Wet Area Plastering in NSW?
Tell us the room, whether existing lining is coming out and if there is water damage and we'll connect you with New South Wales plasterers.
Free · No obligation · NSW-wide
Typical Wet Area Plastering Costs NSW
Supply and fix wet area sheeting, per m2$45 - $95
Fibre cement sheeting, per m2$60 - $120
Tile backer board, per m2$80 - $160
Strip existing lining, per m2$25 - $60
Water damaged wall repair$600 - $4,000
Full bathroom resheet$1,800 - $5,000
Framing repair or noggings$300 - $2,500
Laundry or powder room$900 - $2,800
Figures on this page are indicative 2026 NSW estimates only and vary with room size and layout, sheeting grade and thickness selected, framing condition and whether noggings or stud correction are required, the extent of water damage found once the existing lining is removed, access and disposal, and whether waterproofing and tiling follow as part of the same scope. Quotes should always be obtained for your specific property. Building, licensing and consumer protection requirements are set by legislation, the National Construction Code and Australian Standards and are periodically updated, so confirm the current position with the relevant authority and your contractor before relying on any figure.
Wet Area Plastering Services NSW 2026 - Get Quotes
Standard plasterboard in a shower is a defect, not a saving. Wet areas need lining rated for the exposure, and using ordinary sheet because it was on the truck creates a wall that degrades behind the tiles with nothing visible until the tiles start drumming or the skirting swells. The grade marking is printed on the back of every sheet, which makes this one of the few things a homeowner can check personally before it disappears behind a membrane. Sheeting also carries the membrane and the tiles above it, so a wall fixed at the wrong centres or missing noggings moves under load and takes the waterproofing with it. Ask what grade is going up and at what centres. Two other things are worth settling before sheeting starts. Tell the plasterer what size tiles you intend to use, because large format tiles magnify any deviation in the wall as lipping between tiles and adhesive cannot correct it. And build a contingency into the budget if existing lining is coming out, since water damage discovered at strip out is the most common reason a bathroom number moves. Post your job on The Quote Yard to reach New South Wales plasterers.
At a Glance - Sheeting Options Compared
| Sheeting | Cost per m2 | Suits | Strength | Limitation |
|---|---|---|---|---|
| Water resistant plasterboard | $45 - $95 | Most domestic bathrooms | Familiar, quick, cost effective | Still paper faced |
| Fibre cement sheet | $60 - $120 | Showers, heavy exposure | Unaffected by water | Heavier, harder to cut |
| Tile backer board | $80 - $160 | Large format tiles, wet rooms | Stable, takes weight well | Highest material cost |
| Standard plasterboard | Lower | Dry areas only | Cheapest | A defect in a wet area |
| Existing lining retained | Nothing | Sound, correct grade only | Avoids strip cost | Condition often unknown |
| Villaboard or similar | $60 - $120 | Showers and wet walls | Proven in Australian bathrooms | Fixing detail matters |
The One Thing You Can Check Yourself
Almost everything that goes wrong in a bathroom is hidden by the time the job finishes, which makes the sheeting stage unusual.
Plasterboard and fibre cement sheets carry printed markings on the back face identifying the product and its grade, and those markings are visible for the day or two between the sheets going up and the waterproofer arriving. A homeowner who walks into the room during that window and photographs the back of a sheet, or reads the branding on the offcuts in the skip, has verified something that no amount of asking later can establish. Water resistant plasterboard is visually distinct from standard sheet in most ranges, and fibre cement is obvious by weight and texture.
Several other things are checkable in the same window and worth the same five minutes. Look at whether noggings have been installed where sheet edges meet, since unsupported joints flex and crack later. Look at the fixing spacing along studs and at sheet edges. Look at the gap left at the floor, because sheeting run hard into a wet floor wicks moisture upward. Check that cut edges around penetrations are neat rather than ragged, since the waterproofer has to seal around them. None of this requires expertise, only timing, and it is the last opportunity to raise a question before everything disappears behind a membrane and a wall of tiles. Waterproofing follows at bathroom waterproofing.
Choosing the Right Sheeting Grade
Water resistant plasterboard at $45 to $95 a square metre covers most domestic bathroom walls outside the shower itself. It is the common specification and it is appropriate in the right places. Fibre cement sheet at $60 to $120 is unaffected by water and suits shower enclosures and heavily exposed walls. Grade markings on the back face settle the question. Water resistant plasterboard is visually distinct from standard sheet.
