Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Carpentry

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-23-2010, 04:32 PM   #1
Newbie
 
Join Date: Aug 2010
Posts: 3
Share |
Default

vapor barrier


hello i was just wondeing, i am building a mud room or walk in addition to my house it will be a cold room, northern climate, and i was wondering do i still need to put in a vapor barrier on the interier of the room i.e. inbetween the sheetrock and the insulation or will tyvex on the outside be enough any info will be greatly appreciated thanks

dakota_native is offline   Reply With Quote
Old 08-23-2010, 06:27 PM   #2
Member
 
Join Date: Nov 2008
Location: Northern Maryland
Posts: 46
Default

vapor barrier


If the room is going to remain unconditioned I do not believe you will need any vapor barrier. The Tyvek has nothing to do with the vapor barrier aspect of things, it does help keep wind out but....the vapor barrier that you are talking about is to keep the air that you are "conditioning", whether it be heating or cooling out of unconditioned spaces. Not to protect any unconditioned air from the inside.

Justin08 is offline   Reply With Quote
Old 08-23-2010, 08:15 PM   #3
Member
 
Join Date: Jul 2010
Location: Ontario Canada, Toronto to be exact.
Posts: 1,373
Default

vapor barrier


The vapor barrier needs to be installed on the warm side of the building envelope to be effective. This is suitable for areas where the winter is the dominant season and it gets extremely cold. In hot and humid areas, the vapor barrier is usually not needed.



epson is offline   Reply With Quote
Old 08-23-2010, 08:43 PM   #4
Member
 
Join Date: Jan 2010
Location: Saskatoon Sk. Canada
Posts: 413
Default

vapor barrier


The purpose of vapour barrier ir to keep the moisture in warm air from reaching the cold exterior side of the wall and condensing into water.Even if the room isn't heated it's probably warmer and moister than outside winter air assuming you live in Dakotas.Poly is cheap I'd put it up.
daveb1 is offline   Reply With Quote
Old 08-23-2010, 08:44 PM   #5
Member
 
Join Date: Jan 2010
Location: Saskatoon Sk. Canada
Posts: 413
Default

vapor barrier


The purpose of vapour barrier is to keep the moisture in warm air from reaching the cold exterior side of the wall and condensing into water.Even if the room isn't heated it's probably warmer and moister than outside winter air assuming you live in Dakotas.Poly is cheap I'd put it up.
daveb1 is offline   Reply With Quote
Old 08-23-2010, 08:49 PM   #6
Member
 
Join Date: Nov 2008
Location: Northern Maryland
Posts: 46
Default

vapor barrier


Quote:
Originally Posted by daveb1 View Post
The purpose of vapour barrier is to keep the moisture in warm air from reaching the cold exterior side of the wall and condensing into water.Even if the room isn't heated it's probably warmer and moister than outside winter air assuming you live in Dakotas.Poly is cheap I'd put it up.
Good point. I was just thinking a totally cold room but yeah even if it is only via solar it will be warmer, plus it is, I am assuming going to be attached to a conditioned space so that may warm it as well.
Justin08 is offline   Reply With Quote
Old 08-23-2010, 09:38 PM   #7
Newbie
 
Join Date: Aug 2010
Posts: 3
Default

vapor barrier


yeah that is what i was thinking also, it will be a cold room just added on to the house so there is no mud or rain or anything like that tracked in, think i will just add the plastic to the inside and get it done with, the only other question i have is, if i use faced or kraft insulation do i still need the plastic, or will i just be doubling everything.
dakota_native is offline   Reply With Quote
Old 08-23-2010, 11:24 PM   #8
Member
 
Join Date: Jan 2010
Location: Saskatoon Sk. Canada
Posts: 413
Default

vapor barrier


My preference is unfaced and poly.If you use faced don't use poly.Two VB is not good.
daveb1 is offline   Reply With Quote
Old 08-24-2010, 08:09 AM   #9
Newbie
 
Join Date: Aug 2010
Posts: 3
Default

vapor barrier


yeah that is what i was thinking too, thanks guys for all the answers,

dakota_native is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.