Fiberglass Batts Under Metal Roofing

The most common material used for an insulating metal roof is fiberglass batts or glass mineral wool.

Fiberglass batts under metal roofing.

Fiberglass batt insulation is the itchy stuff most people are familiar with. Metal roofs are durable and last much longer than conventional roof deck and shingle constructions but they come with a drawback. Bubble insulation is not reliable. This insulation material uses fine threadlike glass formations that are woven together and mixed with other materials to form a thick insulating pad.

Fiberglass batts or glass mineral wool metal roof insulation. Batts secured to the deck with insulation hangers between top chords or more commonly tension cables secured at the ridge and eaves with eye hooks to prevent fall out. Fiberglass batts are never held in place with fasteners through the fiberglass batts never is a pretty big word. Can you place fiberglass insulation against metal roofing.

Fiberglass batts are the cheapest easiest way to insulate new walls. And fiberglass batts strapped to the roof deck are a bad idea 100 of the time. 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. 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.

Radiant barrier insulation can be used in conjunction with thermal insulation or independently. We ve seen it multiple ways. It s easy to work with and has a high r value per inch. The batts are located side to side on the rafter of the roof.

Fiberglass batts fiberglass batts is perhaps the simplest and cheapest ways to insulate a metal roof. Rigid board insulation is a more expensive option. The best metal roof insulation options include. While placing plywood under a metal roof isn t a requirement it is recommended for some homeowners.

Both materials make a great physical barrier between the interior building and the metal roof. Fiberglass consists of fine thread like pieces mixed with other synthetic materials that are tightly woven together to form a thick insulating pad. Tbd push batts all the way to the back of each stud space and then. I think i can hold the fiberglass in place by impaling it in the same way semi rigid fiberglass 703 board and 705 board is held in place but the pin needs to have more friction than this case.

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.