Spray-Foam Insulation for Exterior Wall and Ceiling
Hi again everyone. I’m to the point in my 1970 house complete remodel where I need to start planning insulation. I’m in climate zone 6 in northeast Ohio, my home has 2×4 exterior walls that are sheathed in something called flintkote which is about 1/2in thick. It’s like a Fiberous type material that I’m sure some of you are familiar with. There’s about about a 3/4in cavity outside of the sheathing in between the nailers for the cedar siding on the outside. My plan was to use the froth pak 200 kit I bought and picture frame spray and batt the interior of my wall cavities. I got kind of spooked with the chemical concerns with spray foam and also the moisture accumulation that could happen on the face of the foam in the winter (it didn’t seem like I’d be able to get a very narrow bead with the sprayer). I’ve since decided to use the can foam to cover all gaps and protrusions for an air seal using as thin of a bead of foam as possible to avoid condensation building up on it in the winter. I was planning on using r-15 Rockwool and covering everything with the certainteed MemBrain barrier/retarder. Is this a solid plan and what would you do differently if not. Thanks.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part