Roof Insulation Foil Up Or Down

So when the sun hits the roof and radiates into the attic or wall the foil layer of the osb sheathing reflects the heat to the roof or exterior wall which keeps the top layer of the insulation just a few degrees warmer than the outside air temperature.

Roof insulation foil up or down.

Upper foil to be nominated as vapour barrier high foil. This method also reduces the heat subject to attic mounted ac duct work thereby allowing them to work more efficiently. Radiantguard radiant barrier foil insulation installed in an attics can reduce attic temperatures by up to 30 degrees when stapled with a staple gun to the underside of roof rafters by reflecting up to 97 of the radiant heat that strikes its surface thereby reducing heat transfer from the attic to living spaces resulting in lower utility bills. Use perforated rfl foil or concertina type batts stapled to the side of the joists with non conductive staples.

Other kinds of radiant barriers combine reflective materials usually aluminium foil with materials like plastic films cardboard and kraft paper. Step 1 position the start of roll to left side of the roof with the heel. Why can t i install it the other way regardless of whether insulation is installed in a wall attic or crawlspace. The foil layer of the osb lowers the delta t because the foil is low emitting and does not emit or absorb heat.

This is insufficient for most building code compliance or sustainability requirements and will require additional insulation. Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch. While heat is radiated and conducted in all directions it always moves from hot areas to cold areas. The most effective radiant barrier sheathing is a structural roof sheathing panel which consists of an osb panel with heat reflecting foil laminated to one side.

Kim asks on your show you said that when insulating under a floor the paper facing should face up against the flooring. Antiglared anticon installed with bulk insulation side down. Foil insulation is a radiant barrier and it works by. An additional upper vapour barrier high foil layer applied on top.

When a home or office is not insulated there is nothing to prevent the harsh summer or winter conditions from penetrating the exterior walls and entering your space. Tropical breather blanket with breather facing positioned downward. With rfl insulation it is approximately r0 6 up and r1 0 down.