Closed Cell Spray Foam And Terminates. - Building & Construction - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 12-19-2011, 09:57 PM   #1
Member
 
gkaro's Avatar
 
Join Date: Nov 2010
Posts: 96
Rewards Points: 75
Default

closed cell spray foam and terminates.


All,
building an extension on piers /sonotubes. About a foot off the ground. I need to insulate from the top down cause it is too low to do it after.
I've laid 1/2 " pt plywood between every joist at the bottom. I plan on spraying 2" of closed cell on top of the ply and filling the rest with bats.
Does the spray foam pose a hazard here with terminates?

Advertisement


Last edited by gkaro; 12-20-2011 at 07:52 AM.
gkaro is offline   Reply With Quote
Old 12-19-2011, 10:02 PM   #2
Member
 
Msradell's Avatar
 
Join Date: Sep 2011
Location: Louisville Kentucky
Posts: 1,315
Rewards Points: 776
Default

closed cell spray foam and terminates.


Not sure about the termite issue but it would seem like they would attack the plywood first anyway. Says you're going to setup to use spray foam why not fill the entire cavity with it? Certainly provide better insulation in the long run. Posting your location would also help us provide better answers.

Advertisement

Msradell is online now   Reply With Quote
Old 12-20-2011, 07:47 AM   #3
Member
 
gkaro's Avatar
 
Join Date: Nov 2010
Posts: 96
Rewards Points: 75
Default

closed cell spray foam and terminates.


Seems odd I know. Cost.
4" of closed cell spray here cost about 4/sq.

Getting the air barrier with foam and the rest of the R with bats is the overall best $ method.
gkaro is offline   Reply With Quote
Old 12-20-2011, 08:06 AM   #4
Member
 
Join Date: Jul 2011
Posts: 971
Rewards Points: 764
Default

closed cell spray foam and terminates.


Terminates? Termites sent back in time to kill John Connor? That works.
mikegp is offline   Reply With Quote
Old 12-20-2011, 08:27 AM   #5
Member
 
gkaro's Avatar
 
Join Date: Nov 2010
Posts: 96
Rewards Points: 75
Default

closed cell spray foam and terminates.


Darn auto correct...
Haha
gkaro is offline   Reply With Quote
Old 12-20-2011, 10:54 AM   #6
Member
 
AGWhitehouse's Avatar
 
Join Date: Jul 2011
Posts: 1,378
Rewards Points: 500
Default

closed cell spray foam and terminates.


carefull putting a closed cell foam barrier on the exterior of the envelope. 2" thickness of 2.0lb closed cell is a class II vapor retarder. If you do that, make sure not to provide one on the interior side or you'll be creating a double barrier system.
__________________
Life's too short...so enjoy it!
AGWhitehouse is offline   Reply With Quote
Old 12-20-2011, 12:31 PM   #7
Member
 
gkaro's Avatar
 
Join Date: Nov 2010
Posts: 96
Rewards Points: 75
Default

closed cell spray foam and terminates.


That's what I thought as well. My inspector IS asking for poly on inside as well. Not sure of the process to dispute. These guys want you to admit that 2+2 is 5
gkaro is offline   Reply With Quote
Old 12-20-2011, 09:02 PM   #8
Member
 
AGWhitehouse's Avatar
 
Join Date: Jul 2011
Posts: 1,378
Rewards Points: 500
Default

closed cell spray foam and terminates.


read up on your local code. In CT code allows for the vapor barrier to be located at the exterior of the assembly only if there is a continuous layer of R-10 foam insulation. If there is not a continuous layer then you will need to provide a vapor barrier at the interior of the thermal envelope and provide only enough foam to create an air barrier and NOT a vapor barrier.
__________________
Life's too short...so enjoy it!
AGWhitehouse is offline   Reply With Quote
Old 12-20-2011, 10:22 PM   #9
Member
 
gkaro's Avatar
 
Join Date: Nov 2010
Posts: 96
Rewards Points: 75
Default

closed cell spray foam and terminates.


What would continuous mean. Is spraying between studs continuous or does the "break" at each stud break that continuity?
Thanks for your help.
Any Canadians familiar with the Ontario code for this issye, id like your input.
Thanks
gkaro is offline   Reply With Quote
Old 12-21-2011, 10:05 AM   #10
Member
 
AGWhitehouse's Avatar
 
Join Date: Jul 2011
Posts: 1,378
Rewards Points: 500
Default

closed cell spray foam and terminates.


Quote:
Originally Posted by gkaro View Post
What would continuous mean. Is spraying between studs continuous or does the "break" at each stud break that continuity?
Yes, studs or joists are considered breaks. Think of like putting a layer of foam on the outside of a wall before putting up siding. Same would apply for a ceiling or floor system.

Advertisement

__________________
Life's too short...so enjoy it!
AGWhitehouse is offline   Reply With Quote
Reply


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





Top of Page | View New Posts