Bummer. Are you going to have to move everything to fix the stuff below too?
would have been ideal, but I have around 300lbs live rock in that tub so we opted to reinforce the beam that is underneath the sump. The existing joist was in decent condition.
used my car jack to lift the tub and subfloor and slid a 2x6, then screwed it to the existing joist.
We then built an internal frame to replace all of the side walls and allow the shed to sit on good solid pressure treated 2x6's. A lot of car jack, pry bar, and mallets were needed to lift the shed and position the fresh joist.
Next added all new joists on 16" centers
Followed by Ground contact rated plywood sub floor with a sealed OSB floor
I then planed and sanded the "swell" of the old OSB to level the floor and to eliminate most of the rotted edge. The swell is extreme enough that there is a bit of an edge where the old meets new, I used an "epoxy filler" to try and help. I had to remind myself this is just a fish shed that adds no value to the house haha
once floor was cleaned, primed, glued.... we added our new vinyl floor (prepare yourselves)
With such a small square footage and on a very "she has that look in her eye" budget. We used the cheapest vinyl flooring that still had a high traffic and waterproof rating. $ .39 cents a foot!
Check this floor out!
aligning the pattern was a nightmare and definitely pushed her over the edge. It might be a shed, it might be cheaper flooring but
I WOULD NEVER BE OK WITH THE PATTERN BEING OFF!
another look, Still need to add the barriers around the sump to seal off spills.
I dont have pics of the drain we added to allow any massive spills to exit, but due to slope of the old driveway and the hydrophobic nature of the vinyl, water exits quite quickly.
A project that would have been 1000 times easier if done before the build, but I am glad that now we know the shed is sturdy and can handle spills all for under $275