Re: Off topic: spray foam insulation

Posted by Oliver Power on March 16, 2007 at 05:03:10 from (74.39.37.224):

In Reply to: Off topic: spray foam insulation posted by Moline_guy on March 15, 2007 at 20:02:18:

Dave from MN is on the money. With the spray foam , you do not need air flow below shingles , so they claim. Foam also acts as vapor barrior. BUT , should you have a leak in roof , it will also hold water. Hot moist air will travel through leak in foam , and then condensate. The foam does hold heat very well. Lots of factors when it comes to insulation/ventilation. It is a continuously evolving subject. And to have a better understanding of this evolving subject , you will have had to evolved with it over time(lets say 25/30 years). Many good solid basic theries. Also factors in which to counterdict them theries.

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