Foundation insulation choice
dgibbon13
| Posted in General Questions on
Hi there I’m located in southern. Ontario. I’m renovating my basement and trying to make a choice here for insulation.
For 2″ GPS board at r10 is $55 per sheet (ouch). This one is rated as a vapor barrier. (less then .5 water vapor permeance) no poly needed
The next one is 1″ gps (graphite EPS)
R5. $25 per sheet. I would need a vapor barrier (poly) as it’s not 2 inches. Same water permeance
Plan on doing 2X4 studs with roxul
The foam would be butted right to my foundation with glue then studs then roxul. Thanks
Any thoughts??
Thank you
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Replies
dgibbon13,
I'm not that familiar with the OBC. Is the o.5 perms a code requirement, hence the poly?
Why not just go with a specific basement product?
https://www.insofast.com/
https://dricore.com/products/smartwall/
Yeah , if the vapor permeance is low enough (.5) it's enough to exclude a vapor barrier. When you get into stuff that's like 3-5 you need a barrier on top of that. I'm just having a hard time with is it worth like triple the cost for another inch with an additional r5 or just go r5 lower and save. A pile of money
I'll save you $5 per sheet already on the 1" at $25 and the 2" at $55.... :)
You guys are lucky to have GPS. I could only find SilverBoard. No distributor of other GPS would ship to me.
Haha it's actually 27.50. It's exact half the cost lol. I just double checked. Whereabouts are you located?