Exterior Roof Insulation Under Shingles

Rigid insulation under a cool roof in zone 3.

Exterior roof insulation under shingles.

In this article we are going to explore both financial and technical aspects when it comes to looking for the best method to insulate the metal roofing. Rockwool multifix is a mineral fiberglass faced stone wool product that can be installed under many single ply membranes. They are used in commercial and residential structures to protect against weather and other exterior elements. Because this strategy involves exterior insulation and over roofing it presents the opportunity to establish a robust water control system at the roof.

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. Single ply roof insulation. Metal roofing is one of the most durable and long lasting roof materials on the market and can easily last for decades with little maintenance. Plan to replace asphalt shingle roof with standing seam metal.

It typically has 3 variations. Currently there is no insulation anywhere and the third floor basically an enclosed attic gets crushed by heat in the summer. Over the foam you will need something to nail the roofing to usually a solid sheet of plywood or osb. Asphalt shingles a water control layer such as roofing underlayment that is impervious to liquid water and.

More insulation on the exterior is good. 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. Eps is used under roofing over foundation walls and beneath siding. The water control for a sloped roof includes a rain shedding cladding e g.

It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. Appreciate this extremely helpful blog. The three layers of rigid insulation have yet to be. Nail it around the edges with roofing nails.

I live in charleston sc in an old 1858 3 story wooden house. Rigid foam board is just above the roof deck or an exterior insulation option. Single ply roof systems can provide an easy to install seamless roof assembly. Talking about metal roof insulation this thing is one of the most challenging things people work in this field is facing it demands and requires excellent skill and expertise which you may only get from a reputable roofing contractor.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels.