Allco offers a full range of waterproofing and damp-proofing membranes, and understanding their differences before specification is critical.

Introducing: Casali DPM Range of Below Ground Membranes

We have extended our below ground solution and are now offer a range of high-quality damp proof membranes. Our Casali Bitumen range stand out for their superior performance and versatility in low-risk situations.


The adequate waterproofing of terraces and balconies is critical to prevent future leaks and water traveling inside the building causing significant structural damage. 

New product: Shield Mastic Asphalt, now available in New Zealand

We are excited to announce the expansion of our product range with the introduction of Shield Mastic Asphalt, now available in New Zealand.

Changing Perceptions: Mastic Asphalt, what you should know

Mastic asphalt is a versatile construction material used primarily for paving and roofing. Its unique properties make it an ideal choice for a wide range of applications.


We’re absolutely thrilled to introduce our new Managing Director, Tony Broome. With his extensive experience and proven track record in business leadership, we’re confident that Tony’s arrival will further strengthen our team and drive Allco toward even greater success.

Casali Carpark Membrane

Casali carpark membrane is the ideal product for asphalt and concrete overlaid carparks. The exceptional waterproofing protection of the Casali membrane prevents water ingress into the premises below.

Allco is Carbon Conscious Certified

Allco is a Carbon Conscious Certified Business dedicated to minimising our environmental impact. We have reviewed and calculated our business’s CO2 footprint and are implementing strategies for effective carbon reductions.

Collecting Drinking Water from Roofs in 5 Steps

In NZ, approximately 10% of the population relies on rainwater collection for their daily needs. Allco JM TPO is certified as a suitable waterproofing membrane for water collection.

Allco JM TPO certified membrane for water collection

Allco’s JM TPO has undergone rigorous testing and is proven to meet the New Zealand requirements (AS/NZS 4020:2018) as a suitable membrane for the collection of potable water.

Sharing Allco’s Values with the Community

Allco Waterproofing is working in partnership with Rotorua Lakes High School to create better outcomes for students with learning difficulties. The partnership is funding a designated Teacher Aide for Year 9 and 10 students.

TA Team: Technical Knowledge and Site Support

Established in 2007, Allco’s Technical Advisory department had one clear goal: to support and guide our approved applicators and to ensure the correct installation of our Volclay range. At that time, no other suppliers offered a similar service, and we believe this remains a unique point of difference.

Rose joins the Allco Team!

The Allco team continues to grow and we’re excited to introduce our new South Island Architectural Advisor, Rose Ross. She will be based in Christchurch, working closely with S.I. Sales Manager Damien, to continue our growth and expansion in region.

The Resilience of Allco tanking membranes under extreme weather conditions

During the extreme weather events of early 2023, our tanking membranes were really put to the test. A lot of construction sites around the country were negatively affected by the intense rain events wreaking havoc on already tight schedules and causing large delays, not to mention the increased cost due to the loss of product and time to replace.

How much is your tanking really costing you?

Allco Volclay Waterproofing range is a great alternative to torch-on membranes. Unlike torch-on, the Volclay range can be installed in most weather conditions and is a lot quicker to install. Volclay membranes can be applied to damp substrates – there is no need to wait 28 days for the concrete to cure – saving the project precious time and money.

Intense rain events, project design and water control post-construction

The changing climate patterns require a revaluation of water control practices in construction projects. By prioritising effective water management from the design phase through to post-construction, we can mitigate the impact of intense rain events and prevent potential damage. Implementing improved backfilling techniques, utilizing larger (or more) drain coils positioned well below finish floor level, larger volume of backfill and performing regular maintenance are crucial steps toward a more resilient and sustainable approach to water control.

Tanking in wet conditions

One of the greatest benefits of the Allco Volclay range of sodium bentonite products is that it can be installed in virtually any weather conditions – including rain and snow! Volclay products can also be applied to damp substrates – there is no need to wait 28 days for the concrete to cure – saving projects precious time and money.

The Ladies Are Taking Over!

We are very excited to introduce not just one, but three great new additions to the Allco team.

How to Avoid Weeping Walls on Your Next Project

Preventing groundwater finding its way into your basement structure starts at the planning and designing stages of the project. Here is what you need to know to avoid this hard to fix problem.

Allco’s joining the Teulo Tribe!

Allco is really excited to announce we are now partnering with Teulo. Teulo is an independent CPD provider allowing us the opportunity to expand our CPD training beyond our local community across the industry.

Top 10 Questions about Allco Tanking Membranes.

Bentonite is the active ingredient in our CETCO Volclay (VOLcanic CLAY) range of waterproofing solutions including Voltex, Swelltite, and Waterstop-RX.

The TA Team is Growing!

Our TA team growing, and we’re excited to announce not just one, but two new team members.
Meet Bran Dacijar our new TA Team Leader and Matt De Coek our new Technical Advisor and warehouse support.

Auckland Library and the Growth of Green Roofs

The Auckland Library is one of the largest green roof’s in New Zealand utalising Allco’s Hydrotech Green Roofing System.

Philippe Guerra joins the Allco Team!

