Metal Roofing Over Insulation

One of the more popular methods of placing metal roofing on a home is to lay down purlins across the existing shingles.

Metal roofing over insulation.

Due to the configuration of the metal roof panels it is first necessary to install an eps expanded polystyrene insulation in between the metal ribs of the roof panels to create a smooth surface to support the 1 1 2 iso polyisocyanurate roof insulation over which the 60mil white tpo roofing membrane is installed. The blanket material is available in various r values and thicknesses. Roofing insulation blanket consists of a lightweight flexible bulk mineral insulation blanket faced on one side with reflective foil laminate. Make sure that the insulation you are using is the same thickness so that the metal roof will fit better.

Install rigid foam insulation over the entire surface of the roof. Foam insulation can be used in existing roof structures. Metal roofs are made from steel copper or aluminum panels. Both materials make a great physical barrier between the interior building and the metal roof.

The batts are located side to side on the rafter of the roof. By using roof huggers the existing roof can be left in place. In this case simply lay the insulation between the purlins. Metal roof insulation is the best way to control condensation temperature and reduce unwanted noise.

Use duct tape to seal the seams and further protect against moisture air leaks. Stabilizing the interior temperature and help to prevent material from collecting under the roofing material. Metal roof insulation addresses two major goals. Yes providing a layer of insulation under a metal roof is imperative because metal is naturally a better heat conductor than wood.

The use of roof hugger systems allows you add blanket rigid and or reflective insulation between the existing and new roofs. They are used in commercial and residential structures to protect against weather and other exterior elements. According to the manufacturer s instructions install the metal roofing panels over the insulation. Fiberglass batts or glass mineral wool metal roof insulation the most common material used for an insulating metal roof is fiberglass batts or glass mineral wool.