Weight and cutting make it slower to install. Tile backer board at $80 to $160 offers dimensional stability and carries large format tile weight well. Wet rooms and heavy tiling justify that additional cost. The membrane above never compensates for a poor sheet below. Fibre cement is obvious by weight and texture alone.
Standard plasterboard has no place in a wet area regardless of what goes over it. The membrane above does not compensate for the sheet below. Grade markings are printed on the back face of every sheet and readable before lining is covered. Plastering work more broadly sits at plastering and gyprock repairs. A gap at the floor stops the sheet drawing moisture upward.
Different grades on different walls in one room is normal rather than a compromise. Exposure genuinely varies from wall to wall within a bathroom. Sheeting has to suit both the waterproofing above it and the tile adhesive after that. Laying tiles over it sits at bathroom tiling. Corrosion resistant fixings are specified for a reason in wet areas.
| Location | Typical Grade | Why |
|---|---|---|
| Shower enclosure walls | Fibre cement or backer board | Heaviest direct exposure |
| Bathroom walls outside shower | Water resistant plasterboard | Splash and not soaking |
| Bathroom ceiling | Water resistant grade | Condensation collects there |
| Behind a bath | Water resistant minimum | Splash and overflow |
| Laundry walls | Water resistant grade | Appliance leaks, humidity |
| Wet room, no hob | Fibre cement or backer board | Whole room is the shower |
Fixing Centres, Noggings and Joints
Sheeting is fixed at specified centres along studs and around sheet edges, and those spacings come from the manufacturer and AS 2589. Wider spacing than specified allows flex. Noggings support sheet edges where they meet between studs, and joints without them flex under load. Manufacturers publish fixing schedules for each product. Water travels along sheets and down framing well past the stain.
That flex cracks tiles and tears membranes. Stud spacing may need reducing where heavy tiles or large format sheets are going on. Framing and stud work sits at carpentry services. Unsupported joints are what crack tiles a year later. Decayed framing is a structural question rather than a lining one.
A gap at the floor stops the sheet wicking moisture upward from a wet slab or screed. Sheeting run hard down draws water in. Cut edges around taps, wastes and penetrations need to be neat because the waterproofer seals around each one. Ragged oversized cuts make that job considerably harder. Services inside the wall have to be set before sheeting covers them.
Fixings must be the correct type for the sheeting rather than whatever is in the gun. Corrosion resistance matters in a wet area. Joints are set and finished differently in wet areas than in dry ones. Ceiling lining sits at ceiling repairs. Packing or planing a stud costs very little at the right moment.
| Detail | Why It Matters | Common Shortcut |
|---|---|---|
| Fixing centres | Controls flex under load | Spacing stretched out |
| Noggings at sheet edges | Supports unbacked joints | Omitted entirely |
| Stud spacing | Heavy tiles need more support | Left as framed |
| Floor gap | Stops moisture wicking up | Sheet run hard down |
| Fixing type | Corrosion in a wet area | Standard screws used |
| Neat penetration cuts | Waterproofer seals around them | Ragged oversized holes |
Water Damaged Lining and Deciding What Comes Out
Where a bathroom has leaked, the question is not whether the lining is damaged but how far that damage extends beyond what is visible.
Paper faced plasterboard that has been repeatedly wet loses strength and provides a food source for mould, and the affected zone almost always extends further than the staining suggests because water travels along the sheet and down the framing. A useful rule when opening up is that lining should be removed well past the last sign of damage instead of cut back to the edge of the stain, since anything marginal left in place becomes the weak point in a new wall. Several indicators help. Sheeting that feels soft or gives under thumb pressure has lost integrity. Fixings that have corroded or pulled through signal sustained wetness. Framing that is dark, soft or smells musty needs assessing separately, and timber that has decayed is a structural question rather than a lining one. Mould on the back face of removed sheets tells you how long it has been going on. Two practical points follow. Discovery during strip out is the most common reason a bathroom budget moves, so building a contingency into the number before starting is realistic and not pessimistic. And where damage is extensive, treating the cause before rebuilding matters more than the rebuild itself, since a new lining over an unresolved leak fails the same way. Mould work sits at mould remediation.
