My sill plate is getting wet. I have a 6 foot overhang so rain is not getting to it. Im trying to figure out how to deal with it. The sill is not pressure treated unfortunately. The foundation is cement blocks and the sill plate doesnt cover the opening of the blocks which i asume is a good thing allowing the space to vent. The problem is only in the corners.
I was thinking of installing foam around the outside of the sill plate overlaping the foundation. The thought is that it would create a moisture barrier and insulate it at the same time. I have access the the sill plate outdide the house if i pull off some wood trim relatively easily.
Does that make sense?
Im worried about installing foam inside since it would trap the moisture against the wood and make it worse?