Urethane Foam Insulation R Value

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Urethane foam insulation r value.

Foam board insulation types. Polyurethane is a closed cell foam insulation material that initially contains a low conductivity gas in its cells. Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior. With higher r value comes higher insulation.

R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. In comparison glass wool typically has an r value of only r 3 to r 4 per inch. Foamular extruded polystyrene xps rigid foam insulation offers foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products choose the strength you need from 15 to 60 psi and exceptional moisture resistance. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.

In these cells there is a low conductivity gas that shields the house from losing warm or cool air. There are three basic foam insulation board products on the. By expanding 100 times its original size icynene seals cracks and gaps in attics walls ceilings and other spaces where air might escape. The highest r value can be found in closed cell polyurethane spray foam.

As a result of the high thermal resistance of the gas spray polyurethane insulation typically has an initial r value around r 3 4 to r 6 7 per inch. This type of spray foam is used in buildings and houses. Open cell foam cells are not as dense and are filled with air which gives the insulation a spongy texture and a lower r value. Icynene sprayed in foam is an insulation and air seal system that works to help ensure that your home doesn t suffer from air loss while providing an effective r value.

Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. As a benchmark one inch of solid wood has an r value of 1. A higher insulation r value usually means a higher price point as well. 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.

The common denominator among varieties of insulation is the r value. Like polyiso foam the r value of closed cell polyurethane insulation can drop over time as some of the low conductivity gas escapes and air replaces it in a phenomenon known as thermal drift or ageing. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve.