Choosing the best waterproofing in Blenheim comes down to who is certified for the system your building actually needs, whether that is below ground tanking, a membrane roof or deck, or the wet area of a bathroom. The contractors below apply membranes to Marlborough homes, wineries and commercial buildings, sealing basements, flat roofs, balconies and showers so water stays outside the structure. Construction Coatings and Profile Roofing Marlborough lead a small field of approved applicators working across Blenheim and the wider region.
1Construction Coatings Limited
Construction Coatings is a Marlborough and Nelson based painting and specialist coatings company with an office on Seymour Street in Blenheim and a yard at the Burleigh Industrial Estate. Its waterproofing arm is a licensed Allnex applicator working with fabric and liquid membrane systems for foundations, basements, flat roofs and internal gutters. The team suits new builds and remedial work across domestic, commercial and civil projects, including large scale tanking such as the cellar and roof garden at Wither Hills Winery.
Services
- Fabric and liquid membrane waterproofing for foundations and basements
- Below ground tanking for cellars, retaining walls and buried structures
- Torch down membrane roofing and flat roof waterproofing
- Araldite injection systems for extensive crack repair
- Epoxy and polyester resin flooring
Highlights
- Licensed Allnex applicator, experienced with Soprema, Bituthene and Elastodeck products as well as the Equus range
- Tanked roughly 800 square metres of cellar and 1,000 square metres of first floor at Wither Hills Winery in Blenheim
- Specialist coatings team with over 20 years in the technical coatings industry
- Tradespeople trained through the BCITO apprenticeship programme
- Full Site Safe compliance across every project
Location & Contact
Name: Construction Coatings Limited
Address: 89 Seymour Street, Blenheim 7201
Phone: 03 579 4774
Website: constructioncoatingsltd.co.nz
2Profile Roofing Marlborough Ltd
Profile Roofing Marlborough is a family owned roofing company based on Timandra Place in Blenheim, formed after the family bought Bainbridge Building and Roofing and dropped the building side to concentrate on roofing. Membrane waterproofing sits alongside longrun roofing and cladding in its service list, and the company is the only Marlborough based approved applicator for Viking Roofspec membranes. It suits homeowners with a flat roof or deck to seal, and commercial clients needing a warm roof system.
Services
- Membrane waterproofing for flat roofs and decks
- Warm roof systems
- New longrun Colorsteel roofing and reroofing
- Metal wall cladding and architectural profiles
- Spouting, downpipes and commercial roof maintenance
Highlights
- The only Marlborough based approved applicator for Viking Roofspec membrane products
- Locally owned and operated, with the directors carrying close to twenty years in the roofing sector
- Member of the Roofing Association of New Zealand
- Sitewise certified and Site App Pro members, with documented safety monitoring
Location & Contact
Name: Profile Roofing Marlborough Ltd
Address: 16a Timandra Place, Blenheim 7201
Phone: 03 579 3500
Website: profileroofingmarlborough.com
3Marlborough Plastering
Marlborough Plastering is an exterior plastering and building maintenance business run by director Mike Douglas, covering Blenheim, Renwick, Picton, Havelock, the Marlborough Sounds and Kaikoura. Alongside its Rockcote plaster cladding work the company is a certified applicator of the Equus Dexx membrane system, used on flat roofs, decks, planter boxes, wet areas and below ground building. It is a sensible first call for anyone with a plastered home where weathertightness and waterproofing overlap.
Services
- Equus Dexx membrane waterproofing for decks, flat roofs and planter boxes
- Below ground waterproofing and sealing systems
- Exterior plaster and cladding systems, including AAC panel and polystyrene
- Weatherproofing, crack repairs and repaints
- High and low pressure water blasting
Highlights
- Mike Douglas is a Licensed Building Practitioner for external plastering and for waterproofing systems on flat roofs and decking areas
- Certified applicator of the Equus Dexx membrane waterproofing system
- More than 25 years in the exterior plastering trade, with work on Shakespeare’s Wharf in Picton and the Otira Viaduct
- The only certified applicator in Marlborough of the Italian Eco Style lime based plaster system
- Quotes for remedial work on cracked plaster cladding from earthquake and other insurance claims
Location & Contact
Name: Marlborough Plastering
Address: Blenheim
Phone: 021 572 800
Website: marlboroughplastering.co.nz
4Specialised Waterproofing Ltd
Specialised Waterproofing is a membrane application specialist established in 2011 and based in Nelson, servicing Nelson, Marlborough and the West Coast. Owner Martin Bennett has been in membrane roofing full time since 1994 and takes a horses for courses approach, matching the membrane to the site rather than defaulting to one product. The small team handles residential and commercial work, from a single walk out deck to industrial tanking under hydrostatic pressure.
