Go Back   DIY Chatroom Home Improvement Forum > DIY Repair > General DIY Discussions

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-03-2010, 08:22 PM   #1
Member
 
Join Date: Dec 2008
Location: Peterborough, ON
Posts: 60
Rewards Points: 0
Share |
Unhappy

Adding Insulation to Kneewall


Hi,

I am in the process of adding insulation to my knee-wall's in a 1952, war time, storey and a half home. There is existing insulation (fibreglass batts R7) on the knee-wall which I want to cover with an R-10 ridged board. I will then blow in insulation on the floor of the attic space to finish this off.

My questions are:

Am I doing the right thing?
Do I need to worry about vapour barrier?
Where should the ridged board start/finish on the wall?
Can I use Tuck tape to seal the ridged board or should I use a foam spray?

Does anyone have any pointers/ideas to help me along?

All responses are welcome. Thanks Shorteared

shorteared is offline   Reply With Quote
Old 10-04-2010, 07:48 AM   #2
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,148
Rewards Points: 50
Default

Adding Insulation to Kneewall


The batts need to breathe. I would just upgrade them to R-15, and forgive the rigid foam board.

gregzoll is online now   Reply With Quote
The Following User Says Thank You to gregzoll For This Useful Post:
shorteared (10-04-2010)
Old 10-04-2010, 03:24 PM   #3
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Rewards Points: 0
Default

Adding Insulation to Kneewall


The baffles at the soffit protect the insulation from wind-washing, the foam board extends up to the baffles at the knee wall to protect the sloped cavity insulation from w.w. there. If no blocking under the knee wall, extend the board into the joist bays to stop air there: http://www.buildingscience.com/docum...archterm=insul

http://www.homeenergy.org/archive/he...95/950309.html

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
The Following User Says Thank You to Gary in WA For This Useful Post:
shorteared (10-04-2010)
Old 10-04-2010, 06:41 PM   #4
Member
 
Join Date: Dec 2008
Location: Peterborough, ON
Posts: 60
Rewards Points: 0
Default

Adding Insulation to Kneewall


Thank you GBR in WA,

The website you provided (http://www.homeenergy.org/archive/he...95/950309.html) helped out a lot in understanding junctions, Now that my head is wrapped around this it is time to install the insulation. I appreciate your time and efforts. Shorteared
shorteared is offline   Reply With Quote
The Following User Says Thank You to shorteared For This Useful Post:
Gary in WA (10-05-2010)
Reply

Tags
adding, insulating, knee wall


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 insulation and storage to Cape Cod Side Attic turin39789 General DIY Discussions 5 11-08-2010 10:50 AM
Adding Attic Insulation barneyrubble Building & Construction 2 08-23-2010 01:50 PM
adding attic insulation to existing insulation strouddljs General DIY Discussions 4 11-09-2009 05:06 PM
Adding attic insulation pomelo Building & Construction 3 10-22-2009 05:19 PM
Adding insulation to only a portion of an attic? curls00 Building & Construction 22 10-27-2008 09:41 AM




Top of Page | View New Posts

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