Choosing the best waterproofing in Dunedin comes down to who actually installs the membrane, whether the job is a flat roof, a trafficable deck, a tiled shower or a basement that needs tanking. Waterproofing in Dunedin covers torch-on and single ply systems, Butynol, liquid applied roof coatings and below ground tanking on houses, apartment blocks and commercial buildings. Titus Waterproofing works from South Dunedin and Dunedin Roofing Systems from its Caversham showroom, and both run teams dedicated to membrane work.
1Titus Waterproofing
Titus Waterproofing is a Dunedin owned contractor that supplies and installs waterproofing membranes for residential and commercial clients throughout Otago and the rest of New Zealand. Owners Shaun Paul and Murray Morgan bring more than 50 years of combined experience to below ground tanking, deck and flat roof membranes and interior wet areas, on new builds as well as repairs to existing buildings. The company also installs New Zealand made Classic Stone veneer cladding from the same South Dunedin base.
Services
- Waterproof deck and podium membranes
- Flat roof and green roof membranes
- Basement and other below ground waterproofing
- Shower waterproofing and bathroom floors before tiling
- Roof coating systems and concrete floor coatings
Highlights
- The only New Zealand supplier and installer of Ecodur, a plasticised gypsum coating free of volatile organic compounds
- Member of the Waterproofing Membrane Association of New Zealand
- Site Safe member
- Accredited South Island applicator for the ABEP FFR-K1 liquid applied membrane
- Personal guarantee on workmanship in addition to the product warranty
Location & Contact
Name: Titus Waterproofing
Address: 33 Waverley Street, South Dunedin, Dunedin 9012
Phone: 03 466 3076
Website: tituswaterproofing.co.nz
2Dunedin Roofing Systems
Dunedin Roofing Systems, which trades as part of New Zealand Roofing Systems, has been working in the city since 1987 and runs a waterproofing division alongside its metal roofing and maintenance teams. The waterproofing team installs flat roofing, decking, under slab and tanking products and works with building owners, builders, developers, architects and homeowners on system selection. Its double layer torch-on work includes Dunedin’s Dental School, and the Caversham showroom carries the range on display.
Services
- Enviroclad TPO single ply membrane roofing
- Double layer torch-on membrane systems
- DecKing trafficable deck membranes
- Tanking for basements, under slab areas and underground car parks
- Roof maintenance and leak repair through its TALY division
Highlights
- Level 3 Viking applicator, the highest level of training certification Viking offers
- Member of the Roofing Association of New Zealand
- Five year workmanship warranty
- In house quality assurance procedures on top of each supplier’s installation requirements
Location & Contact
Name: Dunedin Roofing Systems
Address: 251 South Road, Caversham, Dunedin
Phone: 03 455 2252
Website: dunedinroofingsystems.co.nz
3Extreme Roofing
Extreme Roofing runs its Otago branch from Kaikorai Valley Road in Kenmure and operates a separate membrane arm, Extreme Membrane, alongside its metal roofing and scaffolding teams. The membrane team covers most areas of waterproofing and flat roofing, from torch-on membranes and peel and stick tanking systems through to wet areas, trafficable membranes and leak detection. It suits owners who want the membrane work and the surrounding roof or cladding handled by one contractor.
Services
- Torch-on membrane roofing
- Peel and stick tanking systems
- Warm roof systems
- Trafficable membranes and wet area waterproofing
- Leak detection and crack injection
Highlights
- Dedicated membrane arm, Extreme Membrane, working separately from the metal roofing team
- Dunedin branch with its own local landline, alongside branches in Cromwell and Invercargill
- Works with Viking, Sealco, Equus, Allco, Ardex, GAF and Sika membrane systems
- Member of the Roofing Association of New Zealand and a Licensed Building Practitioner
Location & Contact
Name: Extreme Roofing
Address: 552 Kaikorai Valley Road, Kenmure, Dunedin 9011
Phone: 03 455 2468
Website: extremeroofing.co.nz
4Roof Restorers Otago
Roof Restorers Otago works from Blackhead Road and installs membrane roofing systems on residential and commercial buildings in Dunedin and the greater Otago region. The membrane side of the business covers Enviroclad TPO, Butynol and silicone based coatings, with the coatings aimed at restoring and protecting an existing roof rather than replacing it. The same team handles gutters, downpipes, flashings and historic slate work, which suits Dunedin’s older housing stock.
Services
- Enviroclad TPO membrane installation
- Butynol membrane roofing
- Silicone based roof coatings
- Membrane roofing for new builds and reroofing projects
- Gutters, downpipes and custom flashings
Highlights
- Membrane roofing installations come with a warranty
- Separate historic slate roof service for older Dunedin buildings
- Free no obligation assessment and quote
Location & Contact
Name: Roof Restorers Otago
Address: 71 Blackhead Road, Dunedin
Phone: 0800 776583
Website: roofrestorers.co.nz
5Robertson Roofing
Robertson Roofing is a Dunedin roofing business whose work runs from Butynol membrane roofing through to Butynol tanking, alongside roof repairs, reroofing and spouting. The tanking service extends past flat roofs and decks to sealing walls and floors inside or out, including steamy bathrooms. The team works across Dunedin and out to Mosgiel, Waitati, Warrington, Balclutha, Palmerston and Middlemarch.
