The common denominator among varieties of insulation is the r value.
Urethane foam insulation r value.
R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.
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In these cells there is a low conductivity gas that shields the house from losing warm or cool air.
Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.
A higher insulation r value usually means a higher price point as well.
In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.
With higher r value comes higher insulation.
Products provide superior insulating properties.
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.
Foam board insulation types.
The r value of this foam per inch ranges from r 5 to r 6.
The highest r value can be found in closed cell polyurethane spray foam.
This type of spray foam is used in buildings and houses.
Typically a higher insulation r rating means better climate control and better energy efficiency for your home.
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.
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.
In comparison glass wool typically has an r value of only r 3 to r 4 per inch.
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.
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.
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.
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By expanding 100 times its original size icynene seals cracks and gaps in attics walls ceilings and other spaces where air might escape.
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.
As a benchmark one inch of solid wood has an r value of 1.
Polyurethane is a closed cell foam insulation material that initially contains a low conductivity gas in its cells.
