Exterior Roof Insulation Under Shingles

Single ply roof insulation.

Exterior roof insulation under shingles.

It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. They are used in commercial and residential structures to protect against weather and other exterior elements. Rigid insulation under a cool roof in zone 3. 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.

Nail it around the edges with roofing nails. Radiant barriers use large aluminum foil sheets under the roof s interior to reflect the sun s heat. I live in charleston sc in an old 1858 3 story wooden house. Asphalt shingles a water control layer such as roofing underlayment that is impervious to liquid water and.

Appreciate this extremely helpful blog. Eps is used under roofing over foundation walls and beneath siding. Single ply roof systems can provide an easy to install seamless roof assembly. Over the foam you will need something to nail the roofing to usually a solid sheet of plywood or osb.

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. The water control for a sloped roof includes a rain shedding cladding e g. More insulation on the exterior is good. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses.

Because this strategy involves exterior insulation and over roofing it presents the opportunity to establish a robust water control system at the roof. 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. The three layers of rigid insulation have yet to be. Plan to replace asphalt shingle roof with standing seam metal.

It typically has 3 variations. Metal roofs are made from steel copper or aluminum panels. Currently there is no insulation anywhere and the third floor basically an enclosed attic gets crushed by heat in the summer. Rigid foam board is just above the roof deck or an exterior insulation option.

To save a step i would recommend using a nailbase panel foam preadhered to osb or sometimes plywood on one side only see photo facing page. 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.