Types

Open cell spray insulation includes cement based and phenolic based foam. The closed cell types of spray insulation include polyiso and polyurethane applications.

Features

The R-value of each type of insulation is different depending on the substances that construct it. The R-value of cement based spray insulation is approximately 3.9 per inch of thickness. The R-value of phenolic spray insulation is approximately 4.8 per inch, whereas the R-value of polyiso and polyurethane are 7 to 8 per inch applied and 3.6 per each inch of thickness installed respectively.

Significance

Closed cell spray insulation has a higher R-value for a denser and better insulation property than the open cell category.

Problems

Cementitious spray foam insulation is nonflammable but can be easily damaged by leaking water. Phenol-formaldehyde or phenolic foam for spray insulation has up to 2 percent shrinkage factor after the curing process will supply you with less insulation after drying. Polysiso is a plastic-based foam insulation and when the gas escapes polysiso over a period of years it will decline in R-value by about two points.

Considerations

Adding a radiant barrier of a reflective foil product will add an additional insulation value of R-2 to your overall heat resistance value.

Source:

Types Of Spray-In Insulation

Benefits of Spray-in Insulation