I am curious if all foam insulation has about the same R-value or if some types are much more effective than others? Is anyone here knowledgeable on this topic? Thanks!
- posted
16 years ago
Best Foam Insulation?
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- posted
16 years ago
Polyisocyanurate has about the highest R value. Expanded and extruded polystyrene is substantially lower, but still higher than fiberglass batt insulation per inch.
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- posted
16 years ago
In addition to the R value, look at the price. If you have the room to put thicker insulation, the polystyrene is usually the most cost effective even if you have to use more of it. If you are constrained by space, the other foams give the best insulation.