XPS insulation and fire blocking advice needed.
dgeist
8 years ago
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dgeist
8 years agolast modified: 8 years agoRelated Discussions
XPS Insulation Questions
Comments (3)Worthy, thanks for posting, I have read a lot of your replies and you seem to know your stuff. I was thinking the spray foam was best, but just wanted to make sure it would make a good seal between the concrete and panel. Reading your link, it seems like the best way to do the rim joist is to cut a piece of XPS that will fit up in there and foam it all the way around. I imagine I will just reuse the FG and throw it back up. After reading your other posts on the bottom plate, I was planning on doing the XPS underneath that already. Thanks for the reply...See MoreXPS and fire blocking
Comments (15)Very nice pdf picture. If adding that vertical strip of drywall to the insde of a 2 X 4 every 10 or so feet really can make a difference, what the hell, it easy enough to do. Now real way to do that with a continuous run of XPS though. Now, the horizonatl stuff looks like you essentially need to cut a stip of drywall large enough to cover the 2 X 4 + the depth of your XPS and add between to the top. I assume, technically, the areas I am not framing but rather attaching drywall right to the XPS really should be capped with a skinny strip as well...I'd need to think of how to attach it and if it really would be worth it....I guess it depends of how level I cut XPS....or I might even have enough room to lay a 2 X 4 over the xps and rest the other half on the concrete, maybe some more foamseal underneath...not sure how I'd attach it....sounds like there is little bang for the buck if there is a fire though!...See MoreXPS / Fire / Overkill
Comments (7)Yea, I am overthinking it....eventually an electrical inspector will come in. If he says I should have or need a framing inspection I wanted to be up to snuff...and safe. I really should have just got the permit and rules from the get go and taken my chances with the taxes and crazy rules. As far as the slotted XPS over concrete, held up by the fur strips in the slot and the drywall over that.....it was very simple to do EXCEPT in some areas where the walls bow in or out. I had to shim here and there when putting up the drywall. Note too that you only get around an R9. The living areas I am studding out in front of the XPS and adding R13 fg. All closets and my storage room though are simply the XPS. Over all it will be way more insulated than before I started and I save an extra 4" space or so in those areas....See MoreInsulation question - fiberglass only or fg plus xps
Comments (5)Hi Worthy, Thanks for your detailed response. Sorry I've been slow to follow up but the day job gets in the way... My contractor just began digging for the crawl space today (I'll post a question about that separately). Since we already have approved plans, I wasn't sure if using the XPS in place of sheathing will fly with the county, but the contractor is also concerned with applying the hardy board siding over the foam. He says because of the weight of the siding and the softness of the foam it creates problems. He is suggesting we put the foam between studs and also suggests we consider spray in foam. Thoughts on any of this? I think the cellulose for the cathedral ceiling in particular is a great option. We'll look at the non-vented tight packed option. Thanks again and any other thoughts are welcome....See Moreworthy
8 years agolast modified: 8 years agodgeist
8 years agoworthy
8 years agodgeist
8 years agoworthy
8 years agolast modified: 8 years agoMatthew
8 years agodgeist
8 years ago
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