People always say that Hell is “below”, I just never realized it was right below the floorboards.
We all know how many holes can be drilled through the sills and in the field for wiring and piping runs, without (traditionally) even a feeble effort made to seal them…. The house pictured below must have had a couple of hundred (including abandoned holes or "misfires" with nothing even going through them). The big cutout around the shower drain in this house sure helps this home’s bathtub cool off extra fast.
The sub-floor was subsequently done in closed-cell spray foam. All seemed well until I followed behind the foam installer to verify that he provided the contracted thickness (and he had a heads-up ahead of time that I’d be checking). The nail in the third photo is two inches long (the contracted foam thickness) and touching the subfloor. While much of the floor has the expected two inches (and some more than that), it is not hard to find areas with less. Hard to estimate the weighted-average thickness….
Any opinions out there on a reasonable/acceptable degree of variance in thickness for spray-foam applications on subfloors?
Incidentally, conditioned crawlspace wasn't pursued because no one in this rural area could be found who has done one before, heavy soil moisture much of the year, and the local heating contractors have a hard time doing even conventional work correctly.
(oh, and the ducts are laying on the ground while waiting for the foam contractor to come back and review the issues…..)
Yet more evidence that Kermit was Right.