Bathroom Quality Inspection Checklist (India): Stage-Wise ITP with Hold Points & Tolerances

A site engineer with a checklist and spirit level inspecting a half-tiled Indian bathroom before handover

An Inspection & Test Plan (ITP) is the single document that decides when work is allowed to move to the next stage. In a bathroom — where a missed slope or an untested waterproofing coat becomes a leak two floors down a year later — the ITP is the difference between catching a defect while it costs ₹2,000 to fix and finding it after the false ceiling below is stained and it costs ₹40,000. This is the working checklist a site engineer, PMC or quality inspector runs on an Indian bathroom, stage by stage.

This is a professional resource in the Studio Matrx bathroom hub. It sits beside the bathroom design checklist you sign off before work starts, the bathroom waterproofing checklist that feeds the waterproofing rows below, the bathroom snag list you raise from the defects it catches, and the bathroom handover checklist that closes it out.

Caveat first. This ITP is a starting template. Tolerances, hold points and acceptance criteria must be reconciled with your actual contract, the manufacturer's data sheet (membrane, tile adhesive, sanitaryware), the project specification and the current edition of the relevant IS codes. Where a figure below is marked indicative it varies with city, spec and product — verify against the real project and a licensed professional before you rely on it.

How to use this document

An ITP is not a snag list — it runs ahead of the work, not after it. Set it up once at the start of the bathroom package and use it like this:

Fill the columns before work starts. Agree the acceptance criteria and who signs each stage with the contractor at the pre-start meeting, so nobody argues the goalposts later.
Respect the hold points. A Hold (H) point means work must stop until the inspection is passed and signed — the contractor cannot proceed at risk. A Witness (W) point means you are given notice and may attend, but work may continue if you do not. A Review (R) point is a document/record check only.
One row, one sign-off. Each stage is closed by a dated signature from both the contractor's supervisor and the client/PMC side. An unsigned row is an open item.
Attach evidence. Photographs, the ponding-test log, pressure-test readings and material test certificates get stapled to the ITP. "Verbally okay" is not a record.
Copy it per bathroom. On a multi-toilet project, run one ITP sheet per wet area — a slope that passed in the master bath tells you nothing about the powder room.

Where the ITP sits in the bathroom programme

The Inspection & Test Plan — stage by stage

This is the core of the document. Copy this table into your project QA file, add a Date / Signed by pair of columns on the right, and adapt the rows to your specification. The Hold / Witness column tells you which inspections are non-negotiable.

Stage	What to check	Acceptance criteria	Hold / Witness	Sign-off
1. Rough plumbing (pre-concealing)	Pipe routes, sizes, gradient of drainage, fixture centre-lines, wall/floor cut-outs	CPVC/UPVC to spec and IS sizes; soil/waste laid to fall; fixture rough-in dimensions match approved GA drawing; no pipe in structural member without approval	Hold	______
2. Plumbing pressure & drain test	Water supply lines under pressure; drainage lines for leaks/flow	Supply held at test pressure per spec (indicative ~1.5× working, held min 1 hr, no drop); drain lines free-flowing, no seepage at joints	Hold	______
3. Surface prep for waterproofing	Substrate cleaned, cured, filled; corners coved; pipe collars sealed	Surface sound, dust-free, cracks/honeycombs made good; 45° fillet cove at all wall-floor junctions; pipe penetrations sealed and collared	Hold	______
4. Waterproofing membrane	Coat coverage, DFT, coats, upstand height, laps	Membrane to manufacturer's DFT and number of coats; upstand min 300 mm on walls (min 1,800 mm in shower zone); reinforcing tape at all junctions; no pinholes/misses	Hold	______
5. Ponding (flood) test	24-48 hr water ponding on cured membrane	Water ponded to min 25 mm for min 24 hr (48 hr preferred); no drop beyond evaporation; no seepage on soffit/adjacent walls below	Hold	______
6. Screed & floor slopes	Screed level, slope to drain, drain set low point	Uniform fall of 1:80-1:100 toward every floor trap; no ponding zones; drain grating is the low point; screed bonded, no hollowness	Hold	______
7. Tile laying (floor & wall)	Adhesive bedding, lippage, level, plumb, joints, cuts, slope retained	Full adhesive bed (no hollow tiles on tap test); lippage within tolerance; joints uniform; wall tiles plumb, floor fall retained to drain; cut tiles neat at penetrations	Witness	______
8. Grouting & sealing	Joint fill, colour, corner sealant, drain surround	Joints fully packed, uniform colour, no gaps; flexible sealant (not grout) at internal corners and wall-floor line; drain surround sealed	Witness	______
9. Sanitaryware & CP fixing	WC, basin, mixers, geyser, health faucet, accessories set and sealed	Fixtures level and plumb; fixed to spec anchors; connections leak-free on test; silicone seal at WC/basin base; heights match drawing	Witness	______
10. Electrical	Points, RCBO/ELCB, earthing, IP rating, switch/geyser positions	All bathroom circuits on RCBO/ELCB; earthing continuity verified; fittings to correct IP rating for zone; no switch within reach of shower; geyser isolator provided	Hold	______
11. False ceiling & ventilation	Grid/board level, exhaust fan, access panel, light cut-outs	Ceiling level within tolerance; exhaust fan ducted to outside and running; access panel over concealed valves/trap; no sag or open joints	Witness	______
12. Final finish & clean handover	Overall snag, function test, silicone, cleanliness	All fixtures operate; no leaks after 24 hr use; drainage clears fast; silicone lines neat; surfaces cleaned; snag list closed	Hold	______

