Waterproofing Prices
$500 – $5,000
Typical range · bathroom to balcony · Updated March 2026
Real pricing data for every waterproofing service in Australia. From bathroom membranes and shower recesses to balcony waterproofing and remedial repairs — know what you should pay.
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Waterproofing Prices by Service
National average prices — standard residential waterproofing
| Service | From | Average | Up to |
|---|---|---|---|
| Bathroom Waterproofing Full bathroom wet area waterproofing membrane | $50/m² | $65/m² | $90/m² |
| Shower Recess Waterproofing Shower base and walls waterproofing | $800/job | $1200/job | $2000/job |
| Balcony/Deck Waterproofing External balcony membrane and drainage | $60/m² | $85/m² | $120/m² |
| Roof Waterproofing Flat or low-pitch roof membrane coating | $40/m² | $55/m² | $80/m² |
| Basement/Subfloor Waterproofing Below-grade tanking and drainage | $100/m² | $160/m² | $250/m² |
| Retaining Wall Waterproofing Waterproof membrane on retaining wall | $45/m² | $65/m² | $90/m² |
| Planter Box Waterproofing Built-in planter box membrane and drainage | $500/job | $900/job | $1500/job |
| Laundry Waterproofing Laundry wet area waterproofing membrane | $600/job | $900/job | $1400/job |
| Leak Investigation & Repair Find and fix existing water leak/ingress | $300/job | $800/job | $2000/job |
| Remedial Waterproofing Fix failed waterproofing (strip tiles, redo membrane) | $3000/job | $6500/job | $12000/job |
| Concrete Sealing Penetrating sealer on concrete surfaces | $15/m² | $22/m² | $35/m² |
| Expansion Joint Sealing Polyurethane expansion joint sealing | $30/lin.m | $50/lin.m | $80/lin.m |
Based on 12 data points from verified waterproofing professionals. All prices AUD including GST. Last updated March 2026.
New Waterproofing vs Remedial Repair
Getting waterproofing right the first time saves thousands. Remedial waterproofing — where failed membranes must be stripped back, tiles removed, and the entire system redone — costs 5 to 10 times more than doing the job correctly during initial construction or renovation. Always use a licensed waterproofer who provides a warranty and complies with AS 3740.
New Bathroom Waterproofing
$50–$90/m²
Membrane applied to prepared substrate, compliant with AS 3740, warranty included
Remedial Waterproofing
$3,000–$12,000/job
Strip tiles, remove failed membrane, repair substrate, reapply membrane, retile
Waterproofing Prices by Country
Compare waterproofing costs across 5 countries. Click for detailed city-level pricing.
🇦🇺
Australia
Bathroom, shower, balcony, roof, basement — AS 3740
From $800
🇬🇧
United Kingdom
Tanking, damp proofing, rising damp, DPC — BS 8102
From £200
🇺🇸
United States
Basement, French drains, sump pumps, foundation repair
From $250
🇨🇦
Canada
Foundation, weeping tile, ice dam prevention
From C$350
🇳🇿
New Zealand
Weathertightness, cladding repair, leaky building solutions
From NZ$350
Waterproofing Prices by State (Australia)
Prices vary by location. Click a state for detailed city-level pricing.
New South Wales
Sydney
Bathroom from $56/m²
Victoria
Melbourne
Bathroom from $54/m²
Queensland
Brisbane
Bathroom from $48/m²
South Australia
Adelaide
Bathroom from $49/m²
Western Australia
Perth
Bathroom from $55/m²
Tasmania
Hobart
Bathroom from $51/m²
ACT
Canberra
Bathroom from $52/m²
Northern Territory
Darwin
Bathroom from $59/m²
Waterproofing Price Trends (2024–2026)
Year-over-year average cost comparison
| Service | 2024 Avg | 2025 Avg | 2026 Avg | 2-Year Change |
|---|---|---|---|---|
| Bathroom Waterproofing (avg job) | $765 | $870 | $950 | +24.2% |
| Shower Recess Only | $900 | $1,050 | $1,150 | +27.8% |
| Balcony Membrane (per m²) | $72 | $80 | $90 | +25.0% |
| Flat Roof Coating (per m²) | $41 | $47 | $55 | +34.1% |
| Basement Tanking (avg job) | $4,900 | $5,400 | $6,000 | +22.4% |
| Laundry Waterproofing | $630 | $705 | $800 | +27.0% |
| Remedial Waterproofing | $5,250 | $6,100 | $7,000 | +33.3% |
| Leak Investigation | $335 | $415 | $500 | +49.3% |
Seasonal Timing Guide
| Season | Demand | Typical Wait | Pricing Notes |
|---|---|---|---|
| Summer (Dec–Feb) | High | 3–5 weeks | Renovation peak — bathroom renos drive steady demand |
| Autumn (Mar–May) | Moderate–High | 2–3 weeks | Best time for exterior work — dry weather, good curing conditions |
| Winter (Jun–Aug) | Low–Moderate | 1–2 weeks | Indoor bathroom work continues; exterior membrane curing is slower |
| Spring (Sep–Nov) | Very High | 4–6 weeks | Post-storm leak repairs spike; pre-Christmas renovation rush begins |
Supply & Demand Drivers
Remedial waterproofing demand has surged in Australian apartments built 2005–2015 as original membranes reach end of life. The apartment building boom of that era means a wave of balcony and bathroom failures now flowing through. Licensed waterproofers are in short supply nationally, with licensing requirements tightening in NSW and VIC.
