Spray Foam Roof Underside Or Between Ceiling Joists - Insulation - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


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

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

Like Tree3Likes
Reply
 
Thread Tools Search this Thread
Display Modes
Old 07-11-2019, 11:00 AM   #16
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 38,079
Rewards Points: 768
Default

Re: Spray Foam Roof Underside or Between Ceiling Joists


Quote:
Originally Posted by RustyRealtor View Post
I like the foam board idea. If I use four 2" pieces of the pink stuff I would have R-40 above the Pex. I just need the inspector's blessing. Then I will use rolled or blown-in insulation everywhere else. And I will spray foam the inside of the brick walls and leave the roof decking uninsulated

I think Yodaman's video concludes that a ridge vent is the way to go. But I don't have overhangs, so I'm not sure how to get air into the attic - especially with gutters. It used to said, by some, that ridge vents and gable vents don't work well together. Any thoughts on that? We dont have much snow in these parts,
If you had a new roof in the near future, there are drip edge vents smart vent that go just under the first shingles. I have seen a row of box vents but that doesn't look good on the front of a house. Maybe some gable vents but low triangles close to the soffet at the corners. Just above the insulation.


We have been building houses with in 6 ft of each other. That puts the gutters 5 ft apart then we can't have vented soffet. so they wrap a skirt roof around the front and back and that is where the venting comes from.
I'm not sure it works but that is what they want. What ever you do, you want more low than what you have up high.
__________________
Do not use flat bottom gables with scissor trusses.
https://www.fema.gov/media-library-d...6/chapter7.pdf
figure 7-14
Nealtw is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-11-2019, 11:26 AM   #17
Property Mgt/Maint
 
Join Date: Mar 2015
Location: Upstate NY
Posts: 6,496
Rewards Points: 24
Default

Re: Spray Foam Roof Underside or Between Ceiling Joists


There are shingle vents that could be installed for intake vent, but like Neil said, it is best if done during a re-shingle project.


There are several MFG's that make them. Lomanco, and Certainteed come to mind.


Combined with pan vents or spinner vents for exhaust could solve your issue.
__________________
[political signature removed]
Yodaman is online now   Reply With Quote
Sponsored Links
Advertisement
 
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





Top of Page | View New Posts