Services
- Butynol membrane for flat roofs and decks
- Butynol tanking for interior walls and floors
- Roof leak repairs
- Reroofing and new roof installation
- Gutter and spouting replacement
Highlights
- Five year watertight guarantee
- Work carried out by a Licensed Building Practitioner
- Covers Dunedin plus Mosgiel, Waitati, Warrington, Balclutha, Palmerston and Middlemarch
Location & Contact
Name: Robertson Roofing
Address: Dunedin
Phone: 027 476 1548
Website: robertsonroofing.co.nz
Waterproofing in Dunedin at a Glance
| Business | Highlight |
|---|---|
| Titus Waterproofing | The only New Zealand supplier and installer of Ecodur |
| Dunedin Roofing Systems | Level 3 Viking applicator, the highest level of training certificatio... |
| Extreme Roofing | Dedicated membrane arm, Extreme Membrane |
| Roof Restorers Otago | Membrane roofing installations come with a warranty |
| Robertson Roofing | Five year watertight guarantee |
How to Choose the Right Waterproofing Contractor in Dunedin
- Match the system to the job. Torch-on and single ply membranes such as Enviroclad TPO suit flat and low slope roofs, DecKing and similar trafficable membranes suit decks people walk on, and bentonite or peel and stick systems are for below ground tanking.
- Ask whether the contractor is an approved applicator for the product being specified. Membrane manufacturers issue product warranties only where an accredited installer has done the work.
- Check that the quote separates the workmanship guarantee from the product warranty, and ask how long each runs.
- For a tiled shower or bathroom floor, ask who is doing the waterproofing layer and what documentation you will get for the building consent.
- Confirm the crew has worked in Dunedin conditions. Cold and wet winters limit which systems can be laid, and torch-on can be installed at low temperatures when liquid systems cannot.
Frequently Asked Questions About Dunedin Waterproofing
How much does waterproofing in Dunedin cost?
Cost depends on the system, the area and how much preparation the substrate needs, so waterproofers price each job after a site visit rather than by a set rate. A small deck membrane and a full commercial torch-on roof sit at opposite ends of the range. Several Dunedin contractors offer a free assessment and quote, which is the quickest way to get a real number.
Do I need a building consent for waterproofing work?
Waterproofing that forms part of a building’s weathertightness, such as a roof membrane, a deck over a habitable space or tanking to a basement, usually falls under the external moisture requirements of the Building Code and needs consent. Straight maintenance and like for like repair often does not. The Ministry of Business, Innovation and Employment building performance site sets out the rules, and Dunedin City Council can confirm what your specific job needs.
How do I check a waterproofer is licensed?
Membrane roofing and weathertightness work on a house is often restricted building work, which must be carried out or supervised by a Licensed Building Practitioner. You can search anyone’s name or company on the public Licensed Building Practitioners register before you sign anything. Membership of the Roofing Association of New Zealand or the Waterproofing Membrane Association is a further sign the business is held to industry standards.
Which suburbs do Dunedin waterproofing companies cover?
Most work across the whole city and the surrounding district rather than a single suburb, so a contractor based in Caversham, Kenmure or South Dunedin will still quote in Mosgiel, St Clair, North East Valley or Port Chalmers. Some also travel to Waitati, Warrington, Balclutha, Palmerston and Middlemarch. If you are outside the city, ask about travel before booking a site visit.
What is the difference between tanking and a roof membrane?
Tanking keeps ground water out of a structure below the soil line, such as a basement, a retaining wall or an underground car park, and it is applied to the outside face of the concrete wherever possible. A roof membrane keeps rain out of a flat or low slope roof above. The materials overlap, but the detailing, the drainage and the failure risks are different, which is why below ground work is usually quoted separately.
How long does a waterproofing membrane last?
Manufacturers of single ply and torch-on systems commonly issue product warranties measured in decades, and Dunedin installers add their own workmanship guarantee on top, often five years. Actual life depends on the detailing at upstands, penetrations and drains, on how much foot traffic the surface takes, and on whether the roof or deck is cleared and inspected periodically.
Can a leaking flat roof be repaired instead of replaced?
Often yes. A localised split or a failed lap can be patched, and a tired but sound roof can sometimes be recoated with a liquid applied or silicone system rather than stripped. A fleeceback membrane can also be laid over an existing one on some roofs, which avoids exposing the structure. A contractor should tell you which of these your roof is a candidate for after inspecting it.
Who waterproofs a tiled shower?
Wet area waterproofing is done before tiling, either by a specialist waterproofer or by a tiler certified to apply the membrane. It is worth asking which of the two is doing it on your job, because the tiling and the membrane are separate warranties. Several waterproofing contractors in Dunedin handle bathroom floors and shower linings as a standard part of their interior work.
How We Chose the Best Waterproofing in Dunedin
Every business in this guide was found by searching for waterproofing in Dunedin, then checked against its own website. Names, addresses and phone numbers are taken from the business’s own site rather than a directory feed, so what you see here is what they publish themselves. We also check that each one is actually based in or genuinely serving Dunedin, rather than a national operator running a local landing page. A business with no website of its own is not listed, because there is no primary source to verify it against.