Spray Foam Insulation has High R-Value
R-value is used to measure insulation. The higher the R-value, the better it will perform and the higher the efficiency. However, the test to determine R-value doesn’t take into account air movement which creates a rather large problem.
For example, if you were to install an R-19 fiberglass batt or an R-19 spray foam they should perform exactly the same right? WRONG! The R-value says they should perform exactly the same. The problem is, if there is a 20 mph wind blowing through your insulation the actual performance of the fiberglass will be almost zero, while the airtight spray foam will be exactly what it tested in at, R-19.
Therefore spray foam will provide you with the highest R-Value performance due to its air sealing capabilities. Fiberglass batts have an R-Value of about 3.5 per inch, but they do not air seal. Spray Foam products, depending on the open or closed cell composition, range from about 4 per inch to over 7 per inch.
Utility energy savings of 30% – 50% can be achieved compared to other insulation systems. The cost of SPF can often be recovered in less than 5 years, simply through energy savings alone.
It is a fact that one of the most sought after benefits of spray foam insulation is energy savings. However, with the diversity and efficiency of this insulating material, it’s got more to offer than just the cost effective benefits it provides. It will keep your home healthy and comfortable to live in.