Bathroom Waterproofing
Wet area membranes for new bathrooms, renovations, shower recesses and leak repairs.
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Waterproofing • Sydney, NSW
Waterproofing that
keeps Sydney dry,
season after season.
Professional waterproofing for bathrooms, balconies, rooftops, basements and structural concrete — residential, commercial and new construction projects across Sydney.
- Professional Waterproofing
- Residential & Commercial
- Sydney Waterproofing Services
- Repair & Remedial Waterproofing
- New Construction Waterproofing
What we do
Waterproofing Services
Waterproofing for every part of a building that has to keep water out — internal wet areas, exposed external surfaces and below-ground structures.
Balcony Waterproofing
External membranes for balconies, terraces and decks, including remedial waterproofing.
Learn moreRooftop Waterproofing
Flat and low-pitch roof membrane systems, upstands, parapets and rooftop leak repairs.
Learn moreBasement Waterproofing
Below-ground tanking and remedial waterproofing for basements and water ingress.
Learn moreConcrete Waterproofing
Membranes and sealing for slabs, walls, podiums, planters and structural concrete.
Learn moreLaundry & Wet Area Waterproofing
Membranes for laundries and internal wet areas, new work and remedial repairs.
Learn moreWaterproofing Repairs
Leak investigation, failed membrane repairs and remedial waterproofing.
Learn moreGeneral Waterproofing
An overview of waterproofing services available across Sydney for any project type.
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On site
Membrane work, done properly
Planter boxes, balconies, rooftops, bathrooms and structural concrete — substrates are prepared and primed, junctions and penetrations detailed, then membranes built up to the thickness the area requires.
Google reviews
Reviews from Sydney customers
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Industries
Waterproofing for Every Project
Why Diamond Seal
Waterproofing done properly, from the substrate up
Waterproofing is hidden work. Once tiles, screed, landscaping or backfill go over the top, nobody sees the membrane again — which is exactly why preparation and detailing matter more than anything else. Diamond Seal Waterproofing focuses on the parts of the job that determine whether it lasts.
Professional approach
Clear communication, tidy work and a defined scope from the first conversation.
Waterproofing expertise
Waterproofing is the focus of the business, not an add-on to another trade.
Proper preparation
Substrates cleaned, prepared and primed so membranes bond as they are meant to.
Attention to detail
Junctions, penetrations, falls and terminations are where waterproofing succeeds or fails.
Residential & commercial
Work scaled to a single bathroom or a full commercial waterproofing package.
Repair & remedial solutions
Existing failures diagnosed and remediated, not simply covered over.
The problem
Water Getting Where It Shouldn't?
Water rarely appears where it entered. It tracks through screed beds, slab edges and wall cavities before it shows up as a stain, a smell or a lifting tile. Identifying the entry point is the first step to fixing it.
- Water leaks
- Moisture ingress
- Failed waterproofing membranes
- Bathroom and shower leaks
- Balcony leaks
- Concrete water ingress
- Basement water ingress
- Water damage to finishes
How it works
A straightforward process
- 01
Get in Touch
Contact Diamond Seal to discuss your waterproofing requirements.
- 02
Assess
Understand the area, waterproofing requirements and any existing issues.
- 03
Waterproof
Complete the appropriate waterproofing works for the project.
- 04
Protect
Provide a properly waterproofed surface designed for the project's requirements.
Service area
Waterproofing Services Across Sydney
Diamond Seal Waterproofing works with homeowners, builders, developers, strata managers and commercial property owners throughout Sydney. Whether the project is a single bathroom, a leaking balcony or a larger commercial waterproofing scope, the starting point is the same conversation about the area, the conditions and the outcome you need.
Free quote
Need waterproofing?
Let's keep the water out.
Send through a few details and we'll come back to you with a free quote. If it's urgent, calling is always fastest.
- Free, no-obligation quotes
- Residential and commercial properties
- New work, repairs and remedial waterproofing
Get a Free Waterproofing Quote
Tell us about the area and we'll get back to you.