Waterproofing prices at a glance
Short answer: in Bali, re-waterproofing a flat roof with PU membrane costs IDR 260,000–420,000 per m², a remedial bathroom IDR 6,500,000–12,000,000 per room (re-tiling is a separate line), a pool shell membrane IDR 280,000–450,000 per m² and below-ground crystalline treatment IDR 280,000–420,000 per m². A leak inspection costs IDR 500,000–1,000,000 and is credited to the repair if we do the work.
| Service | Guide Price (IDR) | Notes |
|---|---|---|
| Roof, bathroom or wall leak inspection & diagnosis | 500,000–1,000,000 | Credited toward the repair if we do the work |
| Pool inspection & water-loss check | 1,200,000–2,000,000 | Bucket, dye and pipe pressure test |
| Roof re-waterproofing, PU liquid (per m²) | 260,000–420,000 | Substrate prep included |
| Roof membrane – small repair (under 1 m²) | 750,000–1,200,000 | Clean and patch |
| Terrace / balcony membrane (per m²) | 320,000–480,000 | Foot-traffic rated finish |
| Bathroom waterproofing – remedial (per bathroom) | 6,500,000–12,000,000 | Strip, treat, re-membrane; re-tiling is a separate line in the quote |
| Bathroom – new-build wet-area membrane (per bathroom) | 2,500,000–4,500,000 | Before tiling, scope by size |
| Under-tile membrane, new build (per m²) | 150,000–250,000 | Reinforced corners |
| Pool shell membrane (per m²) | 280,000–450,000 | PU or reinforced cementitious |
| Pool crack injection (per crack) | 650,000–1,200,000 | Polyurethane injection |
| Below-ground crystalline treatment (per m²) | 280,000–420,000 | Two-coat system |
| Drainage board system · full pool re-lining | by quote | Scope by area, access and finish |
Roof membrane prices per m²
| Service | Guide Price (IDR) | Notes |
|---|---|---|
| PU liquid membrane re-waterproofing (per m²) | 260,000–420,000 | Substrate prep included |
| Terrace / balcony membrane, walkable finish (per m²) | 320,000–480,000 | Foot-traffic rated top coat |
| Torch-on bitumen (APP) sheet (per m²) | from 200,000 — guide | Large open roofs; confirmed after inspection |
| Cementitious flexible membrane (per m²) | from 150,000 — guide | Gutters, planters, under tiles |
| Small membrane repair (under 1 m²) | 750,000–1,200,000 | Clean and patch |
| TPO / PVC sheet membrane | by quote | Rare on Bali villas; on request |
Roof prices are the same in Denpasar, across Badung and in Ubud. Whether your roof needs a patch, a detail repair at the drains and parapets or a full strip-and-replace is decided at the inspection. Method, systems and a pre-rainy-season checklist: roof waterproofing in Bali.
Bathroom and wet-area waterproofing prices
| Service | Guide Price (IDR) | Notes |
|---|---|---|
| Remedial bathroom waterproofing (per bathroom) | 6,500,000–12,000,000 | Strip, treat, re-membrane; re-tiling is a separate line in the quote |
| New-build wet-area membrane (per bathroom) | 2,500,000–4,500,000 | Before tiling, scope by size |
| Under-tile membrane, new build (per m²) | 150,000–250,000 | Reinforced corners and upstands |
A leak into the room below is quoted after we have traced it — an injection can fix a small one, but most bathroom leaks mean lifting the tiles down to the slab. Details: bathroom waterproofing.
Pool membrane and re-lining prices
| Service | Guide Price (IDR) | Notes |
|---|---|---|
| Pool shell membrane — PU or reinforced cementitious (per m²) | 280,000–450,000 | Includes crack treatment |
| Crystalline treatment, dormant cracks (per m²) | 280,000–420,000 | Negative-side |
| Active crack injection (per crack) | 650,000–1,200,000 | Polyurethane resin |
| Pool inspection & water-loss check | 1,200,000–2,000,000 | Before any re-lining quote |
Re-tiling over the new membrane is quoted with the finish you choose — Sukabumi stone, mosaic or ceramic. Details: pool waterproofing and re-lining.
Basement and retaining wall prices
| Service | Guide Price (IDR) | Notes |
|---|---|---|
| Crystalline treatment (per m²) | 280,000–420,000 | Two-coat system |
| Crack injection (per crack) | 650,000–1,200,000 | Polyurethane / acrylic resin |
| Drainage board or drainage behind a retaining wall | by quote | Scope by wall area and access |
The first step: a leak inspection at a fixed price
Most quotes start with a short inspection: IDR 500,000–1,000,000 for a roof, bathroom or wall leak, IDR 1,200,000–2,000,000 for a pool water-loss check with dye and pipe pressure tests. We trace where water actually enters — not only where it shows — photograph the failure points and give you a written scope and price. For roof, bathroom and wall leaks, the inspection fee is credited to the repair if we do the work. Many jobs can be narrowed down from photos on WhatsApp before anyone visits.
What's included in a waterproofing price
- Removing failed membrane where the quote says strip-and-replace
- Substrate preparation: cleaning, laitance removal and primer
- Crack treatment and detailing at drains, parapets, pipes and fittings
- The specified membrane system in the specified number of coats
- A flood test of wet areas before tiling, where access allows
- Before-and-after photos of the work
Your written quote states whether re-tiling, finishes and access equipment are included. Materials are specified for Bali's UV, salt and rainfall — not the cheapest product on the shelf.
How long it lasts — and what is covered
A correctly specified system applied to a prepared substrate lasts 10–15 years in Bali's conditions; a membrane rolled over a failed layer or onto dusty, damp concrete often fails in under three. Before any work starts we explain in writing what is covered and for how long, so you know exactly what you are buying.
What pushes a waterproofing quote up
- An old membrane to strip. Removing failed layers is often the biggest line on the quote.
- Cracks and movement. Active cracks need injection before any membrane goes on.
- Many penetrations. Pipes, AC brackets, tank stands and drains each need their own detail.
- Ponding. A flat roof without falls may need re-screeding before it can be waterproofed.
- Tiles in the way. Bathrooms and pools have to be stripped to the slab before re-membraning.
- Access and weather. High roofs, occupied villas and wet-season dry windows add time.
Waterproofing price questions
How much does waterproofing cost per m² in Bali?
As a guide: PU roof membrane IDR 260,000–420,000 per m², walkable terrace membrane IDR 320,000–480,000, under-tile membrane on a new build IDR 150,000–250,000, pool shell membrane IDR 280,000–450,000 and below-ground crystalline treatment IDR 280,000–420,000 per m².
Do you charge for the inspection?
Yes, a fixed fee: IDR 500,000–1,000,000 for a roof, bathroom or wall leak, credited toward the repair if we do the work, and IDR 1,200,000–2,000,000 for a pool water-loss check with dye and pressure tests.
Why is re-waterproofing more expensive than a first membrane?
Because the failed layer has to come off first. A new membrane on top of an old, delaminating one bonds to that layer instead of the concrete and fails with it.
How long does waterproofing last in Bali?
A correctly specified system on a prepared substrate lasts 10–15 years in Bali's conditions. Systems applied over failed membranes or onto poor substrates often fail in under three years.
Can you give me a price from photos?
Often a guide range, yes. Send photos of the stain inside and the surface outside, the approximate size and your area on WhatsApp; we confirm the exact scope and price at the inspection.
Areas Covered
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