Expert Waterproofing Services in Singapore
Stop roof, balcony, bathroom, and concrete leakage with advanced waterproofing solutions by RS BUILDERS CONTRACTORS PTE. LTD. Advanced PU injection, membrane waterproofing, and long-lasting leak protection guaranteed across Singapore.
Your Trusted Waterproofing Contractor in Singapore
RS BUILDERS CONTRACTORS PTE. LTD. is a leading specialist waterproofing contractor in Singapore, dedicated to resolving persistent water leakage and seepage problems. From leaking bathroom floors, RC flat roofs, and balconies to external wall cracks and basement seepage in HDB flats, condominiums, and commercial buildings, we provide long-lasting structural protection.
Using advanced non-destructive leak detection technologies alongside proven PU grouting injection, torch-on membranes, and liquid waterproofing systems, our certified specialists diagnose root causes with extreme accuracy. We back all our waterproofing applications with solid workmanship warranties to protect your property against moisture damage.
Advanced PU Injection
High-pressure Polyurethane grouting to seal deep concrete cracks and stop water seepage permanently.
Non-Hacking Solutions
Modern clear waterproof coatings that fix bathroom floor leaks without hacking existing wall or floor tiles.
Comprehensive Roof & Wall Seal
Heavy-duty membrane waterproofing for RC flat roofs, planter boxes, and exterior facade walls.
PROFESSIONAL WATERPROOFING & SEEPAGE REPAIR IN SINGAPORE
Advanced, non-hacking waterproofing solutions by RS BUILDERS CONTRACTORS PTE. LTD. Protect your HDB, condo, landed, or commercial property from persistent water leaks, ceiling marks, and structural damage.
HDB Waterproofing
HDB-compliant toilet membrane treatment and ceiling leak repair solutions.
- HDB Approved Non-Hacking Bathroom Waterproofing
- Inter-Floor Ceiling Leak Investigation & Sealing
- Toilet Floor Tile Waterproof Membrane Coating
- Grouting Line Cleanout & Waterproof Sealer
- HASS & PUB Standard Material Compliance
Condo Waterproofing
High-end condominium balcony, toilet, and ceiling seepage treatment.
- MCST Compliant Waterproofing Work Execution
- Thermal Imaging Leak Origin Diagnosis
- Private Balcony & Planter Box Membrane Sealing
- Concealed Shower Area Waterproof Barrier
- Long-Term Warranty Against Recurrent Leaks
Residential Waterproofing
Complete home dampness control, wall moisture treatment, and sealing.
- Landed House Roof & Terrace Waterproofing
- Interior Wall Peeling & Bubbling Paint Fixes
- Floor Joint & Skirting Moisture Barrier
- Non-Toxic Clean Chemical Application
- Upfront On-Site Moisture Audit & Quote
Commercial Waterproofing
Heavy-duty waterproofing for commercial buildings, factories, and retail shops.
- Commercial Rooftop Membrane & Torch-On Sheet
- Basement Carpark Water Seepage Grouting
- Industrial Kitchen & Washroom Waterproofing
- Minimal Downtime Schedule Options
- Industrial Grade PU & Polyurethane Systems
Bathroom Waterproofing
Effective non-hacking chemical barrier injection for bathroom tile leaks.
- Deep Penetrating Transparent Chemical Coating
- Tile Joint Epoxy Grout Re-Sealing
- Floor Drain & Waste Pipe Surround Sealing
- Fixes Lower Floor Ceiling Drip Marks
- 100% Non-Disruptive Fast Dry Formula
Toilet Waterproofing
Targeted toilet floor sub-base waterproofing and leak containment.
- WC Bowl Base Perimeter Seal Replacement
- Waterproof Cement Screed Application
- Floor Trap Collar Moisture Protection
- Eliminating Odor Caused by Sub-Base Dampness
- Durable Waterproof Membrane Layer
Shower Waterproofing
Shower kerb, glass screen edge, and wall tile waterproof treatment.
- Shower Kerb Base Joint Liquid Membrane
- High Water Pressure Area Wall Waterproofing
- Anti-Fungal Silicone Sealant Application
- Shower Waste Outlet Leak Repair
- Fast 24-Hour Drying & Curing Time
Kitchen Waterproofing
Under-sink floor barrier, cabinet back wall, and pipe collar sealing.