2026–2027 Outlook
Waterproofing costs are expected to rise 6–9% through 2027, faster than most trades, driven by the remedial wave in multi-storey apartments and rising membrane material costs. Leak investigation fees have jumped as insurers increasingly require formal moisture reports before approving claims. Homeowners planning bathroom renovations should budget waterproofing as a line item, not an afterthought.
Regional Differences
Sydney has the highest waterproofing costs, 15% above national average, driven by high-density apartment remediation work. Melbourne follows at 10%. Brisbane and the Gold Coast see strong demand due to subtropical rainfall. Membrane material costs rose 8% nationally since 2024.
Common Waterproofing Jobs and Typical Pricing
| Job | Typical scope | Typical price | Timeframe |
|---|---|---|---|
| Waterproof standard bathroom before tiling | Prime, reinforce joints and apply membrane to floor and walls | $900-$2,200 | 1-2 days plus cure |
| Shower recess waterproofing only | Waterproof shower base and upstand walls in renovation | $800-$1,800 | 1 day plus cure |
| Shower rescreen leak-stop package | Remove screen as needed, re-detail junctions and waterproof high-risk shower edges | $900-$2,800 | 1-3 days |
| Balcony membrane replacement | Strip finish, repair substrate and apply external membrane | $80-$150/m² | 3-7 days |
| Laundry wet-area waterproofing | Floor and splash-zone membrane before tiling | $650-$1,500 | 1 day plus cure |
| Flat roof waterproof coating | Prep substrate and apply liquid membrane or coating | $45-$90/m² | 2-5 days |
| Basement positive-side tanking | Below-grade membrane and detailing to walls/slab junctions | $110-$260/m² | Several days |
| Retaining wall waterproofing | Excavate if needed, apply membrane and drainage protection to wall face | $55-$120/m² | 1-4 days |
| Leak investigation and report | Moisture tracing, testing and written diagnosis | $300-$1,200 | 2-5 hours |
| Remedial bathroom waterproofing after failure | Strip tiles, repair substrate, redo membrane and prepare for retiling | $3,500-$12,000 | 1-3 weeks |
| Planter box membrane install | Apply membrane, protection layers and drainage detailing | $600-$1,600 | 1-3 days |
| Swimming pool surround or wet-zone waterproofing | Detail wet-zone membrane interfaces around pools, podiums or tiled surrounds | $70-$160/m² | 2-5 days |
| Commercial wet-area waterproofing | Amenities, kitchens or plant areas with compliance documentation and higher traffic demands | $85-$180/m² | Several days to staged program |
| Expansion joint sealing | Prep joint and install polyurethane sealant | $30-$80/lin.m | Same day |
What Affects Waterproofing Price?
New work vs remedial work
New waterproofing is much cheaper because surfaces are open and ready. Remedial jobs often include demolition, drying time, defect tracing and substrate repair.
Area type and risk profile
Bathrooms, balconies, roofs, basements and planter boxes each fail in different ways, so labour, detailing and testing requirements vary substantially by location.
Membrane type and compliance detail
Liquid membranes, sheet systems and trafficable coatings all have different material and labour profiles. Corners, puddle flanges and movement joints also affect pricing.
Existing damage and substrate condition
Cracked screeds, poor falls, damp masonry, rusting reinforcement and contaminated surfaces all need fixing before a membrane can be applied properly.
