Skip to content
lookup.sg

Waterproofing & Roofing in Singapore: 24 waterproofing contractors · bathroom waterproofing membrane only typically S$500–S$1,500 per bathroom

Updated October 2026How we rank
For ceiling leaks in HDB flats caused by wear and tear, HDB's Goodwill Repair Assistance scheme pays 50% of the repair cost, with the upper and lower flat owners splitting the rest. If the upper flat's renovation caused it, that owner pays in full. Bathroom waterproofing alone typically costs about $500–$1,500.

12 of the best-documented waterproofing contractors in Singapore

Businesses with the most complete public records first, photos, licence matches, hours and track record. Never ordered by payment.

Hydro-Seal Engineering Pte Ltd

Hydro-Seal Engineering Pte Ltd

Hougang

30+ years in business

14 min walk from Kovan MRT

Tat Soon Metal Works Pte Ltd

Tat Soon Metal Works Pte Ltd

Sungei Kadut

23+ years in business

19 min walk from Yew Tee MRT

Tong Seng Huat Engineering Pte Ltd

Tong Seng Huat Engineering Pte Ltd

Sungei Kadut

40+ years in business

41 Kranji Way

Bestcoat Contract Services Pte Ltd

Sembawang

31+ years in business

Admiralty St No.10

Flux Solutions Pte Ltd

Flux Solutions Pte Ltd

Bishan

15+ years in business

4 min walk from Bishan MRT

Kind Building Services Pte Ltd

Kind Building Services Pte Ltd

Sembawang

16+ years in business

10 min walk from Sembawang MRT

Le Fong Building Services Pte Ltd

Le Fong Building Services Pte Ltd

Serangoon

14+ years in business

24 min walk from Tongkang LRT

B4 Water Leakage Specialist Pte Ltd

B4 Water Leakage Specialist Pte Ltd

Serangoon

11+ years in business

24 min walk from Tongkang LRT

Roof Doctors Pte Ltd

Roof Doctors Pte Ltd

Yishun

14+ years in business

15 min walk from Yishun MRT

Buildbest Roofing & Construction Pte. Ltd.

Buildbest Roofing & Construction Pte. Ltd.

Bukit Batok

10+ years in business

19 min walk from Bukit Batok MRT

Roofers Home & Decor Pte Ltd

Roofers Home & Decor Pte Ltd

Geylang

Since 2022

4 min walk from Macpherson MRT

2ezBuilders Pte Ltd

2ezBuilders Pte Ltd

Clarke Quay

Since 2019

4 min walk from City Hall MRT

Ordered by verifiable signals, licence matches, track record and completeness of public records. Featured placements are labelled and never change this order.

Show all 24

Compare 8 waterproofing contractors side by side

Location, MRT walk, years in business, licence and published hours, facts from public records.

How much does waterproofing & roofing cost in Singapore?

2026 estimates. Costs depend on whether tiles must be hacked, the size of the bathroom, and the waterproofing system used.

  • Bathroom waterproofing membrane only

    S$500–S$1,500 per bathroom

  • Waterproofing with hacking and retiling

    S$3,100–S$4,700 per bathroom

    Includes hacking, membrane and new wall and floor tiles

  • Full bathroom renovation

    S$3,000–S$17,500 per bathroom

    Scope and fittings drive cost

Sources: SmartCalculator.sg: Renovation quotation guide Singapore (2026); MoneySmart: Kitchen, bathroom and living room renovation cost (2026). Prices in SGD, before GST unless stated.

How to choose a waterproofing contractor

  • For HDB ceiling leaks, report to HDB first; HDB will investigate the cause and advise whether the Goodwill Repair Assistance scheme applies before you hire anyone.
  • Ask the contractor how they will find the source (e.g. ponding test, moisture meter) before quoting a fix.
  • Ask which system they use: full hacking and new membrane, or non-hacking methods such as overlay membranes or nano-injection.
  • Get a written warranty on waterproofing specifically, not just on tiling.
  • For bathroom hacking in HDB flats, use a contractor from HDB's Directory of Renovation Contractors with a permit.

Red flags

  • Quoting a fix without testing where the water is coming from.
  • Sealing only the surface grout and calling it waterproofing.
  • No warranty, or a warranty that excludes leaks.

Questions to ask before you book

  • How will you identify the source of the leak?
  • Will the solution require hacking tiles, and does it need an HDB permit?
  • How long is the warranty on waterproofing?
  • Do you do a ponding test after the membrane is laid?

Questions about waterproofing & roofing in Singapore

Who pays for a ceiling leak in an HDB flat?

If HDB finds the leak is due to wear and tear, its Goodwill Repair Assistance scheme pays 50% of the repair cost and the upper and lower flat owners share the remaining 50% equally. If the upper flat's renovation or a faulty pipe within it caused the leak, the upper flat owner pays in full. GRA covers the floor slab repair, not damaged fixtures such as carpentry.

Who pays for a ceiling leak in a condo?

Condos follow the Building Maintenance and Strata Management Act. Under section 101(8), a leak through your ceiling is presumed to come from the unit above unless proven otherwise, so the upper owner is generally responsible for repairs. This differs from HDB's cost-sharing scheme. Your MCST can help arrange inspections between owners.

How much does bathroom waterproofing cost in Singapore?

Applying a waterproofing membrane alone typically costs about $500–$1,500 per bathroom in 2026. If the old tiles must be hacked and replaced, waterproofing plus retiling is around $3,100–$4,700 per bathroom. Non-hacking methods approved by HDB, such as overlay membranes, can avoid retiling in some cases.

Can leaks be fixed without hacking the toilet?

Sometimes. HDB has identified non-hacking repair methods, including a nanotechnology waterproofing system and an overlay waterproofing membrane system, as alternatives for residents who do not want to hack their toilet tiles. Whether they work depends on the leak's cause, so get the source diagnosed first.

How many waterproofing & roofing are there in Singapore?

Lookup lists 24 waterproofing & roofing in Singapore as of October 2026, with the largest concentration in Geylang (4). Listings are compiled from government registers and open map data and refreshed regularly.