- Kitchen Sink Waste Line Penetration Sealing
- Cabinet Base Board Moisture Barrier Coating
- Floor Tile Grout Waterproof Hydrophobic Coat
- Washing Machine Drain Point Area Proofing
- Prevents Wood Rot & Mold Growth Under Cabinets
Balcony Waterproofing
Weatherproof coating and slab joint sealing for open outdoor balconies.
- UV-Resistant Polyurethane Liquid Membrane
- Balcony Sliding Door Track Water Seep Fix
- Planter Box & Drain Grating Waterproofing
- Non-Hacking Clear Hydrophobic Tile Sealer
- Prevents Rain Ingress into Lower Floor Units
Roof Waterproofing
Reinforced torch-on membrane and liquid acrylic roof coating system.
- Concrete Roof Slab Torch-On Bitumen Sheet
- Metal Roof Joint Sealant & Anti-Rust Coating
- Roof Ridge Flashing & Gutter Seepage Fix
- Heat-Reflective Solar Cool Thermal Coating
- Heavy Rain Weatherproofing Guarantee
Basement Waterproofing
Underground concrete wall injection and negative side pressure sealing.
- High-Pressure Polyurethane PU Injection Grouting
- Underground Hydrostatic Water Pressure Barrier
- Basement Wall & Retaining Wall Crack Repair
- Sump Pump Area Drainage Waterproofing
- Stops Persistent Subterranean Seepage
Wall Waterproofing
Interior wall moisture barrier treatment and anti-dampness paint prep.
- Internal Brickwork Moisture Proofing
- Efflorescence (White Powder) Neutralizing Seal
- Wall Plaster Crack Epoxy Filling
- Breathable Waterproof Undercoat Primer
- Prevents Wall Flaking & Mold Spores
External Wall Waterproofing
Facade crack sealing and weatherproof siloxane paint application.
- Exterior Building Facade Crack Repair
- Rope Access / Scaffolding Waterproof Coating
- Hydrophobic Clear Sealer for External Bricks
- Window Frame Perimeter PU Sealant Caulking
- Resists Severe Wind-Driven Monsoons
Ceiling Waterproofing
Lower floor ceiling water stain, concrete spalling, and drip fix.
- Inter-Floor Upper Unit Water Seepage Treatment
- Slab Injection Grouting for Ceiling Cracks
- Anti-Spalling Concrete Treatment & Skim Coat
- Ceiling Water Mark Stain Blocking Undercoat
- Restores Concrete Integrity & Aesthetics
Swimming Pool Waterproofing
Flexible pool tile render membrane and underwater crack sealing.
- Pool Tile Joint Epoxy Grout Renewal
- Submerged Concrete Crack Injection
- Chlorine & Chemical Resistant Flexible Membrane
- Pool Deck Drainage & Skimmer Box Sealing
- Stops Water Loss & Structural Slab Erosion
PU Injection Grouting
High-pressure polyurethane foam injection to seal internal concrete voids.
- Fast-Expanding Hydrophobic PU Foam Resin
- Fills Micro-Cracks Deep Inside Concrete Slabs
- Stops Active Running Water Leaks Instantly
- Non-Destructive Target Port Drilling
- Ideal for Ceilings, Basements & Bathrooms
Crack Injection Grouting
Epoxy resin and cementitious crack pressure injection for structural walls.
- High-Tensile Structural Epoxy Resin Injection
- Restores Load-Bearing Capacity of Fractured Concrete
- Seals Hairline to Wide Structural Cracks
- Durable Moisture Bond Strength
- Clean Surface Finish After Nipple Removal
Concrete Waterproofing
Crystalline concrete waterproofing and pore-blocking slurry treatment.
- Deep Penetrating Crystalline Slurry Coating
- Self-Healing Micro-Crack Technology
- Protects Reinforcing Rebar Against Corrosion
- Suitable for Water Tanks, Slabs, and Retaining Walls
- Permanent Integral Concrete Protection
Water Seepage Repair
Accurate diagnostic leak detection and targeted non-invasive repair.
- Moisture Meter & Thermal Camera Leak Tracing
- Concealed Waste Pipe Joint Leak Repair
- Floor Tile Grout Injection & Chemical Barrier
- Eliminates Ceiling Water Droplets & Dampness
- Fast Emergency Response On-Site
Bathroom Leakage Repair
Rapid resolution for active bathroom floor and wall pipe water leaks.
