About Us

Learn more about Gunac | Waterproofing Specialists

Gunac | Waterproofing Specialists is an Access Partners in Property Company. Gunac have over 40 years of waterproofing experience working in both the commercial and residential spheres of the building industry.

As mentioned in topreviews, our teams work on waterproofing projects wherever there is a specified requirement for a guaranteed high-quality waterproofing system. Gunac has become one of the leading Waterproofing Applicators in the region. We work with some New Zealand’s biggest building companies and architects to help them design and specify the correct waterproofing solutions for their projects.

The combination of Access | Partners in Property’s culture and the specialist expertise offered by the Gunac team means that project managers, consultants, architects and the like, will be confident that their buildings are receiving the best waterproofing products and workmanship available.

Our multi-skilled technicians, experienced Contract Managers and Quantity Surveyors have underpinned our growth.

The success of our growth is reflected in our:

  • Established reputation for top-rate communication
  • Excellent response times and;
  • Quality of delivery.

This is demonstrated by the long-term relationships we have fostered with our core clients. Currently, many of NZ’s large corporates trust us with waterproofing their buildings. We count Crowne Plaza, Sky City and many Body Corporates across Auckland amongst our successful project portfolio.

Gunac Auckland Head Office
Gunac torchon Membrane application

Meet the Gunac | Waterproofing Specialists team

Pieter Botha

Pieter Botha

Operations Manager

Starting at Access as a project manager was my opportunity to make a difference in the NZ construction industry. 8 months down the line, not the proverbial fishing line, I moved to facilitate and lead the Gunac Team, and what a dynamic team it is.

When I’m not helping the guys deliver the quality work we provide, I’m out in the beautiful Auckland waters fishing the evenings away.

Silvana Guzzone

Silvana Guzzone

Operations Administrator & Scheduler


Every day is never the same, especially with the Gunac team.

As the Administrator and Scheduler, I am responsible for ensuring jobs are loaded and scheduled and the delivery team have all plant, information and equipment needed to deliver quality work for our clients.


Richard Redmond

Richard Redmond


With over 30 years experience in waterproofing under my belt, I am usually the first on the site from the Gunac team.

My data to day comprises of inspecting a range of properties, from residential houses and complexes to large commercial buildings.  

In my spare time, you will find me cruising and modifying my motorcycle collection. 


Craig Langmore

Craig Langmore

Contracts Manager - Liquid Membrane

I joined Gunac | Waterproofing Specialists in 2020 bringing over 20 years experience and learnings in waterproofing.

Within the team, you will find me project managing several Liquid Membrane Projects and co-ordinating a strong team of over 12 technicians.

Each day brings new challenges however with Gunac, there is no project we cannot tackle.

Kon Kulborisov

Kon Kulborisov

Site Manager - Sheet Membrane

Managing a team of over 20 membrane technicians can be difficult. As Site Manager, I work closely with Luis in delivering quality sheet membrane projects. 

I am an experienced torch-on applicator for several of New Zealand’s best waterproofing systems. This is of advantage to the team as I bring hands-on knowledge to help advise on solutions. 


Talk to our Team today

We can help with a wide variety of waterproofing and roofing services