If its not exposed much for appearance, cheap architectural, sub-floor adhesive prevents squeaks on 2x8 sub-floors and sticks to everything. High VOC types dryfast but are obsolete so the LePages PL * Polyurethane bond in a large tube may take a day get firm and few days to harden like ABS.
apply with a caulking gun.
extremely durable to everything and ...
It is hard to tell if the floor has rot or if that is just mold.
If this is just mold confined to the top layer of your osb and the osb seems structurally sound I'd probably:
wear a mask, turn the fan on, get a bucket of bleach water and some shop paper towel, wear gloves, aggressively scrub the area with shop towels. I'd probably get a plastic wire brush ...
paint the mold with Javex and ventilate room with open window until white and dry, the. Scrape residue to hard clean surface, vacuum clean up and seal tub well.
Ensure tile grout is seal coated for moisture resistance.
Then get 2 more quotes.
SLC is typically rated for install overtop of L/360 floors. Assuming your glued down laminate is well adhered to the substrate below it and that substrate is a minimum of 1.25" thick (almost no wood floors are), then the SLC would be approved for that purpose. The two SLC I am most familiar with are Sika and Mapei.
I've installed SLC on 5/8" tng ...
Good answers above, but have you considered self leveling compound? That would get things pretty close to flat.
(And if you do go with the concrete grinding, do yourself a favor and get a dust management shroud and a capable vacuum. They make a huge difference.)
One half millimeter seems really small, and well within many of the requirements for flatness from the flooring suppliers. I do not do conversion on the fly very well, but most flooring makers want a floor flat enough so that if you use a good straight edge, any where from 8 to 10 feet long and if you balance the straight edge over a presumed high spot, the ...
I would use an angle grinder with a concrete surfacing disk.
These have carbide or diamond embedded blocks and will really clean up high points in a floor. Any bumps will affect the floor and the area around it.