Repairing Water Damaged Walls
Water damaged lining repair at $600 to $4,000 depends almost entirely on how far the damage reaches. Visible staining understates the true extent almost every time. Sheeting should be removed well past the last sign of damage rather than cut to the edge of a stain. Staining understates how far the water actually travelled. Undersized fans leave vapour in the room between uses.
Marginal material left in place becomes the new weak point. Sheeting that feels soft under thumb pressure has lost its integrity regardless of appearance. Corroded or pulled fixings say the same thing. Soft sheeting has lost its integrity whatever it looks like. Bathrooms in older regional housing often have no wet area grade at all.
Framing that is dark, soft or smells musty needs separate assessment, since decayed timber is a structural matter. An independent assessment sits at building inspection. Mould on the back face of removed sheets shows how long the problem has been running. Treating it sits at bathroom mould removal and prevention. Strip out is where a bathroom budget most often moves.
A new lining over an unresolved leak fails in exactly the same way as the old one. Finding and fixing the source has to come first. Damp arriving from outside the bathroom is a different problem again. That sits at wall damp treatment. Manufacturer warranties depend on following the published fixing schedule.
Where Sheeting Sits in the Bathroom Sequence
Demolition comes first, stripping the room back to framing and revealing whatever the previous work left behind. Stripping the room back sits at bathroom demolition. Rough in plumbing and electrical follow, because pipes and cables inside walls must be positioned before anything closes up. Rough in has to be finished before anything closes up.
Plumbing sits at bathroom renovation plumbing. Framing correction and noggings go in next, once services are set and before sheeting covers them. This is the last chance to fix a bowed stud. A plasterer arriving before rough in creates a scheduling problem.
Sheeting then goes up, and that is the window when grade and fixing can still be verified. That window closes within a day or two. Waterproofing follows the sheeting and cures before tiling starts. Membrane systems of all kinds sit at waterproofing services.
Tiling, then fit off, complete the room. Tiling is otherwise covered at tiling services. A plasterer arriving before rough in is complete is a scheduling problem worth raising. The order of trades matters more than the speed of them.
| Stage | What Happens | Last Chance To |
|---|---|---|
| Demolition | Back to framing | See the real condition |
| Rough in services | Pipes and cables set | Move a tap or outlet |
| Framing and noggings | Support corrected | Fix a bowed stud |
| Sheeting | Lining fixed | Verify grade and centres |
| Waterproofing | Membrane applied | Photograph coverage |
| Tiling and fit off | Room finished | Nothing is visible now |
Flat Walls Matter More Than People Expect
A wall that looks acceptable under paint becomes obvious under tiles, and large format tiles are unforgiving in a way that smaller ones are not. A bowed stud or a twist in the framing produces a wall out of plane, and where a tile is six hundred millimetres or more across, that deviation shows as lipping between tiles that no amount of adhesive can correct. Older housing across New South Wales makes this common, since hardwood framing in a house built before the war has often moved considerably, and a bathroom in a Sydney terrace or a Newcastle cottage frequently has walls out of plumb by an amount that only becomes a problem when somebody decides on large tiles. Several approaches exist. Packing or planing individual studs corrects modest deviation and costs very little at framing stage. Battening over the existing framing creates a new plane and loses a small amount of room width. Replacing a bowed stud is sometimes the cleanest answer. Levelling with adhesive during tiling is the expensive and unreliable option that gets chosen when the problem is discovered too late. Two consequences follow for a homeowner. Raise the tile size early, because it changes what the framing needs to be. And where a plasterer says walls need attention before sheeting, that is usually a real observation instead of an upsell. Framing work sits at carpentry services.
Five Minutes While the Sheets Are Still Visible
The gap between sheeting going up and the waterproofer arriving is the only point in a bathroom renovation where the structure behind the finish is visible, and it usually lasts a day or two. Walking in during that window costs nothing and settles questions that cannot be answered afterwards. Photograph the back face markings on a sheet or read the branding on offcuts in the skip, which identifies the product and grade. Look at whether noggings have gone in where sheet edges meet between studs. Count fixings along a stud and check the spacing looks consistent rather than stretched. Look at the bottom of the sheets and check a gap has been left above the floor and not the lining being run hard down into it. Inspect the cuts around tap penetrations and the waste outlet and see whether they are neat. Run a straightedge or a long level across the wall and look for daylight underneath, which shows how flat the wall actually is before tiles reveal it. Check the ceiling and check the grade used there matches the walls. Photograph every one of those with the date attached. Two things this achieves. Any question raised now is cheap to resolve, where the same question after tiling is not. And a dated record exists if a problem emerges in two years. Independent checks sit at building inspection.
