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Spray foam sellers and manufacturers claim that polyurethane foam insulation can lower heating and cooling costs by as much as 30% to 50%. The actual savings are dependent on many factors that vary from one application to another, so we can't speculate about the accuracy of these figures. 

Closed-cell spray foam insulation is known to have an R-value of 6.7 per inch of cured foam. This is true regardless of the application. Spray foam insulation can also be used in other applications than walls and attics, which is something most people don't know. If you also want to buy spray foam insulation tools then you can hop over here.

Spray Foam Insulation

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Polyurethane foam kits offer many benefits, including soundproofing, sound deadening, and moisture resistance. They also seal well, repel rodents, and provide insulation. Let's take an in-depth look at the many uses of spray foam insulation. There are likely to be some that even the most experienced contractors haven't considered.

You can spray attics and between the wall studs but you should also consider the insulation of your home's rim joint. The interior cavities will be better protected against cold/hot air penetration and pest invasions by insulating the rim joist. 

Using polyurethane foam in crawlspaces is a great place to use it. Drafts can be blocked, insects can't build up, and flood damage cannot be caused. What about older homes that have water pipes outside the house? Are they at risk of freezing during winter? Spray foam insulation can be a great way to insulate them. Spray foam is not suitable for extreme temperatures (-200F and +200F), but it will be a great option for 99% of residential applications.