The holes are positioned so as to leave a 1 2 air space between the foil and the underside of the roofing.
Foil roof insulation philippines.
Some folks on one of the philippines expat forums noted that although thin the insulation was pretty effective.
Holes are drilled in the purlins and the tie wire in threaded through the purlins.
Glasswool insulation rockwool insulation elastomeric closed cell polyofelin insulation polyehylene foam insulation reflective aluminum bubble insulation.
Bubble insulation roofing insulation.
They also went on to note that they thought most of the effect was due to the radiant barrier aluminum foil reflecting the infrared radiant heat coming down from the metal roof.
5 16 nominal thickness of foil bubble insulation highly reflective foil facing acts as 100 vapor barrier dimension 1 meter w x 50.