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Old 12-22-2009, 08:09 AM   #1
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which insulation?


which insulation would you prefer owens corning or john manville? Is one better than the other? I don't care about the price. I'm leaning more towards john manville since it's formaldehyde-free. Any thoughts?

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Old 12-22-2009, 08:32 AM   #2
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which insulation?


Do you think that 'formaldehyde-free' insulation is a fact - or a marketing ploy? Who do you believe anyway if someone had an opinion?

Could be the latter in what is a competitive market. Are you allergic to it? do you know about some of the other products that contain formaldehyde that you may be using right at this momnet that are of far greater concern?

I can tell you that most preservatives (e.g in cosmetics and personal care products) used daily to preserve the products we consume contain formaldehyde - either as is (it's very cheap to buy) or as a result of a chemical reaction that creates formaldehyde. I mean where you do you draw the line?

So, unless you're personally involved in the assessment of formaldehyde in your daily life, then you are left to go with your gut feeling. Do that.

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Old 12-22-2009, 11:36 PM   #3
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which insulation?


The higher the R-Value the better you are. You want 8" thick in ceilings.
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Old 12-23-2009, 07:10 AM   #4
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which insulation?


Carlisle makes a good point. If formaldehyde is an issue, then forget owning upholstered furniture or any carpeting. And you can totally forget owning a car. I think the whole formaldehyde free thing is a marketing gimmick. The exposure levels are way, way below any action level. As far as 8" of insulation in a ceiling, that would depend on the location or the material. Around here it's R-38 minimum. Not any particular thickness of anything. R-38 would be equivalent to 12" of fiberglass.
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