Allco appointed official New Zealand distributor for PREPRUFE® and BITUTHENE®

Allco is pleased to announce that we are now the official New Zealand distributor for PREPRUFE® and BITUTHENE®, two of the most recognised and trusted below-ground systems in the market. 

Smarter Warm Roof Design Starts with ALLTHERM

ALLTHERM Warm Roof brings together thermal performance, drainage design, and buildability in one intelligent system. With fully customised tapered insulation layouts, designed and pre-cut to achieve accurate falls, projects benefit from faster installation while reducing material waste by up to 40-50%

Understanding Type A and Type B Waterproofing — and Why It Matters

Below-ground waterproofing is one of the most critical elements of a building’s long-term performance. That’s why understanding strategies - particularly Type A and Type B protection - is increasingly important for designers, engineers, and builders across New Zealand.

A complete below-ground system: Allco adds new type A and type B waterproofing solutions

We’re excited to share two major developments that strengthen our below-ground waterproofing offer: the addition of two well-known membranes in New Zealand—Bituthene® and Preprufe® from GCP. We’re also expanding into a new product category with Centrament Proof 10 (CP 10) from MC-Bauchemie, our first concrete admixture solution.

A Milestone Year for Allco

2025 marks a major milestone — Allco turns 50!

From a small Kiwi business to a nationally trusted name in waterproofing, it’s been a journey built on quality, innovation, and strong relationships. We’re proud to look back on how far we’ve come and even more excited about what’s ahead.

Allco Keeps Growing – with new & returning team members!

While the market may be slowing down for some, we’re charging full steam ahead. As we celebrate our 50th year of waterproofing excellence, we’re continuing to grow our talented team to better support our customers and key stakeholders.

We’re thrilled to welcome Anna Goodall to the team and to welcome back Shane Kilpatrick, who has rejoined the Allco family after a short time away.

Decades of Proven Performance – Now CodeMark Certified

High-performing range and a long-standing commitment to performance and compliance for specifiers, contractors, and building owners.

Casali Membranes Now CodeMark Certified!

Allco’s Casali Dermabit/Dermafil and Aderix membrane systems are now CodeMark certified, adding another layer of assurance, compliance, and confidence to your next roofing or decking project. From torch-on to self-adhesive solutions, our systems are engineered to perform.

Celebrating 5 Years with BOINZ and 50 Years in Waterproofing

It’s been five years since Allco Waterproofing first partnered with BOINZ, and what a journey it has been. As proud supporters of building officials across Aotearoa, we were excited to be back at this year’s BOINZ Symposium and even more so as this year Allco completes 50 year serving the New Zealand construction industry.

Allco Secures CodeMark Certification for Johns Manville TPO Membrane

We’re excited to share our Johns Manville (JM) TPO Membrane is now CodeMark Certificate. This achievement represents more than just a compliance tick, it’s a reflection of our unwavering commitment to delivering high-performance waterproofing systems that meet the most rigorous industry standards.

Welcoming Our New Architectural Consultants

We’re excited to announce the newest additions to our growing Allco family - Charlotte and Jaenè, who join us as Architectural Consultants for the South Island and Waikato & Bay of Plenty, respectively.

Auckland Library's green roof - 3 years on

Allco is proud to have contributed to the success of the Auckland Central Library’s living roof, an ambitious project now delivering tangible environmental benefits after 3 years of monitoring by Auckland Council and Living Roofs Aotearoa. 

Casali Aderix Peel & Stick double layer solution

When it comes to waterproofing roofs, decks, and flat surfaces, durability, safety, and efficiency are essential. Allco’s Casali Aderix Peel & Stick double layer solution offers a practical and reliable system designed to meet these demands.

Rainwater harvesting done right on Waiheke Island

A luxurious 5-level home on Waiheke Island was constructed into a steep bank, requiring a specialized waterproofing solution for a 45m², 1.6 m-high water tank located beneath the garage floor. This water tank was critical for rainwater collection a vital resource for the Waiheke community, which depends on harvested rainwater for daily needs.

Progress Worth Celebrating

At Allco, we believe in making a difference where it matters most. That’s why we’re thrilled to share the ongoing success of our partnership with Rotorua Lakes High School, now entering its third year. This sponsorship continues to have a transformative impact on the school’s neurodiverse students, and we’re proud to play a role in their journey.

Is your tanking solution holding you back?

When it comes to tanking, the design, planning, and selection of the right membrane are crucial to ensuring the long-term success of any construction project. Mistakes can lead to costly rework, water ingress, and potentially long-term structural damage.

Waterproofing terraces and balconies

Terraced housing and apartments have become increasingly popular due to current housing market trends and challenges. Terraced housing decks and apartment balconies provide residents with a crucial connection to outdoor spaces, allowing them to enjoy views and surroundings.  

Waterproofing vs damp proofing - what's the difference?

When it comes to below ground protection, selecting the right solution is crucial to ensure the longevity and integrity of the structure.

Introducing: Casali DPM Range of Below Ground Membranes

We are excited to announce we have extended our below-ground solution and are now offering a full range of high-quality bitumen damp-proof membranes. Our Casali Damp Proof range is BRANZ Appraised to meet stringent building standards and to provide unparalleled quality and performance, protecting the integrity of below ground structures in low risk project conditions.

