Exterior Roof Insulation Under Shingles

The three layers of rigid insulation have yet to be.

Exterior roof insulation under shingles. There are many kinds of foam insulation. Roof to wall air seal note the connection of the new roof deck membrane overlapping the trimmed back original gable overhang and catching the white housewrap water control layer and air control layer behind the wall exterior insulation the blue layer of foam. Stabilizing the interior temperature and help to prevent material from collecting under the roofing material. Currently there is no insulation anywhere and the third floor basically an enclosed attic gets crushed by heat in the summer.

Yes providing a layer of insulation under a metal roof is imperative because metal is naturally a better heat conductor than wood. Appreciate this extremely helpful blog. Foam is also a suitable material for use under roofing shingles. Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.

Nail it around the edges with roofing nails. The first problem is that shingling nails that have to go through an inch of foam will not hold the shingles well against high winds. Plan to replace asphalt shingle roof with standing seam metal. Kara lives in bc and has foam insulation over her roof with shingles over the foam.

Rigid insulation under a cool roof in zone 3. Some foam insulation are quite rigid and they are cut to size and placed under the roof. She wants to put on new shingles and questions having them right over the foam you are right to question that application. I live in charleston sc in an old 1858 3 story wooden house.

Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow. In other cases it is sprayed into place where it later expands and fills the space under the roof.