A bathroom that fails between its first and third year almost never failed because of a cheap tile — it failed because a stage was skipped or a cure was rushed. Bathroom renovation is one of the most sequence-dependent jobs in a home: get the order and the waterproofing right and it lasts a decade; get them wrong and water finds the slab, the bedroom wall or the flat below. Here’s how a bathroom renovation actually proceeds in a Thane flat, stage by stage, and the factors that drive what it costs.

The stages, in the order they must happen

1. Demolition and chasing. Old tiles, fittings and (where needed) plaster come off, back to a sound surface, and wall chases are cut for any new plumbing and electrical routes.

2. Plumbing and electrical rough-in. Supply and drainage lines are positioned for the new layout (CPVC/PPR), the geyser circuit and exhaust and lighting points are run, and a wall-hung WC’s in-wall cistern is set now — not retrofitted later.

3. Waterproofing — and its cure. A two-component polymer-modified cementitious membrane goes on the floor and up the wet walls (full height on the shower wall), with fibreglass mesh at the floor-wall junction and every penetration wrapped. Then it cures for 48–72 hours before any tile work. This is the stage we never compress; the full reasoning is in our pre-monsoon home waterproofing guide.

4. Slope and tiling. The floor is laid to a 1–2% slope toward the drain on the wet bedding, checked with a level, then floor and wall tiles go on with the correct spacers and grout — epoxy grout in the wet zone. Tile selection sits with our flooring and tiles work in Thane scope.

5. Sanitaryware and CP fittings. WC, basin, vanity, shower, diverter, health faucet and accessories go in last, matched to the finish.

6. Snag walkthrough. Drainage, slope (no standing water), fittings and finish are checked on site before handover.

Strip-back or tile-over-tile?

Two routes: a full strip-back to the slab (the right call for older Thane flats, CIDCO-era buildings, or any bathroom showing salt deposits on the outside wall, because it lets the waterproofing be redone properly), or a tile-over-tile refresh (faster and less messy, but only suitable when the existing waterproofing is genuinely sound and the floor can absorb the height rise). Choosing tile-over-tile to save time on a bathroom that needed a strip-back is how leaks return after the new finish.

How long it takes

A standard bathroom with a full strip-back runs about 12–18 working days at the right pace, including the waterproofing cure; a tile-over-tile refresh is quicker at roughly 7–10 days. Any quote promising a standard strip-back in 5–7 days is cutting the cure — the one corner that can’t be cut. The rest of the flat stays usable: the bathroom is sealed off with dust sheets and debris is cleared daily.

What affects the cost

The cost of a bathroom renovation is driven by the strip-back extent, the waterproofing scope, the tile choice and area, the fitting brands (Jaquar, Kohler, Cera, Hindware and similar, each with budget-to-premium lines), the vanity and mirror, and any concealed plumbing correction found after demolition. Rather than a single number, it’s worth seeing where the money goes — our bathroom renovation cost in Thane guide breaks down the budget by component and bathroom size. For a design-led upgrade rather than a strip-back fix, see bathroom design in Thane.

How to start

Decide strip-back vs tile-over-tile honestly (a site visit and a tap/level check will tell you), insist on a quote that names the waterproofing system and the fitting brands, and protect the cure time above all. To plan against your actual bathroom, our bathroom renovation in Thane work starts with a free site visit and a written, itemised scope.

Frequently Asked Questions

What’s the correct order for a bathroom renovation? Demolition and chasing, then plumbing and electrical rough-in, then waterproofing with its full cure, then slope and tiling, then sanitaryware and CP fittings, then a snag walkthrough. The waterproofing cure must come before tiling.

How long does a bathroom renovation take in Thane? About 12–18 working days for a full strip-back including the waterproofing cure, or roughly 7–10 days for a tile-over-tile refresh. A 5–7 day strip-back quote is cutting the cure.

Do I need a full strip-back or can I tile over the old tiles? Tile-over-tile suits a bathroom with sound waterproofing and room for the height rise. Older flats, CIDCO-era buildings or any bathroom with salt deposits on the outside wall usually need a full strip-back so the waterproofing can be redone.

What does a bathroom renovation cost in Thane? It depends on strip-back extent, waterproofing, tiles, fittings and any concealed plumbing correction. Our bathroom renovation cost guide breaks the budget down by component and size; the exact figure comes from an itemised quote after a site visit.

Can the bathroom be renovated without disturbing the whole flat? Yes — the bathroom is sealed off with dust sheets and debris is cleared daily, so the rest of the home stays usable.

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