Access and location
Occupied apartments, balconies above living areas, roofs with limited access and below-grade spaces usually cost more because access is slower and failure risk is higher.
Cure time and sequencing with other trades
Waterproofing often looks simple, but the real cost includes waiting for primers, membranes and flood tests before tiling or screeding can continue.
Testing, certification and warranty
Some jobs require photos, compliance statements, flood testing or longer warranty documentation, especially in strata and commercial-adjacent work.
Included vs Extra
Usually included
- Standard priming and membrane application in the quoted area
- Reinforcing corners and penetrations where specified
- Normal residential labour during business hours
- Basic site cleanup of waterproofing materials
- GST on residential Australian pricing
Often extra
- Demolition, tile removal and disposal
- Screed repair, re-falling or crack repair
- Flood testing, reports or compliance documentation
- Trafficable protection layers or toppings
- Urgent leak-tracing or after-hours access
DIY vs Professional
| Task | DIY | Pro cost | Verdict |
|---|---|---|---|
| Seal a hairline non-structural joint | Possible with the correct sealant and prep on very small maintenance items | $150-$400 | DIY only on minor sealant work |
| Apply bathroom waterproof membrane | Compliance, detailing and cure mistakes are common | $800-$2,500+ | Use a professional |
| Trace an active leak | Very hard to diagnose accurately without experience and moisture testing | $300-$1,200 | Professional preferred |
| Seal existing concrete externally | Possible on simple clean surfaces if the right product is used | $15-$35/m² | DIY can work |
How to Save Money on Waterproofing
Waterproof before the failure reaches adjacent rooms
Early intervention is cheaper than waiting until ceilings, skirtings or neighbour properties are affected.
Coordinate waterproofing with tiling and plumbing
Good sequencing reduces return visits and the risk of the membrane being damaged by later trades.
Clarify whether substrate repair is included
Many cheap quotes exclude fixing falls, cracks or wet substrate issues that must be resolved before waterproofing.
Take photos before finishes go on
Photo records help with warranty claims and future remedial work if a leak develops later.
Do not choose purely on headline square-metre rate
Corners, hobs, puddle flanges and membrane system quality matter more than a seemingly cheap per-metre number.
Ask whether a flood test is worthwhile
For bathrooms and balconies, a flood test can be cheap insurance compared with the cost of a concealed leak.
Seasonal Guide
Summer
Warm weather can help cure times, but direct sun and hot substrates must still be managed carefully.
Autumn
A good window for bathrooms, balconies and roof work because temperatures are moderate and sequencing is easier.
Winter
External membranes and remedial leak jobs can slow down in wet weather because surfaces need to be dry before application.
Spring
Renovation activity rises, so waterproofers and tilers often book out together.
City-Specific Context
Sydney
Strata bathrooms and balconies are a major source of remedial waterproofing demand, especially in older apartment stock.
Melbourne
Cooler, wetter conditions make balcony and roof waterproofing sequencing especially important.
Brisbane
Subtropical storms expose defects quickly, so balconies, podiums and roof membranes are common problem areas.
Perth
Strong sun and heat affect membrane selection, especially on exposed external surfaces.
Warranty and Guarantee Guide
Material warranty
Membrane manufacturers may offer a product warranty, but it only helps if the installer followed the system specification, thickness requirements and substrate prep rules.
Workmanship warranty
Your contractor should state what parts of the installation they warrant, for how long, and what maintenance or misuse exclusions apply after handover.
Documentation that protects you
Keep the quote, product names, batch photos, substrate notes and any flood-test records. Those documents matter more than a vague promise if a leak appears later.
Guarantees vs realistic maintenance
No honest contractor should imply that sealants, joints and exposed trafficable coatings will never need maintenance. The warranty should reflect how the system is actually used.
Australian Standards and Compliance
NCC and wet-area compliance
Wet-area waterproofing in homes should align with the current National Construction Code requirements and the domestic wet-area standard used for bathrooms, laundries and similar spaces.
AS 3740 context
AS 3740 is the key domestic wet-area reference that drives detailing expectations around shower zones, wall heights, junctions, penetrations and floor wastes.
External and below-ground systems
Balconies, roofs, basements and retaining walls often involve different system standards and manufacturer details, so the quote should identify the intended membrane build-up rather than using one generic phrase.
