Exterior Roof Insulation Under Shingles

Foam is also a suitable material for use under roofing shingles.

Exterior roof insulation under shingles.

Plan to replace asphalt shingle roof with standing seam metal. 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. 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. Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.

The three layers of rigid insulation have yet to be. 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. You need roofing sheathing plywood or osb to nail the. 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.

Rigid insulation under a cool roof in zone 3. Nail it around the edges with roofing nails. Currently there is no insulation anywhere and the third floor basically an enclosed attic gets crushed by heat in the summer. She wants to put on new shingles and questions having them right over the foam you are right to question that application.

Metal roof insulation addresses two major goals. Kara lives in bc and has foam insulation over her roof with shingles over the foam. Yes providing a layer of insulation under a metal roof is imperative because metal is naturally a better heat conductor than wood. Stabilizing the interior temperature and help to prevent material from collecting under the roofing material.

There are many kinds of foam insulation. I live in charleston sc in an old 1858 3 story wooden house.