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We are thinking about putting foam insulation into our exsiting home (built in 1928, so there is currently no insulation at all). Does anyone know anything about how this compares to regular blown in insulation. The insulation guy says its better...but it is his product.
Icynene foam insulation does have a higher R-value than fiberglass, cellulose, or cotton. It also has sealing characteristics (it will close off any air infiltration spots) making a house air-tight and reducing the chances of an electrical fire within the walls. Other advantages- no moisture absorbsion, no "settling", and no loss of fire retartency, as with cellulose and cotton. But, in your particular case because of the age of the home- you probably won't need an air exchanger. The only thing that I could caution you on is this- When foam insulation is installed in a "retro-fit" application, there maybe obstructions within the wall that can sometimes be missed by the installer- creating voids in the insulation envelope. Other than that- it does cost quite abit more than f/glass.
Although I haven't spoken to my insulation contractor to verify (the question hasn't come about)- I'm sure the cost of the Icynene has gone up here lately due to the ever increasing purchase price of petroleum (Icynene is petro-based).
Which got me to thinking- there is a new form of foam insulation on the market that is made from bio-content polyol. Being new may not mean cheaper but, if petroleum prices keep reaching for the $100.00 market- it might be in the near future. Check link below for more info.
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