Services
- Butyl rubber membrane for walk out decks and commercial gutters
- TPO membrane with heat welded joints for large roof areas
- Torch on modified bitumen roofing and tanking
- Peel and stick and torch on below ground tanking
- Liquid membrane recoating to extend the life of older butynol roofs
Highlights
- Over thirty years of membrane application experience within the team
- Martin Bennett trained and qualified in the United Kingdom through the City and Guilds apprenticeship scheme
- Established in 2011 and covering Marlborough as well as Nelson and the West Coast
- Advises on material selection where hydrostatic pressure rules out peel and stick systems
Location & Contact
Name: Specialised Waterproofing Ltd
Address: Nelson
Phone: 021 185 4798
Website: specialisedwaterproofing.co.nz
5Blenheim Bathroom Renovations
Blenheim Bathroom Renovations is Mike Nurse, formerly trading as Mike Nurse Tiling and Building, who has been renovating bathrooms in Blenheim for twenty years. Waterproofing here is wet area work carried out as part of a full bathroom renovation rather than a standalone membrane service, with Mike doing the building, waterproofing and tiling himself. That makes him the option to call when a leaking shower or a tired bathroom needs the whole job done by one pair of hands.
Services
- Wet area waterproofing within bathroom renovations
- Tiling and under tile heating
- Carpentry including floor levelling, shower base construction and cubicle installation
- Gib stopping, plastering and painting
Highlights
- Twenty years renovating bathrooms in Blenheim
- Carries out most trades personally, so no project manager fee is added to the job
- Works with the same local plumber and electrician on every bathroom
- Takes on wider renovation and alteration work beyond bathrooms
Location & Contact
Name: Blenheim Bathroom Renovations
Address: Blenheim
Phone: 027 464 5362
Website: blenheimbathroomrenovations.co.nz
Waterproofing in Blenheim at a Glance
| Business | Based in | Highlight |
|---|---|---|
| Construction Coatings Limited | Blenheim | Licensed Allnex applicator |
| Profile Roofing Marlborough Ltd | Blenheim | The only Marlborough based approved applicator for Viking Roofspec me... |
| Marlborough Plastering | Blenheim | Mike Douglas is a Licensed Building Practitioner for external plaster... |
| Specialised Waterproofing Ltd | Nelson | Over thirty years of membrane application experience within the team |
| Blenheim Bathroom Renovations | Blenheim | Twenty years renovating bathrooms in Blenheim |
How to Choose the Right Waterproofing Contractor in Blenheim
- Match the trade to the job: tanking a basement, sealing a membrane deck and waterproofing a shower are three different specialities, and few contractors do all three.
- Ask which systems the contractor is an approved or certified applicator for, because most membrane warranties are only valid when the manufacturer has signed off the installer.
- Check the Licensed Building Practitioner register if the work is restricted building work affecting weathertightness, such as a membrane roof or deck.
- Get the substrate and detailing discussed up front, since most membrane failures start at junctions, penetrations and upstands rather than in the middle of a sheet.
- Favour a contractor with a local address and a landline for remedial work, so warranty callbacks and leak investigations do not depend on someone travelling from out of the region.
Frequently Asked Questions About Blenheim Waterproofing
What does waterproofing actually cover?
It covers any system that keeps water out of a building. In practice that means below ground tanking on foundations, basements and retaining walls, membrane systems on flat roofs, decks and balconies, and wet area waterproofing under the tiles in showers, bathrooms and laundries.
Is waterproofing a bathroom a legal requirement in New Zealand?
Yes. Clause E3 of the New Zealand Building Code requires wet areas such as showers, baths and laundry floors to be waterproofed, and the work must be completed and inspected before tiling covers it. More detail on the Building Code is published by Building Performance.
Do I need a Licensed Building Practitioner for waterproofing?
For restricted building work that affects a building’s weathertightness, including membrane roofs and decks on a house, the work must be carried out or supervised by a Licensed Building Practitioner. You can check whether a contractor holds the relevant licence classes on the Licensed Building Practitioners register.
Which membrane is best for a deck I want to walk on?
Butyl rubber is trafficable, so it can be walked on directly and is a common choice for a walk out deck. TPO and torch on membranes are not trafficable and need a floating timber deck or tiles on pedestals over the top, so the decision affects the finished height and the cost of the whole deck.
Do I need a building consent for waterproofing work?
Repairs and maintenance to an existing membrane are often exempt, but a new deck membrane, a reroof or tanking on a new structure usually forms part of a consented job. Marlborough District Council administers consents for Blenheim and the wider region, so confirm the scope with them before work starts.
How long does a waterproof membrane last?
It depends on the system, the detailing and the amount of sun and foot traffic the surface takes. Contractors in the region also recoat older butynol roofs with a liquid membrane, which can extend the life of an existing roof without stripping it back and relaying a new one.
Why does tanking cost more on some sites than others?
Material choice drives it. A 1.6 millimetre peel and stick membrane is far quicker to apply than a 4 millimetre torch on system, so labour costs rise with the heavier product. Sites at risk of hydrostatic pressure need the torch on option, while a straightforward wall may perform perfectly well with the cheaper system on the same warranty.
Can a waterproofing contractor find an existing leak?
Several of the contractors above take on remedial and maintenance work, which usually starts with an inspection of the roof, deck or wall to trace where water is entering. Leaks commonly track a long way from the entry point, so an inspection before any repair is quoted saves paying to reseal the wrong area.
How We Chose the Best Waterproofing in Blenheim
Every business in this guide was found by searching for waterproofing in Blenheim, 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 Blenheim, 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.