- Non-Hacking Clear Chemical Flood Treatment
- WC Flange & Floor Trap Leak Sealing
- Waterproof Grout Regrouting for Tiles
- Stops Neighboring Lower Unit Ceiling Drips
- Minimal Disruption to Daily Routine
Wall Leakage Repair
Treating damp walls, bubbling paint, and water marks caused by leaks.
- Internal Damp Wall Injection Barrier
- Window Frame Water Leakage Perimeter Seal
- Removal of Damp Plaster & Anti-Mold Treatment
- High-Grade Sealant Fillers for Wall Cracks
- Long-Lasting Dry Wall Surface Restoration
Why Choose RS Builders For Waterproofing Services
Certified leak repair contractors offering advanced PU grouting, torch-on membrane roof sealing, and non-destructive waterproofing across Singapore.
Certified Leak Specialists
BCA-trained waterproofing specialists skilled in resolving complex ceiling leaks, RC flat roof seepage, and basement dampness.
Advanced PU Grouting
High-pressure Polyurethane injection technology that penetrates deep into concrete voids to seal leaks permanently.
Non-Hacking Technology
Clear waterproof coating and invisible sealants designed to fix toilet and balcony water seepage without removing existing tiles.
Heavy-Duty Membranes
Torch-on bituminous and liquid-applied waterproofing membranes engineered specifically for tropical rain and weather resilience.
Transparent Cost Estimates
Upfront detailed quotes following site inspection with clear line items and absolute zero surprise additional charges.
Official Leak Warranty
All waterproofing applications and structural roof seal repairs are backed by long-term official warranty protection.
Our Simple Waterproofing Process
A certified 5-step waterproofing workflow engineered to detect water seepage, apply heavy-duty sealant membranes, and protect Singapore properties.
Leak Enquiry
Contact us via WhatsApp or phone with photos/videos of ceiling water stains, wall cracks, or toilet floor leaks.
Thermal Inspection
BCA-trained specialists visit your property to locate hidden concrete voids and moisture points using thermal imaging.
Detailed Proposal
Receive a transparent cost quotation specifying PU grouting, torch-on membrane, or non-hacking sealant solutions.
Waterproof Seal
Our certified team executes high-pressure PU injection or heavy-duty membrane laying to seal leaks permanently.
Ponding & Handover
We complete flood/ponding leak testing, clean up the site, and issue an official warranty certificate for complete peace of mind.
Verified Waterproofing Feedback Across Singapore
Extremely fast response for our severe roof ceiling leak. The team applied heavy-duty membrane waterproofing and fixed rain seepage completely.
Had concrete slab water seepage between floors. Their specialists used non-destructive PU injection grouting to stop the leak without hacking tiles!
Water was leaking down to our neighbor's lower toilet ceiling. They sealed the bathroom floor trap and tile joints cleanly. Great service!
Heavy rain was leaking through our bedroom window frame. Replaced old cracked silicone sealant with high-grade weatherproofing sealant.
Applied anti-slip heavy-duty epoxy coating for our shop walkway floor. Seamless finish, durable quality, and finished right on schedule.
Fixed outdoor balcony tile water pooling and seepage issue. Thorough clear liquid waterproofing coating with 100% water ponding test victory.
Repaired deep structural wall cracks causing rain moisture penetration. Filled epoxy mortar and repainted smoothly with zero trace left.
Fixed active water dripping from concrete ceiling slabs in our office lobby. Professional inspection, fair quote, and solid warranty provided.
Re-sealed rusted glass canopy joints and metal roof overlap gaps. No more annoying water drips during thunderstorms!
Applied weather-shield anti-fungal waterproofing paint on our exterior facade walls. Protected furniture and completed work cleanly.
Used thermal leak detection to locate hidden concealed pipe seepage inside concrete wall without breaking unnecessary tiles. Very accurate!
Engaged them for full building maintenance including gutter leak repairs and silicone recaulking. Highly professional team in Singapore.
Resolved toilet floor waterproofing failure using high-density polyurethane grouting. Fast 1-day completion with minimal disruption!
Torch-on waterproofing membrane laid perfectly on our open roof terrace. Passed multiple heavy rainstorms with zero leak traces.
Fixed peeling paint and damp patches on interior walls caused by exterior wall water absorption. Quality workmanship and clean site protection.
