Insulation Panel R Value

I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold.

Insulation panel r value.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. It provides about r 5 per inch. In the context of building and construction the r value is a measure of how well a two dimensional barrier such as a layer of insulation a window or a complete wall or ceiling resists the conductive flow of heat. 0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497.

Raycore s 5 1 2 inch thick polyurethane sip panel has an r value of 42. R value is the temperature difference per unit of heat flux needed to sustain one unit of heat flux between the warmer surface and colder surface of a barrier under steady state. Kingspan insulation r 3 common. 5 6 7 0 20.

Products with foil facing help the panels resist moisture vapor. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. To reach a similar r value with a sandwich panel you would have to purchase their 10 1 4 inch thick panel with an r 40 or their 12 1 4 inch thick thick panel with an r 48 insulation value.

This material offers the highest r values about r 6 to 6 5. That s 75 percent more r value for half the price. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Eps is used under roofing over foundation walls and beneath siding.

Polyisocyanurate polyurethane panel. There are three basic foam insulation board products on the. Polyisocyanurate foam panel or board foil. Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management.

Polyisocyanurate foam insulation r values pir insulation. Smaller sizes are also available. 0 56 in x 4 ft x 8 ft. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.

Working with home insulation boards insulation panels typically come in 4x8 foot sheets. R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. Insulation or other building material 9.