Insulation Under Metal Roof Over Shingles

Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line.

Insulation under metal roof over shingles.

Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. Technically there is no difference in the insulation value of a metal or shingle roof. Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. No matter it is an office or a home a layer of metal roof insulation will give you a lot of benefits.

Adding additional layers of insulation can solve this problem but it will increase installation costs. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. Radiant barrier spray metal roof insulation adding the metal roof insulation can be done easily when you renovate your house. Add a preinstalled membrane to absorb and release the condensation as it forms with the natural weather cycle.

Nail it around the edges with roofing nails. Disadvantages of metal roofs. Advantages of metal roofs over shingles. The reflective barrier insulation can also reduce your cooling cost during the summer months by reflecting heat away from your homes roof.

Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Unlike most roofing materials metal roofs can be noisy especially when it rains or hails. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. E foil or foil faced bubble wrap type reflective barrier insulation can also be used as a cushion between the existing roof and the new metal roofing.

Shingle roofs weight twice as much as a metal roof which means that it accumulates twice as much heat. This can be a nuisance for homeowners. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. Common problems with shingle roofs.

Insulate and try to keep from reaching the dew point. While metal roofs are efficient at its ability to resist heat transfer it is exposed and absorbs just as much heat as a shingle roof.