Tolerances — the numbers that settle arguments

Half of all bathroom quality disputes are really disagreements about how good is good enough. Fix the tolerances in writing at the start. These are widely used site values; treat them as indicative and align them to your specification and the tile/membrane data sheets.

Item	Tolerance / acceptance value	How to check
Floor slope to drain	1:80 to 1:100 fall toward every floor trap (steeper in shower zone)	Spirit level + wedge, or water/ball test — water must run to the drain with no standing puddles
Ponding after flood test	No water level drop beyond evaporation over 24 hr; zero seepage below	Marked water level + soffit inspection
Tile lippage (height step between adjacent tiles)	Max ~1 mm for joints under 6 mm; up to ~2 mm for wider joints (indicative)	Lippage gauge or straightedge across the joint
Floor/wall flatness	Max ~3 mm deviation under a 2 m straightedge (indicative)	2 m aluminium straightedge, feeler gauge
Wall plumb (verticality)	Within ~3 mm over 2 m height	Spirit level / plumb bob
Tile joint width	Uniform to spec; typically 2-3 mm (rectified) or 3-5 mm; within ±1 mm of nominal	Tile spacer / steel rule
Fixture level (WC, basin, counter)	Level within ~2 mm across the fixture; no visible tilt	Spirit level on the rim
Waterproofing upstand	Min 300 mm general walls; min 1,800 mm in shower splash zone	Tape measure against marked line
Hollow tiles (adhesive voids)	No hollow floor tiles; wall tiles max minor edge voids per spec	Tap test with a coin or hollow-sounding rod

Defect rating & rectification

Not every defect stops handover. Rate each open item so the team knows what must be fixed before sign-off and what can go on a punch list. Copy this key into your snag sheet.

Rating	Definition	Typical bathroom examples	Action & timing
Critical (C)	Safety, watertightness or code failure; will cause damage or is illegal	Failed ponding test, live socket in shower zone, no ELCB/earthing, sewer gas from an untrapped drain, no slope so water ponds	Stop handover. Rectify and re-inspect the hold point before any covering work continues.
Major (M)	Function or durability affected; visible and will worsen	Hollow floor tiles, leaking mixer connection, silicone missing at wet junctions, slope too flat causing slow drainage	Rectify before handover; re-witness. Do not close the stage until fixed.
Minor (A)	Cosmetic or minor, no functional impact	Slight grout shade variation, small chip at a cut tile edge, uneven silicone bead	Add to punch list; agree a fix date (indicative 7-14 days); can hand over with written acceptance.
Observation (O)	Note for record, within tolerance	Lippage at the upper edge of tolerance, minor joint-width variation	Record only; monitor. No rework unless it drifts out of tolerance.

Who signs what

Common mistakes

Signing a hold point after the trade has covered it. Waterproofing signed off after tiling has started is worthless — you cannot inspect what you cannot see. Sign before the covering trade mobilises.
Skipping the ponding test to save two days. The 24-48 hr flood test is the cheapest leak insurance on the whole project. A programme that has no time for it has no time for the rework either.
Checking slope with the eye instead of water. "Looks like it falls" is not an acceptance criterion. Pour water or roll a ball — the drain must be the low point.
No tolerances agreed up front. Without a written lippage and joint-width limit, every argument is opinion versus opinion. Fix the numbers at the pre-start meeting.
One ITP for the whole flat. Each wet area is inspected and signed separately. A shared sheet hides the powder room that never got a ponding test.
Verbal sign-offs. If it is not dated and signed with a photo attached, it did not happen. The ITP is a contractual record, not a courtesy.

Related resources & guides

Bathroom design checklist (India) — the pre-start checklist whose decisions the ITP verifies on site.
Bathroom waterproofing checklist (India) — the detailed checks behind the waterproofing and ponding rows above.
Bathroom snag list (India) — the room-by-room defect sheet you raise from failed ITP points.
Bathroom handover checklist (India) — the final acceptance document that closes out the ITP at handover.