Insulating rim joist – is canned Great Stuff acceptable? – GreenBuildingAdvisor

In Climate zone 4A, as part of a renovation I had my GC remove fiberglass insulation between an unconditioned basement and first floor addition above it. Probably about a 25×10 area as it’s a separate basement from the rest of the house.

I had specified 3 inch depth open cell insulation on the rim joist to replace it, (as there is extensive plumbing in this basement and I was hoping to no longer rely on heat tape wrapped around all the pipes by a previous owner to prevent freezing), but the workers started using Great Stuff Gaps & Cracks to fill all the bays before I noticed.

The wall assembly has R2.5 Dow Styrofoam board on the exterior down to just above the foundation. This is an 110 year house and the framing is at least 60-70 years old in this area, it seemed like there is no capillary break and I assume the bottom plate may not be treated. The framing is using old rough cut 2x4s. At least parts of the plate are elevated above the foundation on shims, so not in direct contact.

I’m concerned the closed cell Great Stuff may prevent interior drying and the external Styrofoam may prevent exterior drying, leading to rot in the sill plate or rim joist in the future. Is this a significant concern – should I insist the contractor somehow remove the Great Stuff and have their insulation subcontractor redo it with the open cell when they come to do the other insulation?

Or am I overthinking it and the Great Stuff is fine (or perhaps even better since it has a better R-value than open cell)?

(The picture shows a piece of fiberglass embedded – this is only in a couple spots where they failed to remove it fully, I’ll be asking for this to be fixed for sure since I know fiberglass against the rim is a no-no)