Crawl space insulation questions
I’m going to be converting my crawl space to a sealed, conditioned space. The concrete block walls will be insulated with rigid foam. I’ll be using TherMax, as I understand that unfaced rigid foam does not meet the ignition barriers of the IRC. I am also planning to use spray foam to air seal and insulate the rim joists (per Fine Homebuilding No. 189 , September 2007). Interestingly, I’ve never seen any discussions about ignition barrier for the foam for the rim joists. What’s the story here? Also, living in a moderate-to-high termite risk zone, I recognize the need to leave the top 2-3” of the block wall uninsulated and exposed, as a termite inspection strip. On the other hand , leaving that strip, as well as the 2-1/2” strip along the top of the block wall (I have a 2x6 sill plate on an 8” block wall) seems like an incomplete insulation job. Since termite inspection would typically occur no more than once a year, wouldn’t it make sense to make some sort of removable rigid foam strips to fully insulate the wall?
Posted Sat, 11/24/2012 - 16:52
Edited Sat, 11/24/2012 - 16:55
Other Questions in Building Code Questions
Best practices ideas for retrofitting existing PWF built in muskeg and best practices for foundations for new builds in muskeg (i.e. very wet !) and a severe cold climate