Framing, Flatness and Tile Size
A wall that passes under paint can be plainly out of plane under tiles. Tiles are far less forgiving than a painted finish. Large format tiles magnify any deviation, showing it as lipping between adjacent tiles. Deviation that is invisible under paint becomes lipping under tiles.
Adhesive cannot correct a wall that is out of plane. Older hardwood framing across New South Wales has frequently moved over decades. Terraces and pre war cottages are the usual cases. Correction at framing stage costs a fraction of correction later.
Planing back a stud individual studs corrects modest deviation cheaply at framing stage. Later correction costs many times more. Battening over existing framing creates a new plane at the cost of a little room width. That trade off is frequently worth making in a small room.
Raise the intended tile size early, since it changes what the framing needs to be. Planning the whole room sits at bathroom renovation. A plasterer flagging wall issues before sheeting is usually making a real observation. Laundry rooms and their linings sit at laundry renovation.
Why New Linings Fail Early in Apartments
A wet area lining installed correctly should last as long as the bathroom, and where one degrades within a few years the cause is usually the air rather than the water.
Bathrooms generate large volumes of water vapour, and a room that cannot clear that vapour stays damp between uses. Paper faced lining above the tile line, the ceiling in particular, absorbs that moisture repeatedly, and mould follows on the surface and eventually behind it. The pattern is strongest in apartments, where windows are often small or absent, exhaust fans are frequently undersized for the room volume, and a great many fans discharge into a ceiling cavity instead of to outside, which relocates the vapour into the roof space instead of removing it. Older walk up blocks across Sydney commonly have passive vents that were adequate for a smaller shower in a different era. Several things help. Sizing the fan to the room volume rather than fitting whatever is stocked makes a measurable difference. Ducting to outside and not into a cavity is the single most important detail. Running the fan for a period after showering rather than switching it off on the way out clears the residual vapour. And specifying water resistant grade on the ceiling as well as the walls costs little and addresses where condensation actually collects. Ventilation sits at bathroom ventilation.
| Sign | What It Indicates | Action |
|---|---|---|
| Sheeting soft under thumb | Integrity already lost | Remove well past it |
| Corroded or pulled fixings | Sustained wetness | Assess framing too |
| Dark or soft framing | Possible timber decay | Structural assessment |
| Mould on removed sheet backs | Long running problem | Treat cause first |
| Swollen skirting or architrave | Water reaching the base | Open up and check |
| Drumming tiles | Lining moving behind | Full investigation |
The Sheeting Brands Used in Australian Bathrooms
Wet area lining comes from a small number of manufacturers, and naming the product in a quote settles the grade question before it becomes an argument.
On water resistant plasterboard, CSR Gyprock supplies Aquachek, Knauf supplies its moisture resistant range and USG Boral competes across the same applications. For fibre cement, James Hardie Villaboard remains the reference product in Australian bathrooms, with Scyon and HardieGlaze covering adjacent applications, and Cemintel supplies alternatives. Tile backer boards include James Hardie products alongside imported systems such as Wedi and Schluter Kerdi Board, which combine substrate and waterproofing in one. Compounds, adhesives and jointing systems come from CSR, Knauf and Ardex, and the wet area grade matters there as much as in the sheet itself. Fixings from Buildex and similar need to be the corrosion resistant type specified for the sheeting. A few things matter more than the brand. Manufacturers publish fixing centres, nogging requirements and maximum tile weights for each product, and those figures are the specification instead of a suggestion. Mixing a sheet from one system with compounds from another occasionally causes problems. And a product marked on the back face can be verified by anybody, which is precisely why the marking is printed there. Plastering generally sits at plastering and gyprock repairs.
