Foam Insulation


Old 04-22-08, 07:46 PM
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Question Foam Insulation

We have a 2000 square foot, 80-year old house in hot Texas. Our attic has a high pitched roof with 3 gable vents. Our heating and cooling system is in the attic. Just when we think we can make an intelligent decision, we get one more puzzle piece that challenges us. Insulating has become rocket science for us. My questions regarding foam insulation in the ceiling of our attic are: 1. Isn't a house suppose to breathe? We are being told that the gable vents will be foamed over to make sure it's igloo tight. 2. We are told that we should have carbon monoxide detectors in the attic and have our a/c heat system checked because the space is so airtight. Yes/No/concerns?
3. I understand that the foam is environmentally friendly but is there any concern for the long term effects of breathing/living in a house that has been treated with this much polyeurathane/plastic? 4. Is it open cell foam that we should use?
Old 04-23-08, 03:08 AM
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Good morning Insulate, and welcome to the DIY Forums!

I am afraid I am not knowledgeable in this area, and therefore cannot definitively answer your questions, but please check back frequently to see if someone else has replied.

The questions you pose are interesting and certainly you are wise to do some investigation. The prospect of intense Texas heat combined with foam does seem to me as if it would have to produce some type of gas that would not be healthy.

I would be seeking answers from science, not manufacturers.

Old 04-23-08, 05:53 AM
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1st you should be looking for closed cell spray foam! Open cell will breath and you do not wont that. When you spray an attic it will keep the heat out plus air seal so you will have no air movement. Closed cell foam also is as a radiant barrier so the hot summer heat will not be coming in the the attic. When you close up a home this tight you will have to bring in outside air to keep IAQ good. Closed cell spray foam is R-7 per inch.

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