Water finds its way through the smallest gaps — and once it does, it stains ceilings, peels paint, breeds mould and damages structure. In Kuala Lumpur's high-rise condos and humid climate, waterproofing is not an optional extra; it is the layer that keeps wet areas wet and everything else dry. Renovix provides waterproofing services across the Klang Valley for bathrooms, toilets, balconies, roofs and walls, both as part of new tiling and renovation projects and as repairs for existing seepage problems.
We treat waterproofing as a system, not a coat: the right product for the substrate, careful surface preparation, proper application and testing. Whether you need a bathroom waterproofed before tiling, a leaking roof or balcony treated, seepage stopped between floors, or cracks sealed before they let water in, we assess the situation and recommend the appropriate approach — and coordinate with plumbing and renovation work where the problem is connected.
Starting Prices
Indicative starting prices from our 2026 market research. Final quotation depends on site condition, scope and materials.
Waterproofing starts from
Starting from RM8
Starting from RM8 per sqft
Prices start from the stated amount. Final quotation depends on actual site condition, scope, materials, accessibility and installation requirements.
Quick Answers
Direct answers to the questions customers and search engines ask most often about this service.
Waterproofing costs start from RM8 per sqft for cementitious and RM8–RM15 for torch-on membrane in KL & Selangor. A full bathroom re-waterproofing with tile hack, membrane, flood test and retiling starts from RM1,500 to RM5,000. PU injection for ceiling leaks starts from RM350–RM650 flat per bathroom ceiling. Flat roof from RM8–RM25 per sqft. Final price depends on area size, existing damage, system and access.
All-in bathroom waterproofing includes hacking existing tiles, disposal, surface prep and crack sealing, applying 2–3 coats of cementitious or PU membrane, 24–72 hour flood test, screed to falls and relaying new tiles with grout — ready to use. Takes 5–8 days including curing.
Yes, but repair must be at source upstairs, not just painting your ceiling. For active leaks, PU injection at RM350–RM900 can seal ceiling cracks temporarily. For permanent fix, upstairs bathroom needs re-waterproofing. We diagnose water path, advise on strata Form 28 process for inter-floor leaks and quote the full sequence.
Torch-on SBS bitumen membrane (2-layer) is most durable for large flat roofs, 10–15 year lifespan at RM10–18 per sqft. PU liquid membrane is better for roofs with many pipes and brackets as it is seamless at RM12–20 per sqft. Avoid coating only on flat roof — it is temporary. Proper preparation and protection screed decide longevity.
Service Overview
Waterproofing fails when preparation is skipped. Our approach is to prepare the surface properly, apply the right system, and verify the result.
For new work, waterproofing is applied before tiling in wet areas: the surface is cleaned and prepared, corners and penetrations are reinforced, and the waterproofing membrane or coating is applied to the required coverage. Once cured, it is tested — typically with a water ponding test — before tiling proceeds. This is the sequence that protects the floor below your bathroom and the walls behind your tiles.
For existing problems — seepage from a bathroom above, a leaking roof, damp walls or a failing balcony — we start by identifying how water is getting in. The source is often not where the stain is. We then expose the affected area, repair the surface, seal cracks and apply the appropriate waterproofing system. Where the original waterproofing has failed, we remove and redo it properly rather than adding layers over a failing base.
Wet-area waterproofing
Bathrooms, toilets and balconies waterproofed before tiling to stop seepage.
Roof & wall treatment
Roof surfaces and exposed walls protected against rain and moisture penetration.
Leak & seepage repair
Existing leakage and seepage problems traced to the source and repaired.
Crack sealing & coatings
Cracks sealed and waterproof coatings applied to concrete and masonry surfaces.
Sub-Services
Renovix provides waterproofing for new construction, renovation and repairs. Each service can be booked on its own or combined with tiling and renovation work.
Bathroom floors and wet walls waterproofed before tiling to protect the floor below.
Toilet areas waterproofed as part of renovation or when seepage problems appear.
Open and covered balconies waterproofed against rain and cleaning water.
Roof surfaces treated to stop leaks and protect the structure beneath.
External and internal walls treated against moisture penetration and damp.
Concrete surfaces protected with waterproofing systems suited to the substrate.
Active leaks traced to their source, repaired and waterproofed.
Seepage through floors, walls and joints stopped at the point of entry.
Polyurethane waterproofing systems applied where flexibility and durability are needed.
Waterproof coatings applied to roofs, balconies and concrete surfaces.
Structural and surface cracks sealed before waterproofing to block water paths.
Sub-Services
Each of these scopes has its own page covering what the work includes, what is not included, cost factors and FAQs.
Problems We Solve
Seepage and leakage problems share one thing: the visible damage is rarely where the water enters. We find the entry point.
Water moving through floors from bathrooms or toilets above — stopped at the source.
Ceiling stains and damp patches caused by failed waterproofing or leaking pipes.
Persistent mould growth driven by moisture entering through walls and joints.
Rainwater finding its way through roof surfaces, joints and flashings.