Complete basement water seepage seal using heavy-duty chemical grouting. Highly knowledgeable specialists with solid warranty documentation.
Frequently Asked Questions
We diagnose roof leakage sources using non-destructive inspection tools. Our technicians clean damaged roof areas, repair cracked tiles or metal overlaps, and apply heavy-duty liquid waterproofing membranes. This creates an impenetrable, weather-resistant barrier that stops rainwater penetration and protects your ceiling structure permanently against harsh monsoon weather across Singapore residential properties.
PU (Polyurethane) injection grouting is a specialized chemical repair method designed to seal internal concrete slab cracks without hacking tiles. We drill tiny ports into affected joints and inject high-pressure liquid polyurethane resin. Upon contact with hidden moisture, the resin rapidly expands into a dense waterproofing foam, sealing micro-voids completely to prevent future water leakage between property floors.
Yes, most HDB and condo toilet water leaks can be fixed efficiently without costly tile hacking. We apply advanced non-hack chemical waterproofing treatments directly onto bathroom floor tiles and grout lines. Paired with localized PU grouting under the floor slab, this seals hidden water passage channels, halts downward seepage to your neighbor's lower ceiling, and restores full waterproofing integrity quickly.
Window frame water leaks usually occur when exterior silicone sealants degrade over time. Our team removes old, cracked joint sealant around aluminum window frames and cladding interfaces. We re-caulk perimeter joints with industrial-grade, UV-resistant weatherproofing sealant, ensuring an airtight bond that prevents rainwater ingress and wall dampness during severe Singapore windstorms.
High-performance epoxy coating is ideal for residential balconies, commercial walkways, corridors, and industrial spaces. We prepare concrete sub-surfaces thoroughly before applying multi-layer anti-slip epoxy resin systems. The resulting seamless floor coating is oil-resistant, water-impermeable, highly durable under heavy foot traffic, and exceptionally easy to clean and maintain over long periods.
Balcony water leaks stem from failed waterproofing membranes or blocked floor drains. We clean balcony tile surfaces, repair degraded grout lines, and apply transparent or elastomeric waterproofing coatings engineered for outdoor UV exposure. We also inspect drainage slopes to ensure efficient water runoff, followed by rigorous ponding tests to verify 100% leak protection success.
Structural wall cracks allow moisture penetration, causing interior paint peeling and concrete spalling. We groove out deep wall cracks, clean structural dust, and inject high-strength epoxy filler or flexible polyurethane sealant. Once cured, the repaired surface is smoothed flat and finished with protective anti-fungal primers, restoring structural integrity and wall aesthetics cleanly.
Ceiling water stains usually stem from upper-floor wet area membrane breakdown, concealed pipe leaks, or exterior wall seepage. Our specialists conduct thermal inspections to locate hidden water paths. We resolve the core leak source using targeted injection grouting or sealant repair, treat water-damaged ceiling concrete, and coat affected areas with mold-resistant anti-fungal paint.
Canopy leaks occur due to aged rubber gaskets, rusted screw fixings, or cracked glass joints. We scrape away deteriorated sealants from canopy structures, treat surface rust on metal overlaps, and apply high-adhesion structural silicone sealants. We also install protective waterproofing tapes over roof joints to ensure maximum resistance against heavy tropical rainfall.
Yes, we provide full exterior wall painting and protective coating services for landed homes, condos, and commercial buildings. We wash exterior walls, repair plaster cracks, and apply premium Nippon or Dulux weather-shield anti-fungal paints. This multi-layer coating shields building facades against rain absorption, algae growth, and UV degradation for many years.
Thermal imaging cameras detect subtle temperature differentials caused by hidden moisture behind walls and under concrete floors. This non-invasive diagnostic method allows us to pinpoint concealed pipe leaks or sub-floor water accumulation accurately without breaking tiles unnecessarily, saving property owners significant time, repair costs, and structural disruption.
Yes, we provide tailored waterproofing and structural maintenance packages for commercial offices, retail shops, industrial factories, and management MCSTs. Services include gutter clearing, facade joint recaulking, concrete slab inspection, and routine roof membrane maintenance, backed by transparent flat-rate quotes and official workmanship warranty certificates.
Stop Water Leakage With Expert Waterproofing Services
Certified Singapore waterproofing contractors for emergency roof leaks, non-destructive PU injection grouting, toilet epoxy sealing, and window waterproofing with 100% upfront flat rates.
