, such as fiberglass, as foam offers a superior air seal to go along with the R-value. That is very important. Closed cell foams are generally 1.5 pound to 3 pound density foams. These... are closed celled foams provide an R-Value of 5.8 to 7.2 per inch are more costly than open celled foams, but offer a lower permeability rating and a higher R-Value per inch, making them..., it is an option worthy of serious consideration especially if you are planning on building a new home. Both open cell and close cell foams offer superior air sealing and monolithic barriers...

of urethane foam insulation, but it is not the only one. Urethane also has these advantages as a construction material: a) Its closed cell structure makes urethane most effective... fiber insulations fiberglass, rock wool, and cellulose fiber. Very little input went into the test for the solid insulations, such as foam glass, cork, expanded polystyrene... or urethane foam. The test does not account for air movement (wind) or any amount of moisture (water vapor). In other words, the test used to create the R-value is a test in non-real...