Spray foam insulation types include open cell and closed cell foam insulation. The following is a summary of their differences.
- Cells are not completely closed
- Foam is lightweight
- Foam provides and air barrier
- Less expensive than closed cell
- Higher R value
- Doesn’t provide a vapor barrier
- Foam cells are completely closed
- Foam is higher density
- Provides a vapor barrier
- More expensive
- Lower R Value
Open cell insulation is lightweight foam and is the less expensive option of the two. It stays soft and flexible. Closed cell spray foam is a higher density product and becomes hard and durable when cured. it is a more expensive product that also serves as a moisture barrier. It is more suitable for basements and under-grade application than open cell foam.
Open cell spray foam insulation type can be used for homes or business structures and is a great option for attics and non-vented crawl spaces. It out performs fiberglass batting insulation by to 4 times as it expands into place. And, importantly, it will not sag or lose its loft over time.
Closed cell spray foam insulation type has an R-value of nearly 6.8 per inch. It is rigid structurally and can add strength to walls. It can provide a vapor barrier when install in all wall cavities and deters the growth of mold and mildew. It should last the lifetime of a home without sagging or shifting.