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 12-24-2012, 08:32 AM   #16
AHH, SPANS!!!
 
Join Date: Apr 2012
Location: Durham NC
Posts: 1,641
Share |
Default

Insulating soffit overhang?


Quote:
Originally Posted by Develin View Post
If it's really just the floors that get cold and there isn't any damp creeping in... I'd be more inclined to put down some rugs... Saves effort and money. If the problem is damp I'd probably just rip everything and start all over again. The suggestions above about putting in new plastic soffits is pretty stellar advice... but that's just my opinion, there are plenty of viable options.

As long as there's no damp and ambient temperature is all right I don't think it's that big of a problem.

really the exterior wall envelope and the outer portion of the floor below the exterior wall needs to be insulated only, there should be no need to insulate soffits because they are not lived in. getting access to the spots that need the insulation, or insulation upgrades is most likely the biggest issue...

hand drive is offline   Reply With Quote
Old 12-24-2012, 12:44 PM   #17
Member
 
Join Date: Oct 2008
Location: Ontario
Posts: 771
Default

Insulating soffit overhang?


So there is no insulation under that 2 foot "soffit overhang"? If not, then I think you should spray foam that at the same time that you have the garage ceiling done.
One more thing to check is that the entire wall of the bedroom is insulated -- don't assume anything.
SPS-1 is offline   Reply With Quote
Old 12-24-2012, 10:24 PM   #18
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

Insulating soffit overhang?


For your location, -4" of closed-cell SPF is required in the floors; http://publicecodes.cyberregs.com/ic..._11_par002.htm

http://publicecodes.cyberregs.com/ic..._11_sec002.htm

To stop air from getting to the front wall under the shed roof, you could go with an unvented design though it requires R-15 SPF against the roof sheathing to prevent condensation; http://www.buildingscience.com/docum...rchterm=attic+ Otherwise it would be a bear to air seal. Check with local AHJ, you may need to cover it against ignition in the attic, or SPF on the front wall sheathing in the attic space. Maybe not, if completely sealed from exterior.

Personally, I would add rigid foamboard under the joists in the garage and at both soffits to stop the thermal bridging at joists and exterior ground radiation, fig.7; http://www.buildingscience.com/docum...n-crawlspaces/

1/2" would work at 33 cent per square foot, cover with 5/8" drywall, type-X per code for a garage with living space above; http://www.lowes.com/pd_101647-1722-...g|1&facetInfo=

No plastic vapor barrier required in Zone 4--- "Class I or II vapor retarders are required on the interior side of frame walls in Zones 5, 6, 7, 8 and Marine 4. " From; http://publicecodes.cyberregs.com/ic...001_par003.htm. Always check locally.

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
23" and 36" overhang for aluminum soffit jogr Building & Construction 5 05-13-2012 10:16 AM
Ventilation - Opposing gable, limited soffit + box vents = Screwed up? darlingm Roofing/Siding 1 09-07-2011 10:13 AM
Soffit install on porch overhang. homer2210 General DIY Discussions 3 06-29-2011 02:29 PM
Attic baffles but no overhang or soffit vents. Ptron Roofing/Siding 12 08-04-2010 10:51 AM
Help with installing aluminum soffit and fascia Boontucky Roofing/Siding 3 09-01-2009 07:47 PM




Top of Page | View New Posts

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