Service
Below Ground Tanking
Below ground tanking is a waterproofing system designed to prevent water ingress into structures that sit below ground level - permanently protecting basements, foundations, retaining walls, and below-ground service areas.
Below Ground Tanking
Below ground tanking is a waterproofing system designed to prevent water ingress into structures that sit below ground level - permanently protecting basements, foundations, retaining walls, and below-ground service areas.
Our Systems & Expertise
We work with trusted, industry-proven systems including:
- Sikaproof membrane systems
- Bentonite sheet membranes
These sheet membrane systems create a continuous barrier against groundwater and hydrostatic pressure. Our team understands the critical detailing required around joints, penetrations, construction seams, and service entries - all points where failures commonly occur if not installed correctly.
Where Below Ground Tanking Is Used
- Basements
- Retaining walls
- Foundations and footings
- Lift pits
- Tunnels
- Below-ground service areas
Why Specialist Installation Matters
Because these systems become permanently enclosed once installed, engaging an approved applicator is essential to ensure compliance, durability, and performance. Gunac brings 40+ years of waterproofing expertise and a thorough understanding of soil conditions, water tables, and structural design requirements.
Proudly servicing Auckland, Waikato, and Bay of Plenty.
Approved product partners
Backed by the suppliers we install.
Access is an approved applicator for the leading waterproofing systems on the New Zealand market. The systems we install carry manufacturer-backed warranties.
Service enquiry
Request Waterproofing Support
Tell us what you are managing and Access will route the enquiry.
Urgent? 0800 866 466