Roof Insulation Between Shingles

There are five primary types of insulation for roofs with their own advantages and disadvantages.

Roof insulation between shingles.

What s the difference between an asphalt shingle and metal roof. Asphalt shingle roofing is a dominant material for residences. Batts between rafters in would require adding ventilation between the insulation roof deck. If you do not have proper ventilation you are in essence cooking your shingles.

Pv solar shingles roof from tesla. Finished roof back then looked pretty good seventeen years ago. Photograph 2 above right. Now there are metal shingles and panels that imitate materials like slate tile wood shake and even asphalt.

The main concern with spray foam insulation and shingle warranty is proper attic ventilation. No matter it is an office or a home a layer of metal roof insulation will give you a lot of benefits. This is also known as thermal resistance and is often measured in terms of r value. Hack n stack sealed foam board between the rafters would be better since it s at least an air impermeable insulation but even that would require a vent gap below the roof deck to meet code and you d still be under r38 on that 2x6 rafters unless you fattened it out per holladay s recommendation.

Homes with insulated rooflines have slightly higher shingle temperatures than roof decks with radiant barriers 7 f vs. Evolution of solar roofing. The key value is always the capacity of insulation to resist heat flow. Rafter cavity insulation high density spray polyurethane foam fills rafter cavity 2 lb ft 3 density.

One study showed that shingle life is reduced by less than a year on homes in miami with no attic ventilation. Nail metal flashing along the edges of the. Another study showed a 2 year reduction. How to put rigid foam insulation on the roof before putting on shingles 1.

The layer can be installed over the existing shingles new roof decking or simply over open rafters. Put on your roofing safety harness and secure the safety rope to the top of the roof. An attic that is properly vented has 50 intake of fresh air and 50 exhaust of the hot air. Current options costs.

Radiant barrier spray metal roof insulation adding the metal roof insulation can be done easily when you renovate your house. Unroll roofing felt to cover the plywood on the roof and nail it in place. Here s a bit of anecdotal evidence for you. However metal roofing is surging in popularity as more aesthetic options become available.

3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof. As long as the plywood under the shingle roof is in good condition this way can provide many benefits.