I'm wondering if anyone has any thoughts or experience with this.
I'm rechinking a small old log cabin using Sashco chinking with trapezoid foam backing strips. I've chinked the exterior and realize that since the logs have mostly pretty wide gaps between them (1-2" on average), the inside space between the exterior and interior backing strips will be substantial.
So I'm thinking of using Great Stuff canned foam to fill the inside gap between the stips.
I read somewhere that one should keep this space empty, but I don't know why that would be important. It seems like overall insulation would be helped tremendously if I used the spray foam.
I'm thinking that if anything, the spray foam (closed cell) would keep any moisture (from the logs) from condensing in the otherwise open space. (Additionaly, the foam is flexible, allowing for any log swelling/contraction.) But maybe I'm missing something.
Any thoughts out there on this one?
Thanks a lot,