Substrate assessment and preparation
Checking the floor and wall substrate, removing contaminants, and making sure the surface is sound, clean and ready to accept a membrane.
Bathroom Waterproofing
Bathroom Waterproofing Sydney
Wet area membranes for new bathrooms, renovations, shower recesses and leak repairs.
The bathroom is the most water-loaded room in a home, and the shower is the most heavily loaded part of that room. Diamond Seal Waterproofing applies bathroom waterproofing membranes to floors, walls, hobs, shower recesses and penetrations so that water stays in the areas designed to handle it, rather than migrating into wall cavities, floor structures and adjoining rooms.
Bathroom waterproofing is completely concealed once tiling starts, which makes it very easy to under-do and very expensive to correct. Rectifying failed bathroom waterproofing usually means removing tiles, screed and sometimes wall sheeting. Getting the membrane right the first time is far cheaper than getting it right the second time.
Leaking shower or bathroom?
Most bathroom leaks are not plumbing failures. They are waterproofing failures — water passing through grout and tile, reaching a membrane that is missing, thin, poorly detailed or damaged, then finding its way out somewhere else.
Typical symptoms include a damp patch on the wall outside the bathroom, a stain on the ceiling below, skirting boards that swell and peel, mould that keeps returning at the base of walls, or timber flooring lifting near the bathroom door. If the moisture appears without the tap running upstairs, waterproofing is the first place to look.
What bathroom waterproofing involves
Priming
Applying the correct primer for the substrate so the membrane bonds properly rather than sitting on dust or a sealed surface.
Detailing junctions and penetrations
Bond breakers and reinforcing at floor-to-wall junctions, internal corners, hobs, and around waste outlets, tap penetrations and shower niches.
Membrane application
Applying the waterproofing membrane in coats to the required coverage across floors, shower walls and any other areas specified for the bathroom.
Falls to waste
Confirming the floor drains toward the waste so water is not left ponding on top of the membrane.
Curing and protection
Allowing the membrane to cure and protecting it from damage by following trades before tiling begins.
Common bathroom waterproofing applications
- New bathroom construction
- Full bathroom renovations
- Shower recesses and walk-in showers
- Hobless and step-free shower floors
- Ensuites and powder rooms
- Apartment and strata bathroom waterproofing
- Shower sealing and leak remediation
- Bathroom waterproofing repairs after failure
Benefits
Protects the structure behind the tiles
Keeps water out of wall frames, floor sheeting, slabs and the rooms next door and below.
Reduces mould and damp problems
Persistent mould and musty smells are often the visible result of moisture sitting where it should never reach.
Renovation-ready sequencing
Waterproofing scheduled to fit between screeding and tiling so the renovation keeps moving.
Detail-focused workmanship
Corners, hobs, niches and penetrations receive specific attention because that is where bathrooms leak.
Bathroom waterproofing problems
If any of these sound familiar, it is worth having the area assessed before the damage spreads further.
- Water staining the ceiling below the bathroom
- Damp patches on walls adjoining the shower
- Drummy, loose or lifting tiles
- Mould returning at the base of walls or in the shower
- Rotting skirting boards and swollen door frames
- Membrane never applied to shower walls
- Membrane damaged by trades before tiling
- Inadequate falls leaving water ponding on the floor
Why choose Diamond Seal Waterproofing
- Bathrooms and wet areas are core, everyday work
- Preparation and priming treated as essential, not optional
- Careful detailing at corners, hobs, niches and penetrations
- Works alongside builders, tilers and renovators
- Repair of failed bathroom waterproofing as well as new work
- Straightforward advice on what the bathroom actually needs
Frequently asked questions
Have a question that isn't covered here? Call 0452 528 532 and we'll talk it through.
Related waterproofing services
Need Waterproofing in Sydney?
Talk to Diamond Seal Waterproofing about your residential, commercial or construction waterproofing requirements.