I have a contractor coming to replace the old tile around my shower, but I'm planning to keep the tub since it's in good condition. I've been feeling a bit anxious about the process because I don't quite understand how they'll waterproof it if the tub stays in place. Most of the videos I've seen start with everything being removed before waterproofing, but I live in a condo and fear water damage. I'm wondering if it's possible to remove the tile while leaving the tub undisturbed and how the new waterproofing will seal the area where the tile meets the tub to prevent leaks. The contractor mentioned that the seam and any screws would be caulked and that the backing board would be waterproofed on both sides, but I'm concerned if that's really enough to prevent issues.
1 Answer
When it comes to waterproofing, the key point is that the waterproofing should extend over the tub's mounting flange. Typically, the tub is left in place so the waterproofing can properly run down the wall over the flange. In all my remodeling projects that only involved wall tiles, I’ve never had to remove the tub. If the contractor is caulking the seams and using waterproof backing boards, you should be in a good spot. Just make sure they do it correctly to avoid any leaks later on!

This is really helpful, thanks!