Prevent Water Damage in Your Building Before It Starts
Auckland’s high rainfall, clay-heavy soils, and sloped land make below-ground structures especially vulnerable to moisture ingress. Without proper waterproofing, water can push through retaining walls, basement walls, and blockwork foundations — leading to leaks, mould, dampness, and long-term structural deterioration.
Waterproofing creates a protective barrier that works alongside your drainage system to stop moisture from entering your structure. It’s essential for retaining walls, underground rooms, habitable basements, and any part of a property built against soil. Proper waterproofing prevents internal damage, reduces repair costs, and ensures your building remains dry and stable year-round.
AH Drainage combines over 53 years of drainage experience with specialist waterproofing expertise to deliver systems that work with Auckland’s challenging conditions. Using tools such as thermal imaging and targeted leak detection, we locate problem areas accurately and design waterproofing solutions that protect your property from the outside in — with long-term warranties on both workmanship and materials.
Waterproofing Solutions for Every Project
We install and remediate waterproofing systems for residential, commercial, and public infrastructure projects, including:
Retaining walls and foundations
Stop seepage and preserve structural integrity
Basements and cellars
Prevent dampness and internal water ingress
Subdivisions and public works
Waterproofing for civil structures and service trenches
New builds and renovations
Integrated systems during construction
Remediation and leak detection
Locate failures and restore performance with targeted repairs
Integrated Waterproofing & Drainage Expertise
With Senior Certifying Drainlayer Allen Harriman overseeing all work, AH Drainage combines proven waterproofing methods with deep underground water management knowledge. This ensures every solution works seamlessly with surrounding drainage — not against it.
Leak detection with thermal imaging and specialist assessment
Integration of waterproofing and drainage for maximum long-term performance
High-grade membranes and products with warranties on both materials and workmanship
Systems designed for residential, commercial, and civil environments s
Fully compliant installations, including coordination with Auckland Council, Watercare, architects, and engineers
Efficient handling of documentation, inspections, and sign-offs
Protect Your Property with Certified Waterproofing
Talk to AH Drainage about waterproofing for retaining walls, basements, or below-ground structures. We deliver durable, compliant systems designed for Auckland’s unique soil and weather conditions — backed by long-term warranties and specialist expertise.
Frequently Asked Questions
Why is waterproofing important if I already have good drainage?
Even effective drainage can’t stop moisture from seeping into below-ground walls. Waterproofing provides a physical barrier against leaks and dampness.
What areas benefit most from waterproofing?
Any below-ground or retaining structure exposed to constant moisture — such as basements, foundations, and retaining walls — should be waterproofed.
Can you waterproof existing structures?
Yes. We provide both new installations and remediation for older or damaged waterproofing systems.
What materials do you use for waterproofing?
We use industry-approved waterproofing membranes and coatings designed for longevity and compatibility with New Zealand conditions.
Do you coordinate with builders or engineers?
Absolutely. We work closely with builders, architects, and engineers to integrate waterproofing into overall project design and compliance documentation.