Why standards affect price
Compliance is not just paperwork. It changes membrane thickness, reinforcement, curing, testing and the amount of edge and penetration detailing the installer must complete.
What to Ask Before Waterproofing Starts
Which membrane system is being used?
A quote should identify whether the system is liquid-applied, sheet-based or trafficable, and where it is suitable.
What substrate prep is required?
If falls are wrong, cracks are active or surfaces are still damp, the membrane cannot simply be painted over the problem.
How long is the cure and flood-test window?
This affects when tilers, plumbers or balcony finishes can return and is one of the most common sources of schedule pressure.
What warranty records will you receive?
Photos, product data and the written scope are valuable if a leak appears later or if strata asks for proof of works.
Who is protecting the membrane afterward?
Many failures happen after the membrane is installed but before tiling or topping finishes are completed. Clarify trade sequencing and protection.
If the project is in a bathroom renovation, ask whether photos will be taken at each stage before tiles cover the membrane. That small record can be extremely useful if a defect appears years later.
Waterproofing fails most often at penetrations, movement joints and edges, not on big easy-to-coat open areas. That is why experienced detailing and careful sequencing matter as much as the membrane brand on the bucket.
Waterproofing Membrane Types Compared
The right membrane depends on where it's going and what's going over it
| Membrane Type | Cost | Lifespan | Best For | Limitations |
|---|---|---|---|---|
| Liquid-Applied Polyurethane | $50–$90/m² | 15–25 years | Bathrooms, showers, laundries — conforms to complex shapes around drains and penetrations | Needs 24–72hr cure; sensitive to humidity during application |
| Liquid-Applied Acrylic | $40–$70/m² | 10–15 years | Internal wet areas, low-traffic zones, budget bathroom renovations | Less flexible than polyurethane; not ideal for external use |
| Sheet Membrane (Torch-On) | $70–$120/m² | 20–30 years | Flat roofs, large balconies, podium decks, commercial applications | Open-flame application; harder to detail around penetrations |
| Sheet Membrane (Peel-and-Stick) | $60–$100/m² | 15–20 years | Below-grade walls, retaining walls, basement tanking | Requires very clean, dry substrate; joins are potential weak points |
| Cementitious Coating | $35–$60/m² | 10–15 years | Concrete tanks, planter boxes, below-grade external walls | Rigid — not suitable where movement or cracking is expected |
| Epoxy/Polyurea Hybrid | $90–$150/m² | 20+ years | High-traffic balconies, trafficable roofs, car parks, commercial | Specialist application; highest cost; fast cure but temperature-sensitive |
Key takeaway: For most residential bathrooms, liquid-applied polyurethane is the standard choice — it's flexible, conforms to drains and corners, and provides 15–25 years of protection when properly installed. For external balconies and roofs, torch-on sheet membranes offer superior durability but cost more. The membrane itself is typically 30–40% of the total waterproofing cost — the rest is substrate preparation, priming, reinforcing tape at joints, and curing time.
Waterproofing Costs by City
How waterproofing prices compare across Australia’s major metros
Sydney
Sydney is Australia’s most expensive waterproofing market. Strata apartment remediation dominates — buildings from the 2005–2015 boom are now requiring full balcony and bathroom membrane replacement. Inner-city access restrictions and strata approval processes add time and cost. Bathroom waterproofing averages $60–$95/m², with remedial jobs starting at $5,000+.
Melbourne
Melbourne waterproofing costs are 10% above the national average. The city’s variable weather — rain, heat, and frost cycles — is particularly hard on external membranes. Balcony waterproofing failures are common in older inner-suburb apartments. Melbourne’s strong renovation market keeps bathroom waterproofers busy year-round, with 3–4 week lead times typical.
Brisbane
Brisbane’s subtropical climate creates unique waterproofing challenges. Heavy afternoon storms and humidity demand robust external membranes and drainage detailing. Costs are near the national average at $48–$82/m² for bathroom work. The flood-prone river suburbs (West End, Milton, Graceville) see high demand for basement and subfloor waterproofing after wet seasons.
Perth
Perth waterproofing costs are slightly above average, influenced by mining-sector labour competition. The dry climate means exterior waterproofing failures show up slowly, but when they do appear, the damage is often extensive. Reactive clay soils in many Perth suburbs cause ground movement that stresses below-grade membranes. Roof waterproofing is in strong demand for flat-roofed commercial properties.
