Types of Crawlspace Insulation

Attic and Crawl Space Solutions helps to protect the floor joists from freezing and dampness. Leaving it uninsulated may cause damage to the floor joists.

What is a fully encapsulated crawl space?

There are two basic types of crawlspace insulation: rigid foam and spray foam. Rigid foam is best used between the floor joists. It can be sealed with caulk or gaskets and masonry fasteners.

Spray foam is a more expensive option. However, it has a higher R-value and is less of a DIY job. In addition, it is easy to install.

Closed-cell spray foam, also known as SPF, provides both moisture and thermal protection. It works by filling tiny holes. The air is then trapped, making it an ideal moisture barrier.

Fiberglass is another excellent choice. While it is not as durable as rigid foam, it is cheaper and is easier to install. You can get it in rolls or batts. When installed properly, it will last for years.

If you want to use fiberglass, make sure it is installed with the vapor barrier facing up. Be careful not to use tension rods. They can break, causing wood rot.

If you have a vented crawl space, you may want to use closed-cell spray foam. This is a better choice than roll insulation. With its high R-value, it is able to prevent moisture from seeping through the wall.

If you do not have a vented crawlspace, you can still use closed-cell foam. For a small price, you can install a 4-by-8-foot sheet of 2-inch-thick expanded polystyrene insulation.

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