I apologize if this is in the wrong forum. The caulk around our shower drain would not set, so in investigating why, I unscrewed the shower drain and discovered a wet sandy mix underneath. I’m not sure if it was unset concrete or a different type of mixture, but I cleaned it out and don’t know what to do next. I’m guessing our builder may not have done something right. The void extends underneath the tile from about 1 to 2 inches around. We’re currently letting it dry out. Is this patchable? What should we fill the void in with exactly and can we pack it in underneath the tile? Also, the drain is threaded and the pipe coming from the ground is not. It looks like they used some adhesive to try and seal the two together. Is it possible to make this kind of connection secure? Thanks. [ATTACH]2609[/ATTACH][ATTACH]2610[/ATTACH][ATTACH]2611[/ATTACH]

My problem is that my contractor did not read or care about what the manual for my tub said, and only did the bare minimum to install my acrylic tub. This meant just shoving two small wedge-shaped wood pieces for shims on the apron side (the tub comes with a plywood platform underneath and two wood block legs in the corners on the side opposite the apron, for support). The manual specifically says not to shim under the apron (aka "skirt") side to level the tub, but to shim underneath the wood legs. Currently, the tub is making creaking noises near the drain side, and clearly requires support. What I'd specifically like to know at this point, is if its possible to fix this support without removing the tub - which would likely necessitate tearing down and rebuilding the three walls of tiles surrounding it. (I would like to avoid a major re-do for obvious reasons). There are two access holes, one behind the drain end, one on the opposite side of the apron. I believe the shim near the drain can be removed by hand, since it is near an access hole. However, the shim on the far side can not. So is it possible to undo the installation of this shim, without raising the tub?? For the added support, I plan to ask my contractor to install a dry mix of mortar in plastic bags under the center of the tub, and surround that with expansion foam. This, on the recommendation of the manufacturer. I'm not sure how feasible this will be of course, since the mortar has to be pushed through the access holes.