Adelaide
Adelaide offers some of Australia’s most competitive waterproofing rates at $45–$78/m² for bathroom work. Shorter lead times (1–2 weeks) and lower overhead costs keep pricing accessible. The city’s older housing stock in suburbs like Unley, Norwood, and Prospect means rising demand for remedial bathroom waterproofing in homes built before modern standards.
Hobart
Hobart waterproofing costs are 5–10% above the national average due to a smaller contractor pool and higher freight costs for specialist membranes. Tasmania’s cold, wet climate makes external waterproofing particularly critical — freeze-thaw cycles stress membranes and cause premature failure if inferior products are used. Bathroom waterproofing averages $55–$88/m². Heritage homes in Battery Point and Sandy Bay often need careful remedial work to address decades of moisture ingress.
Canberra
Canberra sits 10–15% above the national average for waterproofing, driven by high labour costs and the city’s extreme temperature swings (sub-zero winters to 35°C+ summers). External membranes on balconies and flat roofs must withstand significant thermal cycling, requiring premium flexible systems. Bathroom waterproofing averages $58–$92/m². New suburbs in Gungahlin and Molonglo Valley are driving demand for new-build waterproofing as the housing supply catches up with population growth.
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Get Free Quotes in Your Area →Common Questions
How much does waterproofing cost in Australia?
Waterproofing costs in Australia vary significantly by the type of work. Bathroom waterproofing typically costs $50–$90 per square metre for the membrane application, with an average bathroom (6–8m²) costing $400–$720 for the waterproofing membrane alone. Shower recess waterproofing runs $800–$2,000 per job. Balcony and deck waterproofing is $60–$120/m² due to additional complexity and drainage requirements. The most expensive work is remedial waterproofing ($3,000–$12,000) where failed membranes must be completely stripped and redone. Always get at least 3 quotes from licensed waterproofers who hold the appropriate state licence.
Is waterproofing mandatory in wet areas?
Yes — waterproofing of wet areas is mandatory under the National Construction Code (NCC) and Australian Standard AS 3740-2021 (Waterproofing of domestic wet areas). All shower recesses, bathroom floors, laundry floors with floor wastes, and balconies above habitable rooms must be waterproofed by a licensed waterproofer. The membrane must extend at least 150mm up walls in wet areas and 1800mm in shower zones. A waterproofing certificate must be issued before tiling can commence. Failure to comply can result in building defect claims, insurance issues, and council enforcement action.
How long does waterproofing last?
Quality waterproofing membranes installed correctly should last the lifetime of the tiled surface — typically 15–25 years for a bathroom. Liquid-applied polyurethane membranes generally last 10–15 years on external surfaces like balconies and roofs, depending on UV exposure and foot traffic. Sheet membranes (torch-on or peel-and-stick) can last 20+ years when properly installed. The most common cause of premature waterproofing failure is poor installation — incorrect priming, insufficient membrane thickness, inadequate reinforcing at corners and joints, or tiling before the membrane has fully cured. Always use a licensed waterproofer with a minimum 7-year warranty.
What are signs of failed waterproofing?
Common signs of failed waterproofing include: water stains or damp patches on ceilings below bathrooms, bubbling or peeling paint on walls adjacent to wet areas, musty odours indicating hidden moisture, loose or lifting tiles in showers or bathrooms, efflorescence (white salt deposits) on concrete or grout, swollen or warped skirting boards near wet areas, and visible mould growth in unexpected locations. If you notice any of these signs, get a leak investigation done promptly — water damage compounds rapidly and repair costs escalate significantly the longer the problem persists. A leak investigation typically costs $300–$2,000 depending on complexity and access requirements.
Can you waterproof over existing tiles?
In some cases, yes — there are specialist waterproofing systems designed to be applied over existing tiles, avoiding the cost and disruption of tile removal. These systems use flexible membranes that bond to the existing tile surface, with new tiles or a coating applied over the top. However, this approach is not suitable for all situations — the existing tiles must be firmly bonded, the substrate must be structurally sound, and the additional height buildup (typically 10–15mm) must be manageable at door thresholds and shower entries. Over-tile waterproofing costs $80–$130/m² including the membrane and surface preparation. For severely damaged or leaking wet areas, full strip-and-redo remedial waterproofing ($3,000–$12,000) is usually the better long-term solution.
What is the difference between liquid and sheet membranes?
