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Agrackle
Citizen
Username: Agrackle
Post Number: 4
Registered: 2-2004
| | Posted on Tuesday, December 28, 2004 - 10:41 am: | 
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I've read a lot about using vapor barriers in areas of high moisture/humidity prior to putting up sheet rock. Does South Orange qualify as high moisture/humidity and do any of you have experience using or wishing you had used vapor barriers? The insulation I'm using has craft paper, but it doesn't seem like it would be totally moisture proof.
Your thoughts/suggestions are greatly appreciated. |
Travis
Citizen
Username: Travis
Post Number: 52
Registered: 6-2004
| | Posted on Tuesday, December 28, 2004 - 5:28 pm: |
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Go to www.buildingscience.com. VB is a topic of much controversy, this will at least give you food for thought. Conventional wisdom is that in a heating climate (here) you should have a VB on the inside, on the outside in a cooling climate. There are other schools of thought. In talking to the MW building dept, their worry seems to be mainly about FG insulation getting damp and losing effectiveness, not so worried about dry rot, maybe because these old houses leak air like sieves.
The kraft paper is worthless as a VB. You could put up polyethylene sheeting behind SR (6 mil) or you could just paint the walls with a low perm paint. But you have to be careful to seal every possible source of a vapor leak: every nail hole, every receptacle, etc.
Edit: Having said that, most people just use the kraft paper as a VB and leave it at that. |
Travis
Citizen
Username: Travis
Post Number: 54
Registered: 6-2004
| | Posted on Thursday, December 30, 2004 - 10:52 am: |
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As a postscript: I just took out some rug-like material that someone had put over gaps in T&G sheathing on the gable wall in the attic....Rug was damp and wood was downright wet behind it.... Since it hasn't rained in a few days, I'm assuming that this was condensation of internal water vapor.... |
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