Reflective Insulation Under Metal Roof

Leave gaps between panels.

Reflective insulation under metal roof.

Some homeowners choose to use unfaced fiberglass insulation batts. Our products are recognized for their thermal performance easy installation versatility and price. This reduces the need to go up and down the ladder for tools pieces of insulation and making measurements. Before doing any work with the metal roof insulation you should have it brought up onto the roof.

Foil insulation is a radiant barrier and it works by reflecting heat from the metal but for it to do its job there has to be a layer of air between the roofing and the foil. Attach furring material onto the metal roof. The most common material used for an insulating metal roof is fiberglass batts or glass mineral wool. Cut panels on roof.

Begin at the gable and start unrolling the first row from the ridge to eave on top of the furring material. The reflective side of the insulation should be facing the open air space. Measure roof dimensions and pre cut the insulation as needed. Under metal roof insulation that loses r value due to moisture once fiberglass insulation gets wet and it will get wet due to condensation it will lose r value.

Both materials make a great physical barrier between the interior building and the metal roof. Some types of metal. The batts are located side to side on the rafter of the roof. You can install fiberglass insulation against the metal roof and prevent moisture problems if you cover it with a vapor barrier.

Water trapped between fiberglass insulation and the exterior of a building will also cause mold fungus growth rust and oxidation conditions that will degrade the metal and shorten the service of the structure.