New product: Shield Mastic Asphalt

We are excited to announce the expansion of our product range with the introduction of Shield Mastic Asphalt, now available in New Zealand. As a leading manufacturer of waterproofing systems in the UK, Shield Membranes has built a reputation for excellence and innovation. 

Changing Perceptions: Mastic Asphalt, what you should know

Like many long-lasting, tried and tested materials, mastic asphalt is being re-imagined, modified and re-examined as a highly relevant building solution for today. 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. 

Leadership news!

Casali Carpark Membrane

Casali Carpark Membrane has been trusted for over 40 years across 30+ countries for waterproofing carpark decks. The durable and hard-wearing membrane combines polymer bitumen with a tough polyester mesh, ensuring resistance to mechanical and thermal stresses.   

Allco is Carbon Conscious Certified

We’re proud to share we are now Carbon Conscious Certified Business, dedicated to continuously evaluate our operations for potential improvements. We recognise our role as a leading supplier in the New Zealand construction industry and we understand the importance of acknowledging and minimising our environmental impact.

Collecting Drinking Water from Roofs in 5 Steps

In New Zealand, approximately 10% of the population relies on rainwater collected from roofs for their daily water needs. There are also an increasing number of projects looking for sustainable and cost-effective solutions to harvest rainwater as a reliable source for drinking water.

Allco JM TPO certified membrane for water collection

We are pleased to announce Allco JM TPO is now certified as a suitable waterproofing membrane for water collection.

Sharing Allco Values with the Community

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.

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?

When it comes to tanking, there is only one chance to do it right. Designing, planning, and selecting the right membrane is key to guarantee the success of the project.

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

In light of the recent surge in intense rain events, which were once considered rare but are now becoming more frequent, it has become imperative to address the design considerations for below-ground structures. This article explores the need for improved water control measures, in non-hydrostatic conditions, and emphasizes the importance of proactive approaches to mitigate potential damage. By adopting a forward-thinking mindset and implementing robust backfill systems, we can prevent the compromising of tanking systems and ensure effective water management.

Tanking in wet conditions

As we enter winter and the wet season (or should we say,  live in a constant one) a reminder about tanking in wet conditions seems timely. Weather conditions can play a significant part in and can delay construction and have a lasting effect if the membrane selected requires special or unrealistic conditions during installation.

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.

New Zealand is undergoing land densification due to increasing demand for both household and commercial needs.

Basements and partially in-grade structures are becoming the norm to cater to the maximisation of land use. Basement designs are specialised and require Specific Engineering Design (SED) as there are no Acceptable Solutions in compliance with the New Zealand Building Code. There are also no available New Zealand Standards for the design of underground structures.

In the absence of New Zealand Standards for underground structures, communication and collaboration among the architect, structural engineer, and waterproofing supplier is key to a successful project. Communication among all parties must commence from the very earliest stages of the planning.

Allco's joining the Teulo Tribe!

Allco is really excited to announce we are now partnering with Teulo. Teulo is an independent CPD provider for architects, designers and construction professionals where users can select, watch and earn CPD points in an easy and convenient format. Joining Teulo will allow us the opportunity to expand our CPD offering beyond our local community across the industry.

Top 10 Questions about Allco Tanking Membranes.

Bentonite is essentially a high swelling clay mineral whose name was derived from the location of the first commercial deposits mined at Fort Benton, Wyoming U.S.A. This is the source of Volclay sodium bentonite. Bentonite is the active ingredient in our CETCO Volclay (VOLcanic CLAY) range of waterproofing solutions including Voltex, Swelltite, Waterstop-RX.

Auckland Library and the Growth of Green Roofs

What started as a standard refurbishment and repair, evolved into a unique opportunity to create a living green roof with over two thousand low maintenance native New Zealand plants installed so far and with a further 300 to 400 plants being planted over the coming months to improve the overall coverage.

Green Roof Benefits Far Exceed Sustainability

Green roof installations have shown a proven return on investment beyond the environmental benefits. Building owners, architects and city planners are turning to sustainable construction for more than just a carbon footprint reduction.

GETTING YOUR TANKING WATERPROOFING RIGHT, THE FIRST TIME

When designing below-ground waterproofing (also referred to as tanking), a crucial but often forgotten consideration is the water control system after construction is complete. Depending on where the water table is located, hydrostatic conditions may be present, and the conditions/pressure needs to be detailed with great attention to prevent future water ingress.

Belowground Waterproofing and Producer Statement Certificate

A Producer Statement or PS is a formal certification that indicates the building work, design or specifications provided meets the technical requirements set by the New Zealand Building Code or conditions of a building consent.

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.

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

As a supplier of materials used for waterproofing and preventing leaks, Allco is also typically involved in the investigation and remediation of leak problems. This experience has given Allco an understanding of the most common causes of leaks and how leakage problems can be minimised or avoided altogether. Below are the top five issues that are most often the main causes of leaks

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.  Due to the location of the building, there was a high concentration of contaminants, high water table and saline water a specialised waterproofing membrane was required not only to handle hydrostatic pressure but also to act as a vapour barrier protecting indoor air from potential ingress of hydrocarbon vapours.

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

The winner of ‘Best Heritage Building’ in the 2019 Property Industry Awards.