# Bathroom Renovation in Thane: Waterproofing, Plumbing, Tiles & Cost

- Link: https://jyaniinterior.com/bathroom-renovation-thane-waterproofing-tiles-cost/
- Published: 2026-05-21T16:52:29+05:30
- Author: Bhawarlal Jyani

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](https://jyaniinterior.com/home-waterproofing-thane-monsoon/).

**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](https://jyaniinterior.com/service/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](https://jyaniinterior.com/bathroom-renovation-cost-thane-2026/)
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](https://jyaniinterior.com/service/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](https://jyaniinterior.com/bathroom-renovation/)
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.

## Related reading

 * [Best Materials for Thane Homes: Monsoon-Proof Your Renovation](https://jyaniinterior.com/best-materials-thane-homes-monsoon-proof/)
 * [Wardrobe Design Ideas for Thane Homes: Sliding, Hinged & More](https://jyaniinterior.com/wardrobe-design-ideas-thane/)
 * [Flooring Cost in Thane: Vitrified, Marble and Wooden Rates](https://jyaniinterior.com/flooring-cost-thane/)