Knee Wall Insulation - Building & Construction - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 09-30-2009, 11:18 AM   #1
Join Date: Sep 2009
Posts: 1
Rewards Points: 10

Knee Wall Insulation

I have a 1.5 story house with knee walls in the finished attic that has faced r-13 insulation in the 2x4 frames

My plan is to keep the current insulation in place and then use r-19 unfaced insulation and install it horizontally attaching it to the wall frames. Since I use the attic for storage, I will wrap everything in tyvec (or other house wrap material).

Does this seem like a good plan?


nebaggie is offline   Reply With Quote
Old 09-30-2009, 09:26 PM   #2
mpepin's Avatar
Join Date: Nov 2008
Location: Frederick, MD
Posts: 29
Rewards Points: 25

Knee Wall Insulation

Sounds like it would work fine. Make sure you have a plan to insulate the sloped ceiling as well as the floor framing beneath the kneewall. If you only insulate the kneewall, the overall effectiveness will be limited.


mpepin is offline   Reply With Quote
Old 09-30-2009, 09:51 PM   #3
Registered User
Join Date: Mar 2009
Posts: 10,718
Rewards Points: 3,502

Knee Wall Insulation

I think the house wrap would compress the new insulation, losing some of it's R-value, especially when it sags. As stated by mpepin, insulate the floor 12"under the knee wall, add a cardboard baffle (under the wall in each ceiling joist bay) to stop any conditioned air movement to the attic space there.
Be safe, Gary
Gary in WA is offline   Reply With Quote

Thread Tools
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
Knee wall Ventilation advice needed N8E Roofing/Siding 9 06-28-2008 11:23 PM
no insulation behind wall boddah Remodeling 1 03-25-2008 03:11 PM
Survey Results - Cavity Wall Insulation - Health Concerns mchu6am4 Building & Construction 5 03-14-2007 02:50 PM
Knee Wall Not Level cibula11 Building & Construction 14 03-10-2007 05:08 PM

Top of Page | View New Posts