Water seeping through balcony floors into rooms below.
Old waterproofing systems that have cracked, lifted or simply worn out.
These guides explain the causes, warning signs and practical solutions for the issues this service handles.
Pricing Guidance
Indicative starting prices based on current 2026 market research for Kuala Lumpur, Selangor and the Klang Valley. Final quotation depends on actual site condition, scope, materials and installation requirements.
Starting from RM8 per sqft — Indicative starting prices based on current 2026 market research for Kuala Lumpur, Selangor and the Klang Valley. Final quotation depends on actual site condition, scope, materials and installation requirements. Prices start from the stated amount. Final quotation depends on actual site condition, scope, materials, accessibility and installation requirements.
Last reviewed: 2026-09-03 · Send photos, measurements and location for a more accurate assessment. Prices are reviewed regularly.
| Service | Scope | Starting Price | Unit |
|---|---|---|---|
| Bathroom Waterproofing with Tile Hack & Relay | Full bathroom re-waterproofing: hack existing tiles, apply cementitious or PU membrane, flood test, screed and relay new tiles. | Starting from RM1500(RM1500–RM5000) | per bathroom |
| PU Injection for Ceiling Leak | PU injection grouting to seal active leak at ceiling or wall crack. Flat rate per bathroom ceiling where applicable. | Starting from RM350(RM350–RM900) | per job |
| Flat Roof Waterproofing | Waterproofing for flat roof, roof terrace or car porch using torch-on membrane or PU liquid membrane. | Starting from RM8(RM8–RM25) | per sqft |
| Balcony & Yard Waterproofing | Waterproofing for tiled balcony or yard, including tile hack, membrane and re-tile or screed. | Starting from RM800(RM800–RM3000) | per job |
| Wall Seepage & External Wall Coating | Water-repellent coating for external wall showing damp, efflorescence or seepage. | Starting from RM6(RM6–RM18) | per sqft |
What affects pricing
Prices start from the stated amount. Final quotation depends on actual site condition, scope, materials, accessibility and installation requirements.
Fast Photo Quote
Send them to us directly on WhatsApp and we will assess the Waterproofing work from the pictures before a quotation is prepared.
A wide shot, a close-up and your location are usually enough for us to assess the work.
Cost Factors
Waterproofing looks simple but preparation and system choice decide whether it lasts. These factors drive cost.
Bathroom 50–80 sqft vs flat roof 200–600 sqft; external wall height needs scaffolding.
Old membrane layers, ponding, cracked screed need hacking and re-screeding at RM2–5 extra psf.
Cementitious RM8–14, PU RM12–20, torch-on RM10–18, crystalline RM15–25 psf; polyurea premium systems quoted per project.
Cleaning, crack repair, fillets at upstands, primer — skipping prep is the most common reason waterproofing fails.
All-in bathroom includes hacking, membrane, flood test and retiling; waterproofing-only quotes exclude it.
High-rise condo access, lift booking, material grade (generic vs FOSROC/SIKA) and warranty length affect price.
Materials
We use branded waterproofing systems with manufacturer technical backup where possible, selected for substrate and exposure.
Brush-applied 2–3 coat system for bathrooms, wet kitchens, planters. Cost-effective, 5–7 year warranty.
Seamless elastic membrane for roofs, balconies, decks with complex penetrations. 7–10 year warranty.
SBS-modified 3–4mm sheet heat-welded to slab, highly durable for flat roofs. 10–15 year lifespan.
Expands to seal active leaks and cracks at ceiling or wall. RM80–RM250 per point market, or flat rate per ceiling.
Crystalline penetrates RC slab for lifetime protection; epoxy injection for structural cracks at RM150–400 per crack.
Water-repellent coating for external walls showing efflorescence, moss or damp after rain.
Duration
Waterproofing needs curing and testing time — rushing it causes failure.
5–8 working days including curing and flood test
2–4 hours per bathroom ceiling
3–6 days including tile hack and relay
2–5 days for membrane, plus protection screed
1–3 days per elevation depending on prep
24–72 hours ponding test before tiling
Rain, humidity and condo working hour restrictions can extend timeline. We include curing in schedule.
Scope
Scope
Property Types
Waterproofing needs are common to almost every property type in the Klang Valley.
Bathroom and balcony waterproofing, plus seepage repairs between units.
Wet-area waterproofing and leakage repair for apartment units.
Bathrooms, roofs and external walls protected against weather and moisture.
Larger roof, balcony and wall waterproofing scopes.
Commercial waterproofing for toilets, roofs and ground-floor areas.
Waterproofing applied before tiling in every renovated wet area.
Our Process
Waterproofing is a system with a sequence — skip a step and the system fails. This is how we work.
For existing problems, we trace how water is entering using moisture meter, visual inspection and checking the unit above or roof condition before quoting a method.
The surface is cleaned, repaired and dried — cracks sealed, corners reinforced with fillet, and loose material removed. Proper prep is 60% of a lasting job.
The appropriate membrane, coating or PU system is applied to the required coverage — 2–3 coats for cementitious, seamless for PU liquid, heat-welded for torch-on membrane.
