I have been given two estimates to insulate the crawl space subfloor of my home. One specifies 5" of open-cell Icynene spray foam and the other specifies 1" of 2lb. closed-cell polyurethane spray foam. The R-value of the Icynene quote is 17, and the R-value of the 2lb. poly is 7. I can add another inch of the poly spray to increase the R-value to 14, close to the other R-value and about the same price, but the company providing the estimate says it's overkill since the rigid nature of the 2lb poly insulation repels water, moisture, mold, and critter infiltration. The Icynene is a softer material than the 2lb. poly, but the company providing that estimate calls their product a final insulation solution. I want a permanent solution to insulating my floors from moisture, air, mold, and critters. What is the best choice between these two? I will also put down a 6-mil vapor barrier and eventually get a professional grade de-humidifier.
2007-01-10
15:18:27
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4 answers
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asked by
Home Renovator
1