I am not an inspector or a professional in this trade, I am the homeowner. I looked around the site to see if there were posting rules about non-professionals or non-inspectors posting as some sites do have those rules. So I hope it’s ok that I ask.
My house is a 2-story Cape Code modular home, built in 1988. We bought it in 2011. Despite having been through 3 previous owners, to this day the second story is still completely unfinished, and apparently it was built as an attic space with stairs, ceilings are 7.5’ in the center. By unfinished I mean no wiring, mechanical, framing, not even insulation when we moved in. An empty shell.
I’m wanting to finish this space and put 2 bedrooms and a full bath up there. I am going to pull the permits and have been trying to get a hold of our inspector but he hasn’t gotten back to me yet regarding this issue: the overspanned floor joists are 2x8, spanned 14’ and…24" on center. The span starts in the middle load bearing wall and goes 14’ out each side to the exterior load bearing walls (house is 28’ wide). The distance from the center to the knee wall is 7.5’ each way. The floor isn’t bouncy, I suspect it’s probably because all the usable/livable interior space is within the first 5-6’ of the span.
I want to know if the inspector is going to require these joists to be sistered. Right now I’m ripping up the OSB as it was installed very poorly and incorrectly and will install a new subfloor properly with good materials. The time to sister the joists would be now if required. The only other caveat is I had the second story spray foam insulated, so near the eves the floor joists disappear into about 10-12 inches of open cell foam. I’m not excited about having to rip some of that out to install another joist and break the barrier, but will do whatever is right and necessary nonetheless.
Thanks for your time.