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adding attic insulation

jackelope's Avatar
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11-20-02, 09:27 PM   #1  
adding attic insulation

I need to add insulation in my attic, My question is what kind. there is allready 3.5 inches of fiberglass insulation with the paper facing up. Can i just add insulation on top of that or would that cause a problem having the facing between two layers of insluation

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RichD's Avatar

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11-21-02, 08:58 AM   #2  
The original insulation facing should be facing down - towards the heated area. If that's not the case, you should try reversing each batt.

You can easily add another 6" of insulation on top of the 3 1/2". Most stores sell 6" unfaced batts that are easy to lay in place.

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11-21-02, 11:17 PM   #3  
Attic insulation

Vapor barrier on insulation should be turned toward heated space. For fiber glass insulation info go to www.owenscorning.com.

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11-23-02, 07:31 AM   #4  

The paper IS NOT a vapor barrier. All it does is deteriorate and attract bugs. Also, the pitch used to attach the paper to the FG is an accelerant. If paper is a vapor barrier then why install plastic on the walls?

Adding FG to FG is a waste of money. See my remarks on the cellulose insulation thread.

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