| You will want to now the density of that material.
Here's a qoute from Ethan Winers great site:
Rigid fiberglass is available in a number of densities, as are rigid rock wool and rigid mineral wool which are very similar. I'm most familiar with Owens-Corning rigid fiberglass, and that brand is commonly available in three densities. Their most popular product is 703, which has a density of 3 pounds per cubic foot (pcf) or 45 kilograms per cubic meter. |