on insulation go?
The first layer should have the facing against the drywall to act as a vapor barrier. (The general rule for insulation is that the facing always goes toward the conditioned space.)
Does side of insulation face matter?
Picking the right face is essential with fiberglass insulation that has a vapor barrier (meaning with Kraft paper or foil attached on one side). It should always face the warm-in-winter side. Thus, in cold climates, it should face the interior; in hot humid climates, it should face the exterior.Mar 25, 2014
Which way round does foil backed insulation go?
The foil insulation goes on top of the moisture barrier, followed by the roof covering. If you use bubble foil or rigid foam insulation, it also goes on top of the moisture barrier. Remember that there has to be an air space between the foil and the roofing.