Liquid membranes are painted or rolled onto surfaces and cure to form a seamless, flexible coating. They are the most common choice for bathroom waterproofing in Australia because they conform to complex shapes around drains, corners, and penetrations. Sheet membranes (torch-on bituminous or peel-and-stick) are typically used for larger flat areas like roofs, balconies, and basement walls where a thicker, more durable barrier is needed. Sheet membranes are generally more expensive to install ($70–$120/m² vs $50–$90/m² for liquid) but offer superior longevity on external surfaces. Your waterproofer will recommend the appropriate system based on the application.
Do I need a licensed waterproofer?
In most Australian states, waterproofing of wet areas must be carried out by a licensed waterproofer or a builder holding the appropriate licence class. In NSW, a specific waterproofing licence is required. In VIC and QLD, it falls under the builder’s licence but must still comply with AS 3740. Using an unlicensed waterproofer voids the warranty, may not be covered by insurance, and can create issues when selling the property. Always ask to see the waterproofer’s licence number and verify it with your state’s licensing authority before work begins.
How long does waterproofing take to cure?
Liquid waterproofing membranes typically require two coats with a minimum 4-hour drying time between coats, then 24–72 hours of full cure time before tiling can begin. The exact cure time depends on temperature, humidity, and membrane thickness. In winter or in poorly ventilated spaces, cure times can extend to 5–7 days. Rushing this process is the most common cause of waterproofing failure. A flood test (filling the area with water for 24 hours) may be required before tiling, adding another day. Total waterproofing time for a standard bathroom is typically 2–4 days including the flood test.
What is a flood test and is it required?
A flood test (also called a ponding test) involves plugging the floor waste and filling the waterproofed area with water to a depth of 25–50mm for 24 hours. The water level is marked and checked after 24 hours — any drop indicates a leak in the membrane. Flood testing is required under AS 3740 for shower recesses and is strongly recommended for all wet area floors. Some councils and certifiers mandate it before issuing a waterproofing certificate. The test costs nothing extra if done by the waterproofer as part of the job, but finding a leak at this stage saves thousands compared to discovering it after tiling is complete.
Are waterproofing prices going up in 2026?
Yes — waterproofing costs have risen 18–25% over the past two years and are expected to increase a further 6–9% through 2027. The main drivers are: a national shortage of licensed waterproofers, a wave of remedial work in apartments built during the 2005–2015 boom, rising membrane material costs, and tighter licensing requirements in NSW and VIC. Leak investigation fees have also jumped as insurers require formal moisture reports. Homeowners planning renovations should budget waterproofing as a specific line item, not an afterthought added to the tiling quote.
Can I claim waterproofing on insurance?
Home insurance typically covers sudden and accidental water damage (like a burst pipe) but not gradual deterioration or maintenance failures. If your waterproofing has slowly degraded over time, the remedial work is unlikely to be covered. However, if a sudden event caused the damage, your insurer may cover investigation and repair costs. Strata insurance for apartments often covers common property waterproofing failures (balconies, roofs) but not individual lot bathrooms. Always document damage with photos and get a professional leak investigation report — insurers are more likely to approve claims with documented evidence from a licensed waterproofer.
How do I choose between repair and full replacement?
If the leak is localised to a specific point (like a failed drain puddle flange or cracked silicone at a screen junction), a targeted repair ($300–$2,000) may be sufficient. However, if the membrane is old (15+ years), if there are multiple leak points, or if moisture mapping shows widespread dampness, full remedial waterproofing ($3,000–$12,000) is usually more cost-effective long term. Patching an old membrane often leads to repeated failures at new weak points. A good waterproofer will provide a moisture map and honest assessment — be wary of anyone who quotes a cheap patch without investigating the full extent of the problem.
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How We Get These Prices
Prices aggregated from 125+ verified quotes and published rate cards from licensed waterproofing specialists across Australia, the UK, USA, Canada, and New Zealand. Based on 230 data points across 58 providers in 33 cities, covering bathroom waterproofing, balcony membranes, basement tanking, roof coatings, and shower resealing.
Methodology: We collect quotes from licensed waterproofing contractors, cross-reference with membrane manufacturer pricing and Australian Standards compliance requirements, and verify against completed project invoices. We track per-square-metre rates by application type and membrane system. Data last verified March 2026, refreshed quarterly.
All prices are indicative guides. Your actual cost depends on area size, membrane type, substrate condition, and compliance requirements. We recommend getting at least three quotes before committing.