Why Foam Insulation?Most people are familiar with the more traditional type of insulation: fiberglass. Fiberglass, while it is a better insulator and easier to install than its for bearers, has now been outclassed by spray foam insulation. Fiberglass works by trapping air in tiny particles of glass, which reduces heat transfer. But while fiberglass has kept people in all climates fairly comfortable, it has some serious drawbacks: tiny fragments of glass can be disturbed during installation or inspection, and these are very hazardous to health; wet fiberglass is useless; it has a fairly short lifespan; it can slump down the walls over time, reducing insulation effectiveness; and it collects dust, rodent droppings, and other allergens over time.
Foam insulation, on the other hand, is superior in all ways to traditional fiberglass. Although the initial installation is more expensive and must be performed by a trained expert, the energy savings over time, as well as the much longer lifespan, means you will end up saving money in the long run. In addition, foam insulation is far better at preventing heat transfer and drafts, and closed cell foam insulation actually acts as an air, vapor, and moisture barrier, which preserves the integrity of your structure by helping to prevent rot and water damage.
Open Cell and Closed Cell Foam InsulationThe two types of foam insulation are open cell and closed cell. Open cell foam insulation is lighter, spongier, and less dense than closed cell. It does not have as high an R-value as closed cell foam, but it still outperforms fiberglass with ease. Open cell foam is less expensive to install, is used in interior applications only, and is superior as a sound barrier to closed cell.
Closed cell foam insulation can be used in both interior and exterior applications. It is denser and more rigid than open cell because gases are trapped inside the cells of foam. It acts as a heat, moisture, and vapor barrier, and its rigid strength contributes to the structural integrity of the walls.