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Vapor Barrier Question In Remodel.

 
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Old 12-07-2011, 09:17 PM   #21
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Re: Vapor Barrier Question In Remodel.


I tend to see a lot of this. Homeowner says "fix the water stain on the drywall"...
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Old 12-07-2011, 10:21 PM   #22
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Re: Vapor Barrier Question In Remodel.


No VB in a basement. Moisture will come in and won't have a way out.
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Old 12-07-2011, 10:36 PM   #23
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Re: Vapor Barrier Question In Remodel.


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No VB in a basement. Moisture will come in and won't have a way out.
Interesting thought. How will it get in past the VB?
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Old 12-07-2011, 10:38 PM   #24
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Re: Vapor Barrier Question In Remodel.


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Interesting thought. How will it get in past the VB?
It won't. Migrates in via the foundation and gets trapped at the VB. Only place to go is into the studs or condense and drip down to the bottom plate. Of course, the bottom plate should be treated.
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Old 12-07-2011, 10:47 PM   #25
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Re: Vapor Barrier Question In Remodel.


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It won't. Migrates in via the foundation and gets trapped at the VB. Only place to go is into the studs or condense and drip down to the bottom plate.
Aye, there's the rub. In theory, the foundation and slab should be waterproofed/protected from such infiltration--IOW, have a vapor barrier on the outside.

In practice, there will be warm moist air inside the basement that WILL condense on those cooler masonry surfaces unless it's prevented from reaching them, by means of a VB.

Double VB.
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Old 12-07-2011, 10:48 PM   #26
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Re: Vapor Barrier Question In Remodel.


I run a dehumidifier in my basement 24/7 in the summer. 6 hours on/off in the winter. So much for theory
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Old 12-07-2011, 10:54 PM   #27
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Re: Vapor Barrier Question In Remodel.


I think we have plenty of evidence that yours is far from the theoretically perfect basement.
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Old 12-07-2011, 10:55 PM   #28
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Re: Vapor Barrier Question In Remodel.


Ouch
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Old 12-09-2011, 01:39 AM   #29
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Re: Vapor Barrier Question In Remodel.


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I tend to see a lot of this. Homeowner says "fix the water stain on the drywall"...
This was caused by...?
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Old 12-09-2011, 01:49 AM   #30
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Re: Vapor Barrier Question In Remodel.


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Interesting thought. How will it get in past the VB?
What Angus said. But don't take my word on it:

http://www.buildingscience.com/resou...r_code_changes
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Old 12-09-2011, 06:35 AM   #31
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Re: Vapor Barrier Question In Remodel.


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This was caused by...?

Pure eeeeeeeeeeviiiiiil.
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Old 12-14-2011, 10:31 PM   #32
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Re: Vapor Barrier Question In Remodel.


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No VB in a basement. Moisture will come in and won't have a way out.
You can't build a house in BC without putting VB on your basement exterior walls....

?? The code book where you are from really says not to use it?
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Old 12-14-2011, 10:33 PM   #33
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Re: Vapor Barrier Question In Remodel.


Maybe you shouldn't use a VB if you Foundation isn't damproofed? Damproofing is code too obviously but , likely not from house built in the 70s....
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Old 12-14-2011, 11:04 PM   #34
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Re: Vapor Barrier Question In Remodel.


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Pure eeeeeeeeeeviiiiiil.
No sill gasket?
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Old 12-15-2011, 10:58 AM   #35
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Re: Vapor Barrier Question In Remodel.


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You can't build a house in BC without putting VB on your basement exterior walls....

?? The code book where you are from really says not to use it?
If the foundation is sealed and won't allow the transfer of moisture, then why do you need a VB on the interior wall?
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Old 12-15-2011, 09:22 PM   #36
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Re: Vapor Barrier Question In Remodel.


well lets see what else makes moisture in a house
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Old 12-15-2011, 10:13 PM   #37
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Re: Vapor Barrier Question In Remodel.


An interior vapor barrier is needed but it should not be attached to the framing - best method is attaching a dimpled drainage mat to the foundation (sealed at the top / sides & run long to the basement drainage system / weeping tiles, etc...) now you have a drainage plane & vapor barrier if installed properly
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Old 12-15-2011, 11:27 PM   #38
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Re: Vapor Barrier Question In Remodel.


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An interior vapor barrier is needed but it should not be attached to the framing - best method is attaching a dimpled drainage mat to the foundation (sealed at the top / sides & run long to the basement drainage system / weeping tiles, etc...) now you have a drainage plane & vapor barrier if installed properly
That would be the only way I would do it. That way any moisture would drain right into the drain tile system.
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Old 12-15-2011, 11:32 PM   #39
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Re: Vapor Barrier Question In Remodel.


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That would be the only way I would do it. That way any moisture would drain right into the drain tile system.
I would gold leaf it first. We always gold lief everything.

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