| Ask Every Plasterer | Why It Matters | A Good Answer |
|---|---|---|
| What grade is going where | Exposure varies by wall | Named per location |
| What fixing centres | Controls flex under tiles | A figure, not a shrug |
| Are noggings included | Supports sheet edges | Yes, at every joint |
| Is framing correction priced | Discovered late costs more | Assessed beforehand |
| What tile size are you allowing for | Changes support needs | Confirmed with you |
| What if damage is found | Budgets move at strip out | A stated rate |
| Item | Cost | Note |
|---|---|---|
| Water resistant plasterboard, per m2 | $45 - $95 | Most bathroom walls |
| Fibre cement sheet, per m2 | $60 - $120 | Shower enclosures |
| Tile backer board, per m2 | $80 - $160 | Large format, wet rooms |
| Strip existing lining, per m2 | $25 - $60 | Including disposal |
| Full bathroom resheet | $1,800 - $5,000 | Strip and refix |
| Framing repair and noggings | $300 - $2,500 | Usually discovered |
Ventilation and the Life of a Lining
A correctly installed wet area lining should last as long as the bathroom does. Failure within a few years points at the air rather than the water. Bathrooms generate large volumes of vapour, and a room that cannot clear it stays damp between uses. Ducting to outside rather than a cavity is the key detail.
Paper faced lining absorbs that repeatedly. Ceilings collect condensation more than walls do, which is why ceiling grade matters. Water resistant grade there costs very little. Ceiling grade matters because condensation tends to collect there first.
Apartments suffer most, with small or absent windows and fans undersized for the room. Regrouting sits at shower regrouting and leak repairs. A fan discharging into a ceiling cavity relocates vapour into the roof space and not removing it. Three separately engaged trades leave gaps between their scopes.
That is a common and consequential fault. Running a fan after showering rather than switching it off clears the residual vapour. Finishing and painting sits at painting services. Photographs taken at each stage substitute for single responsibility.
Who Owns the Result Across Three Trades
A bathroom wall is built by a plasterer, sealed by a waterproofer and covered by a tiler, and where those are three separate engagements the gaps between them become the owner's problem. The plasterer fixes the lining and leaves, and whether the grade, centres and noggings were right is not something the waterproofer checks or is paid to check. The waterproofer applies a membrane over whatever they find, and a lining that flexes will crack the membrane later regardless of how well it was applied. The tiler then covers both. When water appears two years on, establishing which trade caused it is difficult and each has a reasonable account of their own work. Several arrangements reduce that risk. A builder coordinating all three carries the coordination responsibility, which is part of what a builder's margin buys. A single contractor offering sheeting, waterproofing and tiling as one scope gives one party to go back to. Where trades are separately engaged, the owner is the coordinator whether they intended to be or not, and photographing each stage before the next covers it is the practical substitute for a single point of responsibility. Two questions worth asking directly. Who checks the sheeting before the membrane goes on. And who is responsible if the membrane cracks because the wall moved. Renovation coordination sits at bathroom renovation.
Regional Considerations Across New South Wales
Sydney apartments combine limited ventilation, small bathrooms and strata constraints on what can be changed. All three of those shape the specification required. Inner suburb terraces frequently have hardwood framing that has moved over a century. Flatness work belongs in the quote there. Coastal humidity along the Central Coast and Northern Beaches keeps ambient moisture higher year round. Ventilation matters a great deal more in those coastal areas.
Cold winters in the Blue Mountains and Southern Highlands drive condensation onto cold surfaces. Ceiling grade and insulation both help. Older housing across regional New South Wales frequently has original bathrooms with no wet area grade at all. Those rooms generally need resheeting from one end to the other.
| Situation | What It Means | Practical Response |
|---|---|---|
| Sydney apartment | Poor ventilation, small room | Fan sizing and ducting first |
| Inner suburb terrace | Framing has moved | Price flatness correction |
| Coastal humidity | Higher ambient moisture | Stronger extraction |
| Cold region | Condensation on cold surfaces | Ceiling grade, insulation |
| Original older bathroom | No wet area grade at all | Full resheet |
| Large format tiles planned | Framing must be flat | Raise it before sheeting |
What the Standards Require of a Wet Area Wall
Wet area lining sits under two Australian Standards at once, and knowing what each covers makes a quote easier to interrogate.
