Stop leaks before they start. We design and install deck waterproofing systems that protect living spaces, ceilings and framing from water ingress. Our solutions are built to AS 4654 (external above-ground membranes) and the NCC requirements for damp and weatherproofing, then certified at handover for your records and insurer.
Why Brisbane homeowners choose Brisbane Waterproofing Pro
- QBCC-licensed & insured — we issue a Form 43 aspect certificate on completion
- Standards-led: AS 4654 (Parts 1 & 2) and NCC Volume 2 (external waterproofing)
- Whole-system approach: substrate prep → falls & drainage → membrane → terminations → QA
- Trafficable & under-tile options matched to UV, movement and finish
- Photo-documented QA and clear warranty terms
- Coordinated scheduling with your builder/tiler to keep projects on track
What we waterproof on a deck
- Deck surfaces & set-downs — ensure continuous falls to drainage so water doesn’t pond
- Perimeter upturns and skirting/edge details
- Door thresholds & waterstops (stacker/bifold) with compatible trays/flashings or linear threshold drains
- Outlets, overflows and scuppers integrated with the membrane
- Penetrations (posts, balustrade fixings, service pipes) sealed as a system
- Movement joints & substrate transitions detailed for expected movement and UV exposure
Systems we install
- Liquid-applied trafficable membranes for exposed decks
- Under-tile systems (liquid or sheet) for tiled decks/terraces
- Sheet membranes (e.g., TPO/Butyl/EPDM) with protection layers under pavers or decking on pedestals
- Protection boards & drainage cell where required before finishes
Our 7-step deck waterproofing process
- Assessment & fixed quote — substrate, falls, outlets/overflows, door thresholds, edge terminations and finishes reviewed
- Surface preparation — remove contaminants; grind/clean; prime to substrate (concrete, screed, FC sheet, plywood*)
- Falls & drainage — verify/achieve compliant gradients; position outlets/overflows to manage storm events
- Detailing — bond-breakers at corners; terminations, thresholds and penetrations set out per manufacturer and Standard
- Membrane application — sheet or liquid; required overlaps/dry film thickness achieved and recorded
- Curing & QA — respect cure times; optional flood test; photo log for your builder/certifier
- Certification & handover — QBCC Form 43, product data and care guide; warranty activated
* We’ll advise the correct build-up for timber substrates and movement control.
Compliance that protects you
- AS 4654 (external above-ground membranes) governs materials and design/installation for decks, balconies and roof terraces
- NCC Volume 2 Part H2 sets the performance requirements for damp and weatherproofing in housing
- Documentation: Form 43 aspect certificate provided at completion (Building Regulation 2021)
What affects price & timelines
Scope (m² and linear metres of edges/penetrations), substrate condition, fall corrections, outlets/overflow upgrades, and access.
Most decks take 1–3 days on site plus curing time before finishes.
Deck waterproofing FAQs
Do you certify the work?
Yes — we issue a QBCC Form 43 aspect certificate with photo documentation.
What standards do you follow for decks?
External decks/terraces are waterproofed to AS 4654 with detailing aligned to NCC H2.
Can you create a flush (threshold-free) doorway?
Yes. We design threshold details (e.g., linear drains and trays) that manage water while keeping accessibility in mind.
Sheet or liquid membrane — which is better?
It depends on exposure, movement, UV and finish. We specify the system that best suits your deck’s build-up and usage.
Get a quote for your deck today
Ready to waterproof your deck? Get a quote today. Call 0409 424 651 or fill the form below:
Brisbane Waterproofing Pro:
QBCC Licence: [15533739] | Public Liability Insured
Email: admin@brisbanewaterproofingpro.com
Phone: 0409 424 651
Opening Hours: Mon-Sun 6:30am-4:30pm
Location: Victoria Point
