Stapling Kraft Faced Insulation - 2 questions

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Old 08-31-02, 05:58 PM
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MKM
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Stapling Kraft Faced Insulation - 2 questions

Question 1: How far apart do you staple kraft faced insulation ? Every 12", 8" , 6" ?

Question 2: The sides of the insulation already have flaps for stapling to the studs. Should I peel back the end fiberglass and create flaps to staple along the top and bottom (I'm assuming this creates a fuller vapor barrier.)
 
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  #2  
Old 09-02-02, 12:45 PM
rbisys
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Greetings,

Welcome to the wonderful world of fiberglass deception.

Kraft paper is not a vapor barrier. PERIOD.
In the 80's the FTC made the FG companies stop claiming it was, so, the fiber glass people now call it a vapor retarder.

Even if you do put a plastic vapor barrier over the surface you will still get condensation. You can't prevent that. And as yopu probably know you will lose up to 50% of the insulation value and get mold as a bonus.

If you install a radiant barrier(RB) you will get about 95% efficiency with out the mold and the RB is an excellent vapor barrier.

Thank you for considering my opinion.
 
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