We cannot decide what would be best to use to insulate our new home. We had heard good things about spray foam insulation however we were concerned with making the home 'too tight' where mold might grow on the wood or perhaps mildew should water penetrate the home. Please provide advise as to the best product and substantiate your advise. Thanks for your help!
#1 by bill b on :
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Spray foam comes in closed cell and open cell types, and is very expensive due to it's application. Vapor barriers are not always a good thing, and can do a lot of damage of not properly installed to your individual situation.
There are pros and cons for every material on the market today. If there was something that is best for all situations, we would nothing to choose from.
Go to dowbuildingmaterials.com for a cognitive list of different foams and reasons for use, as well as a good faq section in an area called "answers" under one of the drop down menus.
Your question has so many different variables that may or may not apply, it would be impossible to discuss here. Talk to your architect or local building code office, they will have a better idea for your area of the country, humidities, temps, snowfall, rainfall, etc.
#2 by Bert V on :
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spray foam it gives a pefect vapour barrier and air seal