The Allco team keeps growing! We’re pleased to introduce our new Senior Account Manager Philippe Guerra. Philippe brings with him a wealth of experience in sales, managing large key accounts, and delivering outstanding growth across the many industries he has been involved with in the past.

Green Roof Benefits Far Exceed Sustainability

Here are seven reasons why a green roof should feature on new construction projects.


When designing below-ground waterproofing, a crucial but often forgotten consideration is the water control system after construction is complete. Designing, planning and selecting the right membrane is key.

Welcoming Caitlin to the team!

Caitlin has been with Allco for a few years now as our part time admin support person while completing her university graduation. She now branching out into new areas of the business, supporting our marketing team initiatives while helping the admin team when needed.

Meet Jim Boon, our new Product Specialist!

With 27 years of experience in underground construction, concrete repairs and technology as well as product management and technical advisory Jim brings a wealth of knowledge to our technical team.

Welcome Damien Cook, Allco’s new South Island Sales Manager!

Damien brings a strong 25 years’ experience in the construction industry ranging from sales, business development, architectural specification and project management. He is a great asset and will be instrumental in our growth and South Island expansion.

Belowground Waterproofing and Producer Statement Certificate

Producer statements are signed by a recognised specialist (usually an engineer or architect) working within their scope of expertise. Below ground waterproofing specified projects are often asked by Building Consent Authorities (BCA’s) to have a PS1 submitted as part of a consent package

Testing water for waterproofing

While some may view the water test as an inconvenience, it provides site-specific information crucial for the selection of the most suitable waterproofing membrane for the project. This is especially important in “brownfield” or “saline” sites where existing soil and/or groundwater contaminants are present.

Meet Jason Bland our new TA Advisor!

We’re pleased to officially introduce our new TA Advisor Jason Bland. With 27 years under his belt, Jason brings with him a huge amount of experience having worked as an installer, trainer, and foreman.


We’re pleased to welcome Shane Kilpatrick as our new Bay of Plenty account manager. Shane joins the Allco team bringing with him a solid 14 years of experience in sales and management.

CETCO Volclay – FAQ

We’ve put together some of the most commonly asked questions about our CETCO Volclay range and accessories.

Leaks: Five Reasons Why They Occur and How to Prevent Them

Leaks: The top 5 most common causes, how they can be minimised or avoided altogether. Leaks are avoidable if proper preventative measures are taken, however, if water ingress becomes present, although not ideal, in many cases, these situations can be repairable.

Allco’s New National Sales Manager!

We’re excited to introduce Kamil Krzyzynski, Allco’s new National Sales Manager who has started with us with recently. Kamil brings with him a wealth of experience having worked for 20 years in sales and sales management roles in various industries including engineering and construction.

Merry Christmas and Holiday Hours!

Warehouse – Close 3.30 pm Wednesday 23 December – Reopen Tuesday 5 January 2021
Office – Close on 3.30 pm Wednesday 23 December – Reopen Monday 11 January 2021

Sansom Construction Buys New Hydrotech Kettle

We’re excited to announce Sansom Construction is the proud new owner of a Hydrotech MM6125 kettle.

Welcome to the team Jatin Sharma!

Jatin joins Allco as our Assistant Product Specialist adding a much needed hand to our esteemed Product Specialist Chris Ross. Jatin brings a broad depth of knowledge in AutoCAD and Revit, bolstered by a BSC majoring in Biology.
Part of Jatin induction/training involved some practical product knowledge working on site with the team of Elephant NZ installing our Volclay range and getting a full TPO training earning him the title of qualified TPO installer.

Wynyard Quarter Gets First Application of Coreflex in NZ

Coreflex was chosen as the best option for tanking the WQIP Building developments in Wynyard Quarter providing superior waterproofing protection unmatched by other products.

Welcome to the team Shairmila Navaratnam!

We’re pleased to announce the appointment of Shairmila Navaratnam as Allco’s Senior Account Manager.
Shairmila’s extensive experience combined with her strong technical knowledge and a solid background of architectural advising for waterproofing allowed her to hit the ground running, making her an important addition to the Allco team.

PMR: Offering Flexibility & Efficiency

Allco Waterproofing Solutions provided a durable and energy efficient solution for the Auckland ASB North Wharf building, in the form of a Protected Membrane Roof.

Transform Rooftops into Vibrant Gardens with Allco

As the demand for locally grown produce and high density houses increases, urban communities are becoming more and more creative in finding ways to meet that demand. Urban agriculture can be as simple as windowsill herb gardens or as vast and vibrant as large community gardens that encompass entire city blocks.

From Heritage Church to Architecturally Designed Early Learning Centre

Allco assisted in the design stages and supplied JM TPO roofs; extending over the semi-circular Green Roofing system under which cars would be parked and a second roof which children would play in a variety of spaces including sandpits, green spaces and a water-feature.

CodeMark Certified Zero Degree Fall Waterproofing

The Hydrotech Monolithic Membrane has been entrusted with keeping high profile structures across the country and around the globe watertight for over 50 years. This high-performance waterproofing system now comes with the added assurance of a CodeMark certificate.