Shower and wet area waterproofing in Albury
How shower and wet area waterproofing works in Albury: leak signs, membrane types, NSW licence classes, AS 3740, curing, testing and sourced costs.
Waterproofing is the membrane that sits under the tiles in a shower, bathroom or laundry and stops water reaching the framing, the floor or the room next door. Tiles and grout are not waterproof on their own. If a shower in Albury is leaking, the fix nearly always means taking the tiles up, replacing the membrane and retiling. Albury Tilers is a referral website: a licensed independent provider looks at the leak, quotes and does the repair.
Signs a shower membrane has failed
- Paint bubbling or skirting boards swelling on the wall behind or beside the shower.
- Carpet or floorboards that stay damp in the hallway outside the bathroom.
- Tiles near the shower screen that sound drummy or have started to crack.
- Grout that crumbles and turns dark along the bottom row, however often it is cleaned.
- A musty smell that comes back after the room has been aired.
- Stains on the ceiling below an upstairs ensuite.
A plumbing leak in the wall can look the same. A careful provider will ask whether a plumber has pressure tested the pipes, so you do not pay to strip a shower when the problem is a cracked fitting.
Why does a shower leak?
The usual causes are a membrane that was never applied to the full height or width required, a missing bond breaker so the membrane tore when the house moved, a waste that was not sealed to the membrane with a puddle flange, or tiles laid before the membrane had cured. In older homes the original membrane may simply have reached the end of its life. Regrouting and resealing hides the symptom for a while; it does not stop water that is already getting past the tiles.
Membrane options compared
| Membrane type | How it goes on | Things to know |
|---|---|---|
| Liquid applied, water based | Brushed or rolled in coats with reinforcing fabric at joints | Common in houses, needs the full cure time between coats and before tiling |
| Liquid applied, polyurethane | Rolled or trowelled | Tough and flexible, stronger fumes, needs good ventilation |
| Sheet membrane | Bonded to the substrate in sheets with sealed laps | Even thickness, laps and corners need care |
| Preformed shower base or tray | Set into the floor with the membrane lapped onto it | Fewer joints, limits the size and shape of the shower |
Whichever product is used, the provider should follow the manufacturer’s data sheet for coat thickness and drying time, and be able to tell you which product went in.
What the provider will check
- Whether the substrate is sound, dry and suitable for a membrane.
- The floor falls, so water reaches the waste without ponding.
- The waste position and whether a puddle flange is fitted.
- Hob or step-down details, and where the shower screen will sit.
- What is behind the old sheeting, and whether it needs testing before it is cut. The NSW asbestos guidance shows an example of wet-area asbestos cement sheet.
How the work is done
- Strip the tiles and bedding back to the substrate.
- Repair or replace damaged sheeting and set new floor falls.
- Fit the puddle flange to the waste, and any water stop angle at the shower entry or door.
- Prime, then fit bond breakers or flexible sealant at internal corners and floor to wall joints.
- Apply the membrane in the coats the product requires, turning it up the walls.
- Leave it to cure, and inspect it before tiling. Some providers also flood test the floor.
- Tile, grout and finish the movement joints with sealant, not grout.
Rushing step six is the most common shortcut. Ask the provider how long the chosen product needs and plan the bathroom downtime around it.
What does waterproofing cost?
A national guide prices waterproofing of wet areas at $35 to $80 per sqm, with removal of existing tiles at $20 to $55 per sqm and floor preparation at $15 to $50 per sqm where the falls need rebuilding (What’s The Damage, tiling cost guide). Retiling is extra. The bathroom tiling page and the Albury tiling cost guide show the tiling side of the bill.
Which rules apply?
In NSW, waterproofing is its own licence class, described as any protective treatment of a home to stop water or moisture getting in. Jobs priced above 5,000 dollars, counting labour, materials and GST, need a contractor licence (NSW Government, waterproofing work). The wall and floor tiling class also covers waterproofing wet areas to prepare them for tiling. Either way, ask which class the provider holds.
Wet areas must meet the NCC, and AS 3740 is the Australian Standard for waterproofing domestic wet areas. Where the work is part of a job with a construction certificate or complying development certificate, the certifier will usually want a waterproofing certificate. Greater Hume Council, which covers Jindera, publishes its own waterproofing compliance form for that purpose.
NSW lists waterproofing as an example of a major defect, so it carries the 6 year statutory warranty period rather than 2 years. Keep the invoice, the product name and any certificate.
What a careful provider refuses to do
- Seal over a leaking shower with clear coatings and call it fixed.
- Tile the same day the membrane goes on.
- Skip the puddle flange or bond breakers to save time.
- Give a waterproofing certificate for work they did not do.
The Albury angle
Some Albury bathrooms sit on concrete slabs and some on timber floors. Timber floors move more as the seasons change, and the city swings from summer days above 35 degrees to frosty winter mornings, according to Bureau of Meteorology averages for Albury Airport. A membrane laid on timber needs flexible detailing at every joint.
What to do next
Note where the water shows up, how long it has been happening and whether the pipes have been tested. Then ask for a waterproofing quote and an independent provider can confirm whether the membrane has failed. If you are in Victoria, our Wodonga page covers the different registration rules there.
Frequently asked questions
- Can a leaking shower be fixed without removing the tiles?
Products sold to seal grout and tile surfaces can slow a minor leak, but they do not repair a membrane underneath. If water is already reaching the wall cavity or the next room, expect the shower area to be stripped and redone.
- How long does a membrane need before tiling?
It depends on the product, the number of coats and the weather. Water based membranes usually need longer in cold, damp conditions such as an Albury winter. The manufacturer's data sheet sets the time, and the provider should follow it.
- What is a flood test?
The shower floor is plugged and filled with a shallow layer of water for a period after the membrane cures, then checked for leaks before any tiles go down. Not every job includes one, so ask if you want it.
- Do I get a certificate for the waterproofing?
Ask for one. Where the work is part of an approved build, the certifier or council usually requires it. For any job, a note of the product used, the areas treated and who applied it is useful if you sell or have a problem later.
- Who is liable if the new membrane fails?
The provider who did the work. In NSW waterproofing is treated as a major element, so the longer statutory warranty period applies. Raise any leak with the provider in writing as soon as you notice it.