I'm in the process of insulating the rim joists in my house, and have noticed that my home's joist setup is different from what i've seen in pictures and guides online. (see picture)
Basically the joists are embedded nearly 3/4 of the way into cement along the tops of the basement walls.
Is it a problem to have that chunk of cement in between the joists sealed in air tight with pink rigid foam? I'm thinking that due to cement being porous, it could wick moisture in there that wouldn't get a chance to dry.. am I way off with this?
The wood above the cement in the pic has water marks on it, but i'm 99% sure it's from when the house was constructed (1979), practically all the joists, and even sub floor have water marks and even chunks of grass and dried mud. Plus the rim joist is located a bit more than 2.5 feet above the ground.
Any suggestions are much appreciated.