Closed Cell Foam Insulation
Foam board insulation, which uses foam core boards, and expanding foam insulation, which uses foam spray, are the two most popular methods of insulation. While foam board insulation offers its benefits, we’ll concentrate on the latter for now. Checkout Open Cell vs. Closed Cell Foam: Which Should I Choose? for more info.
When using spray foam insulation to insulate your home, you’ll come across two varieties of spray foam: closed cell and open cell foam. While the first has its own advantages and characteristics, in a head-to-head comparison, the second type of insulation comes out on top, especially when used to insulate external walls or basements.
Despite the fact that closed cell foam, like foam board insulation or any other type of insulation, has a variety of drawbacks, its benefits far outweigh them.
Here’s a quick rundown of the benefits of closed cell foam over open cell foam:
While open cell foam has a porous structure that allows water, whether liquid or vapour, to pass through, closed cell foam is impervious to this since it is not porous. This property qualifies it as an excellent vapour barrier, effectively protecting the structure from moisture and its destructive effects.
Closed cell is significantly stronger than open cell after curing because of its physical qualities, and because it is sprayed directly on the surface of the walls, eventually behind drywalls and other coverings, it becomes one with the wall, contributing its own strength to the wall structure. When this type of insulation is used on a 2 by 4 wall assembly, the racking resistance nearly doubles.
Finally, closed cell foam is a far superior insulator than open cell foam. Open cell foams have R values ranging from 3 to 4 per inch of thickness, whereas closed cell foams have R values ranging from 5 to 8 per inch of thickness. This high thermal efficiency is not only efficient from an insulating standpoint, but it is also efficient since closed cell foam uses a lot less amount of material and takes up less space.
Other benefits and drawbacks include pricing and how easy each type of insulation is to instal. Also, keep in mind that there are other types of insulation available besides spray foam, such as foam board insulation, which is made up of foam core boards.