Wide gap between mudsill and foundation
I am in the process of air sealing and insulating the rim joist area in my crawl space. I’ve already caulked in each of the bays and am about it install XPS and seal around with canned spray foam.
While crawling around I noticed that the mudsill is anywhere between 3/4″ to 1 1/4″ off of the top of the foundation wall. There are shims spaced out all around, some of which are degrading.
The main section of the house (with a full basement) was built in 1976 and the addition with the crawl space I am in was probably done sometime in the 80s. We moved in about 3 years ago.
Is this normal? Is there a need to fix this and add some structural support? Or is it OK to just use canned spray foam between them?
Thank you very much!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part