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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-10-2012, 02:08 PM   #1
Member
 
Join Date: Oct 2009
Location: Indiana, PA
Posts: 1,304
Rewards Points: 506
Default

Insulating attic wall shared with living space


Try this again... tried to post this 5 times today every time it fails...

anyways..


I have a house constructed in 1996 which is 2 stories, and then it has a 1 story master suite which has attic space from a gabled attic that butts up against the house (standard gable attic, triangular ends against the houe and to the outside)

this wall that the attic butts against is not insulated, not sure why, but its not and of course its cold in the winter against that wall. the inside is completely finished and drywalled, the attic wall is just studds and you can see the inside drywall (2x4 studds in this part, nut sure why, the rest of the houe is all 2x6 *shrugs*)

I want to insulate this wall with roxul insulation to get a little more r-value then fiberglass, in addition to the sound deadening and increased firestopping you get with roxul.. but of course roxul has no vapor barrier

do I need a vapor barrier here? I assumed yes since its unconditioned attic space touching conditioned space, but then none of my ceilings have vapor barriers.. (I live near pittsburgh, pa so not sure what our region wants / requires)

if it does have to have a vapor barrier, what do you suggest? I don't want to go fiberglass, and cellulose would be in the same category as roxul for the vapor retarder

__________________
House Information: Build 1996, 1500 sq ft basement, 1500 sq ft 1st floor, 800 sq ft 2nd floor, 560 sq ft unfinished attic space on 2nd floor. Insulation: Attic blown fiberglass, walls R-19, Basement R-19. HVAC: Trane xc95m fully modulating furnace, single zone, Trane XL20i commiunicating AC unit, TCONT900 Communicating thermostat.
BlueBSH is offline   Reply With Quote
Old 07-11-2012, 06:06 PM   #2
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 6,585
Rewards Points: 2,460
Default

Insulating attic wall shared with living space


Picture would be very helpful here, however, the general answer to your question would be no.

Vapor barriers are overused and largely unnecessary in most of the climate regions.

Windows on Wash is online now   Reply With Quote
Old 07-12-2012, 11:04 PM   #3
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Rewards Points: 2,000
Default

Insulating attic wall shared with living space


"do I need a vapor barrier here? I assumed yes since its unconditioned attic space touching conditioned space, but then none of my ceilings have vapor barriers.. (I live near pittsburgh, pa so not sure what our region wants / requires)"-------------------

You are in Zone 5, Fig.#3: http://www.buildingscience.com/docum...nd-wall-design

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
Adding Floor & Living Space to Attic Over Uneven Joists ziggy138 Building & Construction 18 02-06-2012 01:38 AM
Utility light in attic space sheslostcontrol Electrical 13 02-25-2011 12:40 PM
Insulating block exterior plumbing kitchen wall desrtrat Building & Construction 4 12-16-2010 06:51 PM
Running speaker wire from attic into exterior wall: Techniques? homerb Home Theater 1 07-15-2010 01:55 PM
Insulating wall when running Copper Tube lines to an exposed wall face scubber Carpentry 5 04-13-2009 10:23 PM




Top of Page | View New Posts

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