Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-24-2010, 05:01 PM   #1
Newbie
 
Join Date: Jul 2010
Posts: 2
Rewards Points: 10
Default

insulating attic walls


I could use some help please. I insulated my attic walls with faced insulation. I was told it was ok to cover the insulation with plastic. I live in North Carolina and worry about moisture under the plastic and onto the insulation. what I am asking is, is it ok to cover the insulation either faced or unfaced with plastic in the hot attic??? I hope someone could give me an accuate answer...Thank you

maverick1096 is offline   Reply With Quote
Old 07-24-2010, 05:10 PM   #2
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Rewards Points: 2,000
Default

insulating attic walls


If you installed plastic over a faced insulation you would have 2 vapor barriers. You should never have 2 vapor barriers.
Ron

Ron6519 is offline   Reply With Quote
Old 07-24-2010, 05:26 PM   #3
Newbie
 
Join Date: Jul 2010
Posts: 2
Rewards Points: 10
Default

insulating attic walls


Ron thank you for the reply...Is it ok to cover unfaced insulation with plastic...?
maverick1096 is offline   Reply With Quote
Old 07-25-2010, 09:14 AM   #4
Member
 
Join Date: Jul 2008
Location: Canada (s/w ON.)
Posts: 2,294
Rewards Points: 1,000
Default

insulating attic walls


The vapor barrier should be on the 'conditioned' side of the insulation. Conditioned means on the side that faces the living space.
Wildie is offline   Reply With Quote
Old 07-25-2010, 10:45 AM   #5
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 2,000
Default

insulating attic walls


Quote:
Originally Posted by maverick1096 View Post
Ron thank you for the reply...Is it ok to cover unfaced insulation with plastic...?
Yes - OK to cover unfaced w/plastic
Scuba_Dave is offline   Reply With Quote
Old 07-25-2010, 02:38 PM   #6
Registered User
 
Join Date: Mar 2009
Posts: 9,967
Rewards Points: 2,000
Default

insulating attic walls


No, do not use plastic yet. We need to know if the wall is an interior with a roof behind or an exterior wall with siding. The siding, sheathing, and wall thickness all pertain.

2nd title here: http://www.ecohomemagazine.com/energ...gy-claims.aspx

B.S.I. says: http://www.buildingscience.com/docum...ecommendations

Vapor retarder or vapor barrier: http://www.energysavers.gov/your_hom.../mytopic=11810

Ask your local B.D. for their ruling. If this area will not be heated and stay an attic, no plastic. If an inside wall with an attic behind it, no plastic but install some house wrap to prevent wind-washing of the wall insulation on the attic side. If the location was South, the vapor barrier would go on the unconditioned side (outside) to keep the humid air out of the wall cavity.

Be safe, Gary

__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Insulating HVAC junction in unconditioned attic JakAHearts HVAC 3 06-17-2010 08:30 PM
Sealing or insulating attic fan Blondesense Building & Construction 11 12-12-2009 03:39 PM
Insulating walkin attic Kurt1968 Building & Construction 17 12-10-2009 06:19 PM
Insulating basement walls organick General DIY Discussions 7 10-30-2009 01:30 PM
Insulating walls of old house saturn78 Building & Construction 8 07-02-2009 01:04 PM




Top of Page | View New Posts

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