Where possible the result is water-tested with ponding test for 24–72 hours, then handed over for tiling or finishing with warranty documentation.
Why Renovix
Waterproofing is invisible when done right — and expensive when done wrong. Here is what we focus on.
We find where water enters rather than treating the stain you can see.
Surfaces are cleaned, repaired and dried before any system is applied.
Honest selection between membrane, coating and PU systems for your substrate.
Wet areas are water-tested before tiling covers the work.
Waterproofing scheduled with plumbing, tiling and renovation work.
Waterproofing services across Kuala Lumpur, Selangor and the Klang Valley.
Service Areas
Waterproofing and leakage repair services are available across Kuala Lumpur, Selangor and the wider Klang Valley, including high-rise units and landed homes.
The federal capital — heritage shophouses, mid-century landed estates, older flats and a dense high-rise belt, all within one city.
Malaysia's most developed state — from 1950s Petaling Jaya and royal Klang to fast-growing corridors like Puchong, Kota Damansara and Cyberjaya.
Local housing stock, common problems and practical service notes for neighbourhoods and towns across the Klang Valley.
Not sure if we cover your area? Ask us — we serve most Klang Valley locations.
FAQs
Straight answers to the questions customers ask us most about this service.
What sits under the surface drives the cost more than the area size. A coating over sound screed follows a per-sqft rate — from RM8 for cementitious systems — while a full bathroom stripped and rebuilt is quoted as a package because hacking, membrane, flood test, screed and retiling all have to be right for each other. The flood test is the line worth insisting on in any quote: when two quotations for the same bathroom differ, it is usually because they assume different substrates or different tests — not because the sqft rate changed.
Tiles and grout are not fully watertight over time — water moves through joints and small gaps. Waterproofing beneath the tiles protects the floor slab and the ceiling below from seepage. Skipping it leads to inter-floor leaks and costly hacking later.
Cementitious slurry lasts 5–7 years, elastomeric coating 2–5 years, torch-on bitumen membrane 10–15 years, PU liquid membrane 7–10 years and crystalline waterproofing can be lifetime penetrating. Lifespan depends on preparation, product grade and conditions. We use mid to high-grade systems and document the method in the quotation.
PU (polyurethane) systems are flexible and suit areas subject to movement or standing water like roofs and balconies. Cement-based systems are rigid slurry applied in 2–3 coats, common for bathrooms before tiling. Choosing the cheaper system for the wrong application is the most common reason waterproofing fails.
For an existing seepage problem, the affected tiles usually need to be lifted to reach the failed waterproofing layer — treating the surface from above does not stop water that is already under the tiles. Non-hacking surface systems exist at RM1,500–RM3,500 per bathroom but are temporary for many cases. We assess and explain what the repair requires.
The stain is a symptom — the water is coming from the unit above, usually through its bathroom or balcony waterproofing. The repair needs to happen at the source. We can advise on the assessment, including Form 28 under Strata Management Act for inter-floor leaks, and coordinate the waterproofing work.
Where damp and mould are driven by moisture entering through the wall, treating the wall with the right waterproofing system after addressing the source can help. Painting over damp always fails. We assess whether the cause is external render failure, crack, window frame or plumbing leak.
Area size, existing membrane condition (old layers need hacking at extra RM2–5 psf), system chosen, surface preparation, height and access (scaffolding), drainage and ponding issues, and whether tiling reinstatement is included. All-in bathroom jobs include hacking, membrane, flood test and retiling; roof jobs may exclude protection screed — we itemise clearly.
Knowledge Hub
Background reading on cost, materials and what the work involves.
Cost guides
What a full bathroom rebuild includes, what moves the price, and how to tell whether you need a rebuild or a targeted repair.
Read guideCost guides
Why painters quote by wall area rather than by house, what changes between a condo and a landed home, and how preparation work moves the final figure.
Read guideTroubleshooting
A dried mark from a fixed problem and a live leak look almost identical from the floor. Here is how to tell them apart, and why repairing the ceiling first is the wrong order.
Read guidePlanning
Every building sets its own renovation rules. Here is what to ask your management corporation, what they will normally want from your contractor, and how to sequence it so approval is not what delays you.
Read guideMaterials & comparisons
Waterproofing is not one product. Matching the system to the surface — and to whether it will be tiled, walked on or exposed to sun — is what decides how long it lasts.
Read guideMaintenance
Grout and silicone are the cheapest maintenance in your home and the earliest warning system you have. Here is how to read them and when to act.
Read guideRelated Services
Waterproofing often pairs with other Renovix services. Explore the services customers usually combine with it.
Tile installation, replacement and repair for floors, walls and bathrooms.
View ServicePlumbing repairs, pipe work, tap and toilet fixes, leakage and drainage assistance.
View ServiceGeneral home renovation works, upgrades, repairs and improvement projects.
View ServiceInterior and exterior painting, repainting, touch-ups and wall finishing.
View ServiceGet a Free Quote
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