Bathroom Waterproofing in Preston
Certified bathroom waterproofing across Preston. Older edwardian and californian bungalows in the area often have failed or non-compliant membranes hidden under tiles from the 90s. We strip back, reprime, and lay a certified two-coat system that sits behind every renovation we build.
- 1 – 2 daysTypical duration
- From $2,340Price guide
- 6-yearWarranty
- FixedWritten price
What's included in your Preston bathroom waterproofing.
Every line below is written into the fixed-price contract before demolition begins. There are no allowances, no "PC sums" and no vague inclusions.
- Substrate inspection and moisture check
- Primer coat on all wet-area surfaces
- Bond-breaker on internal corners
- Two-coat liquid membrane system
- Falls verified to floor waste
- 72-hour cure before tiling
- Photographic record of every coat
- Signed AS3740-2021 certificate
Certified, insured, warranted.
- AS3740-2021 compliant
- In-house licensed waterproofers (not subcontracted)
- $20M public liability insurance
- Six-year warranty on membrane workmanship
Bathroom Waterproofings we've completed nearby.
Six stages. Three inspections. One accountable team.
Every Vision Line renovation runs the same documented sequence. Nothing is signed off verbally — every stage is photographed, and every certificate is issued to you in writing.
1. Consult & measure
Free on-site inspection. We measure, photograph and diagnose the substrate, plumbing routes and fall issues before quoting.
2. Design & fixed quote
Every tile, tap, vanity and screen specified by product code in a written scope with locked-in start and finish dates.
3. Rough-in & waterproofing
Demolition, plumbing and electrical rough-in with certificates. Substrate correction, screed to 1:80 fall, two-coat AS3740-2021 membrane.
4. Tiling & joinery
Wall and floor tiling, custom joinery, tapware, screen and mirror installation. One project manager on-site daily.
5. Final inspection
Silicone at internal corners, detailed clean, snag list, tap flow tests and final photos.
6. Handover & warranty
Formal handover with warranty pack, care guide, waterproofing certificate and plumbing/electrical Certificates of Compliance.
Three mandatory inspections before you accept the job.
Pre-waterproofing inspection
- Substrate flatness (±3mm over 2m)
- Fall to waste (min 1:80)
- Hob and step-down heights
- Tap and mixer set-out verified
Pre-tiling inspection
- Membrane cured minimum 72 hours
- Adhesion pull test on membrane
- Puddle-flange bond verified
- Set-out lines chalked and photographed
Pre-handover inspection
- Silicone at every internal corner
- Screen alignment within 1mm plumb
- Tap flow rates & mixer temperatures logged
- Snag list closed with client signature
Certified, insured, warranted.
- Registered Domestic Builder (VBA)
- Licensed Victorian plumber & A-Grade electrician on staff
- AS3740-2021 waterproofing certificate on every job
- AS3958.1 tiling installation standard
- $20M public liability insurance
- Six-year workmanship warranty on labour
- Full manufacturer warranty pass-through on all fixtures
Registration numbers, insurance certificates and waterproofing certificates are available on request before you sign a contract.
How your Preston bathroom waterproofing runs.
- Day 1–2 · Site protection, demolition and rubbish removal.
- Day 3–5 · Plumbing and electrical rough-in with certificates issued.
- Day 6–8 · Substrate prep, screed to falls, AS3740 waterproofing.
- Day 9–15 · Tiling, joinery, tapware and shower screen fit-off.
- Final day · Silicone, detailed clean, snag list and handover.
Typical on-site duration for Preston: 1 – 2 days.
Local considerations we plan for.
- Home styles: edwardian and californian bungalows and post-war weatherboards dominate the streetscape — informs substrate choice and layout options.
- Preferred finishes: local requests skew toward fluted stone feature walls and honed travertine.
- Site logistics: Older Preston homes commonly have galvanised or lead-lined supply plumbing that must be replaced in copper or PEX-B during rough-in — we quote this in advance rather than as a variation. Heritage overlays apply on some Preston streets; we check Darebin's HO maps before any external work.
Everything under one contract.
Frequently asked.
Do you cover our part of Preston?
Yes. We service all of Preston (3072) and the surrounding suburbs — Reservoir, Coburg. Free on-site measure across the entire area.
Which bathroom waterproofing style suits Preston homes best?
Given the local mix of edwardian and californian bungalows and post-war weatherboards, we most often recommend fluted stone feature walls, paired with bath removed for luxury walk-in shower. Every recommendation is confirmed against your specific floor plan during the design session.
Do we need to remove tiles for you to waterproof?
Yes — proper waterproofing sits behind the tile bed. Any 'topical' membrane applied over existing tiles is a temporary bandaid, not a compliant fix.
Will insurance accept your certificate?
Yes. Every certificate is issued in the applicator's name with photographic evidence attached, which is what insurers require for future claims.
Ready to book your Preston bathroom waterproofing?
Free on-site inspection, fixed-price quote in writing within seven days, and a written start date.