WATERPROOFING SPECIALISTS

Waterproofing Services Singapore

Stop water ingress at its source. Professional waterproofing for HDB, Condo & Landed properties. Bathroom, balcony, and basement solutions including specialized negative waterproofing.

Limited-time promoEssential one-wall or one-ceiling from S$199 — non-toxic treatment + anti-mould paint.

Free Waterproofing Assessment Call: +65 8751 5146

Most cases don't need a paid inspection.

WhatsApp us a photo of your mould — we'll tell you honestly if you need an on-site visit or if we can quote directly. Zero hard-selling, transparent pricing, no obligation.

WhatsApp a Photo Call +65 8751 5146 Free Inspection (if needed)

No hard-selling. Transparent pricing. Reply within working hours.

Property Types

Methods Available

From $800

Starting Price

3-5 Years

Warranty

Waterproofing by Property Type

Each property type in Singapore has unique waterproofing challenges. We tailor our solutions to your specific needs.

Landed Properties

Multi-level waterproofing challenges requiring specialized solutions

Common Issues:

Basement flooding during monsoon season
Rising damp from ground moisture
Roof terrace membrane failures
Garden retaining wall seepage
Car porch water ponding
External facade water penetration

Key challenges: Larger surface areas, ground-level moisture exposure, multiple roof levels

HDB Flats

Shared infrastructure creates unique waterproofing requirements

Common Issues:

Bathroom floor leaks affecting neighbors below
Balcony drainage blockage and overflow
Window frame seepage during heavy rain
Service yard water accumulation
Aging infrastructure (pre-2000 flats)
Common corridor water damage

Key challenges: Shared plumbing stacks, neighbor coordination, HDB approval processes

Condominiums

High-rise environments with complex moisture dynamics

Common Issues:

FCU condensation causing ceiling damage
Balcony waterproofing membrane failure
Inter-unit leaks through shared walls
MCST-managed common area seepage
Wind-driven rain on higher floors
Planter box overflow damaging units below

Key challenges: Central systems, MCST coordination, wind-driven rain exposure

Waterproofing Methods

We use multiple waterproofing techniques to match your specific situation, budget, and long-term needs.

Membrane Waterproofing

Liquid-applied or sheet membranes creating a continuous waterproof barrier over surfaces.

Best for: Bathrooms, balconies, roof terraces Durability: 5-10 years

Cementitious Coating

Cement-based waterproof coating that bonds directly to concrete surfaces.

Best for: Foundations, retaining walls, water tanks Durability: 10-15 years

Injection Grouting

PU or epoxy resin injected into cracks to seal active water leaks quickly.

Best for: Active leaks, crack sealing, quick fixes Durability: 5-8 years

Crystalline Waterproofing

Penetrating treatment that forms crystals within concrete to block water permanently.

Best for: Long-term concrete protection, new construction Durability: Lifetime of structure

Negative Waterproofing

Applied from the interior (opposite side of water pressure) when exterior access is impossible.

Best for: Existing basements, retaining walls, lift pits Durability: 8-12 years

Negative Waterproofing Explained

Negative waterproofing is a specialized technique applied from the interior side of a wall or floor—the opposite side from where water pressure originates. This method is essential when you cannot access the exterior (positive) side of the structure.

When to Use Negative Waterproofing:

Existing basement walls where exterior excavation is impractical
Retaining walls against soil in landed properties
Lift pits and underground car parks
Buildings where exterior access is blocked by neighbors
Historic structures where exterior work would damage facades

Materials Used:

Crystalline cementitious systems (Xypex, Penetron)
Epoxy-modified cementitious mortars
Polyurethane injection for active leaks
Acrylic gel injection systems
Flexible waterproof coatings

Important Considerations: Negative waterproofing is generally less effective than positive waterproofing for heavy hydrostatic pressure. It's best suited for moderate water ingress. For severe basement flooding, we may recommend internal drainage systems with sump pumps.

$1,200 - $3,500

Typical basement wall treatment

8-12 Years

Expected durability

3-5 Days

Typical treatment time

Waterproofing FAQs

What is negative waterproofing and when is it needed?

Negative waterproofing is applied from the interior side of a wall (opposite to water pressure), typically used when exterior access is impossible. It's essential for basement walls against soil, retaining structures, lift pits, and existing buildings where excavation isn't feasible. Materials include crystalline cementitious systems and epoxy-modified mortars.

How much does bathroom waterproofing cost in Singapore?

Bathroom waterproofing in Singapore typically costs $800-$2,500 depending on size, condition, and method. HDB bathrooms average $800-$1,200, while condo master bathrooms may cost $1,500-$2,500. This includes membrane application, floor-wall junctions, and drain surrounds. We provide transparent quotes after inspection.

Can waterproofing prevent mould growth?

Yes, waterproofing is one of the most effective mould prevention strategies. By stopping water ingress at its source, you eliminate the moisture that mould needs to grow. We often recommend waterproofing after mould remediation to prevent recurrence, especially in bathrooms, basements, and areas with chronic seepage.

How long does waterproofing last in Singapore's climate?

Quality waterproofing in Singapore typically lasts 5-10 years for membranes and 10-15+ years for crystalline systems. Singapore's tropical climate with heavy rain and humidity makes proper installation critical. We use premium materials rated for tropical conditions and provide 3-5 year warranties on workmanship.

Is basement waterproofing possible for existing landed properties?

Yes, existing basements can be waterproofed using negative waterproofing methods from inside, without excavation. We apply crystalline coatings or injection grouting to seal active leaks. For severe cases, we install internal drainage channels with sump pumps. Results depend on water pressure and wall condition.

What's the difference between waterproofing and damp-proofing?

Waterproofing creates a complete barrier against water under pressure (like basement walls against soil). Damp-proofing only resists moisture vapor, not liquid water. Basements and below-grade areas need waterproofing; above-grade walls may only need damp-proofing. We assess your specific situation to recommend the right solution.