AS 2589 deals with gypsum lining, covering the application of plasterboard including fixing methods, centres, jointing and the support the lining needs behind it. AS 3740 deals with waterproofing of domestic wet areas, and although it is usually thought of as the waterproofer's standard it also sets requirements for the substrate beneath a membrane, which makes it directly relevant to what the plasterer hands over. The National Construction Code references both and sets out which surfaces in a wet area require what level of protection, with the shower enclosure treated differently from the rest of the room and different again from a laundry. Manufacturers publish their own fixing schedules that sit alongside the standards, including maximum tile weights each product will carry, which matters where large format or stone tiles are planned. Several practical consequences follow. A lining installed outside the manufacturer's fixing schedule may void both their warranty and the membrane warranty above it. A substrate that does not comply is a waterproofing problem as much as a plastering one. And where a quote cannot answer what centres are being used, that is a reasonable thing to press on before work starts. Waterproofing requirements sit at bathroom waterproofing.
What Wet Area Plastering Costs
Supply and fix wet area sheeting at $45 to $95 a square metre covers water resistant plasterboard in most situations. Room size and access move it within the band. Fibre cement at $60 to $120 and tile backer board at $80 to $160 cost more and suit heavier exposure. Shower enclosure walls justify that price difference. Stripping existing lining at $25 to $60 a square metre is separate and depends on what is being removed. Disposal of the old material is part of that figure.
A full bathroom resheet at $1,800 to $5,000 covers a typical room including strip and refix. Laundries and powder rooms run $900 to $2,800. Water damaged wall repair at $600 to $4,000 varies with how far the damage reaches. Waterproofing costs sit at bathroom waterproofing. Framing repair and noggings at $300 to $2,500 is the item most often discovered instead of quoted. Building a contingency into the number is simply realistic.
What to Look Out For
Check the grade markings on the back of sheets during the window before waterproofing. That is the one thing a homeowner can verify personally. Ask what fixing centres are being used and whether noggings are included at sheet edges. Unsupported sheet joints crack tiles further down the track. Raise the intended tile size before sheeting rather than after, since it changes the support required. Large format tiles need genuinely flat walls behind them.
Expect the budget to move at strip out if there is existing water damage. A contingency is realistic and not pessimistic. Do not accept standard plasterboard anywhere in a wet area. Standards come from Standards Australia, the Code from the Australian Building Codes Board and licensing from NSW Fair Trading.
How to Get Useful Quotes
Give the room dimensions and say whether it is a bathroom, ensuite, laundry or powder room. The level of exposure differs between those rooms. Say whether existing lining is being removed or whether this is new construction. Strip and disposal are real costs. Mention any known water damage, staining or soft spots. Those details shape both the scope and the contingency needed.
State the tile size you are planning, because it affects framing and sheeting decisions. Bigger format tiles change the support requirement. Say whether waterproofing and tiling are part of the same engagement or separate. Coordination between those trades matters a great deal. Have each quote name the sheeting grade per location, state fixing centres, confirm noggings, price framing correction separately and give a rate for damage found at strip out. Pin those five down and the quotes become comparable, and disputes have a pathway through NCAT.
Wet Area Waterproofing Across New South Wales
We connect you with waterproofing specialists across New South Wales for wet area leak investigation, membrane repair, threshold and upturn rebuilds, balustrade fixing repairs, concrete cancer works and full strip and remembrane projects, from Sydney metropolitan and the Eastern Suburbs through the Inner West, North Shore, Northern Beaches, Western Sydney, the Hills district and the Sutherland Shire, out to Newcastle, the Hunter, the Central Coast, Wollongong, the Illawarra and regional New South Wales.
▶ Sydney Inner City 18 areas
▶ Greater Sydney 25 areas
Western Sydney
South Western Sydney
Northern Sydney
The Hills District
Inner West
St George
▶ Sydney Coastal 23 areas
Northern Beaches
Eastern Suburbs
Harbour Suburbs
Sutherland Shire
▶ Hunter & Central Coast 19 areas
Central Coast
Hunter Valley
Port Stephens
▶ Illawarra & South Coast 18 areas
Illawarra
Shoalhaven
Sapphire Coast
▶ North Coast 19 areas
Mid North Coast
Coffs Coast
Northern Rivers
▶ Blue Mountains & Highlands 17 areas
Blue Mountains
Southern Highlands
▶ Regional NSW 21 areas
Central West
Riverina
New England
Far West
Wet Area Plastering FAQs - NSW 2026
What does wet area plastering cost in NSW?
