PS1 (Design)
Producer Statement –
A PS1 is a formal statement confirming that, at the time of signing, the author is satisfied—on reasonable grounds—that compliance with the New Zealand Building Code will be achieved if the design is followed as specified.
Qualified Waterproofing Designers
At Newton, we are industry-leading waterproofing designers with internationally recognized certifications:
CSSW – Certified Surveyor in Structural Waterproofing
WDS – Waterproofing Design Specialist
With our Professional Indemnity Insurance (PI) coverage for waterproofing design, we offer a bespoke Waterproofing Design Service, providing full liability as the designated waterproofing designer in compliance with the NZ Building Code.
A ‘Golden Thread’ of Waterproofing Expertise
Newton’s Waterproofing Design Partnership connects clients, specifiers, suppliers, and contractors, ensuring seamless project execution and compliance. Our expertise extends from design to post-installation maintenance, supported by a network of specialist contractors and on-site quality assurance services when required.
Professional Indemnity Insurance – Your Assurance of Quality
In today’s market, obtaining Professional Indemnity Insurance for weathertightness and waterproofing design has become increasingly difficult for specifiers and contractors. Newton Waterproofing Systems, with over 170 years of industry experience, remains committed to supporting the industry with comprehensive waterproofing design services backed by robust insurance coverage.
Compliance with the NZ Building Code & BS 8102:2022
The Building Act 2004 sets out the framework for construction, requiring all building consent applications to demonstrate compliance with the New Zealand Building Code. As part of our design service, we provide:
✔ Product and system specifications
✔ Comprehensive documentation proving compliance
✔ Ongoing site inspections and quality assurance
Waterproofing in New Zealand is a specialised task, It is therefore extremely important that the correct design is considered and provided for below ground waterproofing.
With the absence of a dedicated code or standard supporting below ground waterproofing design in New Zealand, it makes a reliance on overseas standards a necessity.
BS 8102:2022 – Code of Practice for Protection of Below Ground Structures Against Water Ingress, highlights the importance of early-stage waterproofing design integration in construction projects, it provides recommendations and guidance on methods of dealing with and preventing the entry of water from external sources into structures that are partly or wholly below ground.
The Importance of Specialist Waterproofing Design
Successful waterproofing demands specialist expertise. Common causes of failure include:
Poor workmanship
Incorrect product selection
Compromised specifications due to budget constraints
Misuse of accredited products that are unsuitable for the project
Ensuring Long-Term Success in Waterproofing
With basement spaces becoming increasingly valuable, it is crucial to implement the right combination of materials, expertise, and planning from the outset. Our mission is to provide manufacturers, specifiers, and end clients with complete confidence in their waterproofing solutions—ensuring projects are completed correctly the first time, every time.