Tape vs caulk vs foam for sealing sill plate on interior
Old 1908 house. I’m installing interior insulation to the concrete block foundation. Going to cut and cobble the rim joists. Should I just keep it simple and use a Big Stretch or other high quality caulking for the sill plate to foundation wall junction? Or 1 part pro gun spray foam? Froth pak only? Or can I use a high performance tape? Do I go top of the line like Siga Fentrim or what about 3M all weather flashing tape 8067?
I’ve got bulk water managed for the foundation wall. I’ll be using 2″ high density XPS (bought out of convenience for the good price not necessarily needing the high density). Covering with 7/16th OSB, will seal the seams. I thought about just doing spray foam for the wall insulation top face all the way up to rim joists but I should have plenty of leftover rigid foam insulation and actually doubling up on it to 4″ of the rim joists should actually get me right about to the surface of the walls after OSB. Just wasn’t sure how to address the sill plate (no sill gasket back in 1908) to foundation wall joint.