Supply and fix water resistant plasterboard runs $45 to $95 per square metre, fibre cement $60 to $120 and tile backer board $80 to $160. Stripping existing lining adds $25 to $60, and a full bathroom resheet lands between $1,800 and $5,000.
Can standard plasterboard be used in a bathroom?
Not in a wet area. Standard sheet has no place there regardless of what goes over it, because the membrane above does not compensate for the sheet below. Grade markings are printed on the back face of every sheet and readable before lining is covered.
Which grade goes where?
Shower enclosure walls generally take fibre cement or tile backer board, other bathroom walls and the ceiling take water resistant plasterboard, and a wet room with no hob needs the higher grades throughout. Different grades in one room is normal rather than a compromise.
What are noggings and do I need them?
Timber supports where sheet edges meet between studs. Without them the joint flexes under load, and that flex cracks tiles and tears membranes. They are inexpensive at framing stage and effectively impossible to add once sheeting is up.
How do I check the work myself?
During the day or two between sheeting going up and the waterproofer arriving, photograph the back face markings on a sheet, look for noggings at sheet edges, check fixing spacing, confirm a gap at the floor and run a level across the wall.
Does tile size affect the plastering?
Yes. Tiles in a large format magnify any deviation in the wall as lipping between tiles, and adhesive cannot correct a wall out of plane. Raise the intended tile size before sheeting, since it changes what the framing and support need to be.
How much water damaged lining should come out?
Well past the last visible sign of damage, since water travels along sheets and down framing further than staining suggests. Anything marginal left in place becomes the weak point in the new wall, and soft sheeting has already lost its integrity.
Why did my new bathroom lining go mouldy?
Usually ventilation rather than waterproofing. Undersized fans, fans ducted into a ceiling cavity rather than outside, and rooms with small or no windows leave vapour in the room, and paper faced lining absorbs it repeatedly until mould follows.
Where does sheeting sit in the renovation sequence?
After demolition, rough in plumbing and electrical, and framing correction, and before waterproofing and tiling. A plasterer arriving before rough in is complete is a scheduling problem worth raising rather than working around.
Who is responsible if the wall moves later?
That is worth settling before work starts, because a plasterer, waterproofer and tiler working separately each have a reasonable account of their own work. A builder coordinating all three, or one contractor holding the whole scope, gives a single point of responsibility.
Wet Area Waterproofing Specialists - NSW
Related NSW Services
For Tradies - NSW
Are you a tradie? Browse current paid job leads on the NSW tradie job leads board, where homeowners across Sydney and regional New South Wales post real projects. Wet area work brings plasterers, waterproofers and tilers onto the same project, so you can explore waterproofer jobs, tiler jobs and builder jobs in NSW, or see the full range of leads posted to The Quote Yard platform.
Wet Area Leaking in New South Wales?
Post your job and connect with NSW specialists for wet area leak investigation, membrane repair, concrete works and full remembrane projects across Sydney and regional NSW.
Get Waterproofing QuotesAbout This Guide
This page provides guidance information only and is not professional advice of any kind. Details may change, always verify with the relevant authorities and seek independent professional advice where needed.
Looking for more services across New South Wales? View all available trade services.
Reviewed by The Quote Yard Editorial Team
How The Quote Yard Works
We connect you with independent local tradies and service providers, we don't perform any trade work ourselves. Tradies provide their own quotes directly to you. Always confirm licensing, insurance, and scope of work before engaging any provider.
All NSW tradies are required to hold appropriate licences. Verify at NSW Fair Trading.
Figures on this page are indicative 2026 NSW estimates only and vary with room size and layout, sheeting grade and thickness selected, framing condition and whether noggings or stud correction are required, the extent of water damage found once the existing lining is removed, access and disposal, and whether waterproofing and tiling follow as part of the same scope. Quotes should always be obtained for your specific property. Building, licensing and consumer protection requirements are set by legislation, the National Construction Code and Australian Standards and are periodically updated, so confirm the current position with the relevant authority and your contractor before relying on any figure.