Medium Density (Closed Cell)
Low Density (Opened Cell) Foams
Medium Density foams have a closed-cell structure, which means that the gas bubbles that form during the application process remain permanently locked into the cured foam. The result is something like a three-dimensional bubble wrap with extremely tiny bubbles. Because there are no interconnections between individual bubbles, the foam absorbs little water and also resists the passage of water vapor. Medium Density foam provides the highest R-value averaging @ R 6.0 per inch (LTTR).
Low-density open-cell foams, on the other hand, have a structure more like a very fine-grained sponge. The cured material consists of a series of tiny interconnected passageways. These open cells are too small to permit the passage of much air, but they are more permeable to water vapor than closed-cell foams. Low-density open-cells average R-value = 3.5 to 3.8 per inch.
Avenue Insulation uses only the highest quality products available, and offers free consultations to help clients decide which product is the best solution.