The floor around the drain is gone.the flange has nothing to screw into I can see through to the basement,. it seems part of the floor is gone . What can I do without placing a new floor?

Replacing at least a small portion of floor is best, but you can also use some two by fours on the bottom side of the floor to give you something to secure the flange to. Use some shim or just cut some small pieces of wood to fill the gap between the bottom of the flange and the 2x4s so the flange will be set on a sturdy foundation. Hope this helps.

Replacing at least a small portion of floor is best, but you can also use some two by fours on the bottom side of the floor to give you something to secure the flange to. use some shim or just cut some small pieces of wood to fill the gap between the bottom of the flange and the 2x4s so the flange will be set on a sturdy foundation. Hope this helps.

Thank you... I will try.

Hi all:

I'd start by examining the subfloor from underneath... just how bad is the floor on the underside? If not too bad, then I'd recommend using plywood on the underside of the floor. Use screws that grab through the plywood and the subfloor only... O.K? Plywood will not split when screwing into or over time as people rock that toilet back and forth... ;)

Then you can go upstairs and screw the toilet flange in using zinc or similar corrosion-resistant screw(s). Set the toilet and check for leaks.

Good luck!

Mark