On Oct 15, 5:12*pm, wrote:
I have a section of concrete floor (1-1/2" thick x 60 square feet)
that is fragmented and deflects slightly when I walk on it because the
5/8" plywood subfloor was inadequately fastened to the joists.
To stabilize the concrete, I'm thinking about applying a topping on
it, ideally no more than 3/8" but thicker if necessary.
Can anyone recommend a topping that's trowleable, thin,
crack-resistant/crack-proof and rigid enough to resist deflection from
foot traffic?
Thanks...


I'm guessing you've got a deteriorated gypcrete situation.....you
"might" be able repair / re-consolidate the fractured crap with a
liquid 2 part epoxy like SIKA Sikadur 35 HI-MOD, LV, LPL.

The stuff ain't cheap, comes in a 3 gal "kit".... total 3 gallon kits
yields about 700 cubic inches of mixed resin.

I'm not sure how you'd calculate or estimate how much you'd need to do
the job but a full kit would give you about 6 ozs per sq ft......

maybe enough re-wet all the cracked pieces & glue them back together?


For my money I'd remove all of it, screw down the plywood & re-pour a
new batch. A successful repair would be a long shot.

cheers
Bob