The renovation had a very reasonable brief: keep the comfortable old tub, replace the gloomy tile. Ben even likes the slightly dated colour. The surprise is not the tub. It is the damaged board at its back edge, which turns a cosmetic refresh into a more careful repair.
Keep the tub for the right reasons
Inspect for cracks, corrosion where applicable, worn surfaces, movement, and previous patching. Have the drain and overflow checked while access is available. A tub worth keeping should suit how the household uses it, not merely be difficult to carry down the stairs.
If replacement becomes necessary, compare the everyday access and cleaning tradeoffs of freestanding and alcove tubs before choosing the new layout.
| Check | Why it changes the decision |
|---|---|
| Tub edge or tiling flange | The new waterproofing needs a compatible, continuous connection. |
| Support and movement | A moving tub can stress the surrounding joints. |
| Drain and overflow access | A small plumbing issue may be much harder to reach after the wall closes. |
| Damage behind the old surround | Repair scope depends on what is actually found. |
The waterproofing has to meet the tub
MAAX's bathtub guide distinguishes tub configurations and flange options. Identify what your existing tub actually has. Then have the installer show how the selected waterproofing system connects to it. A bead at the visible tile edge is not a substitute for a complete detail behind the finish.
If the connection cannot be made reliably, keeping the tub may be false economy. Do not cut away an essential flange to make new board sit neatly. The right detail depends on the tub and wall system; our shower waterproofing guide explains the broader assembly choices.
Write a small scope with an honest unknown
- Specify protection of the retained tub during demolition and tile work.
- Agree how concealed damage will be photographed, priced, and approved.
- Keep a decision point after exposure and before rebuilding the surround.
- Confirm who tests the plumbing and checks the finished joints before handover.
For older finishes, arrange appropriate hazard assessment before disturbance. The renovation dust guide explains why ordinary dust protection does not address every legacy material.
Ben's project kept the tub, but we paused with the surround open so the damaged backing and the flange connection could be assessed together. We protected the tub with a secured cover and kept checking beneath it for grit; demolition debris can scratch a good surface through a careless cover. The owner approved the extra backing repair before rebuilding began. The saving shrank, but keeping his comfortable tub still made sense.
If new shower controls are part of the refresh, identify the existing valve before buying trim. A finish change can become a larger plumbing job when the parts are incompatible.