Generated by Yoast SEO v26.2, this is an llms.txt file, meant for consumption by LLMs. The XML sitemap of this website can by found by following [this link](https://www.sansom.co.nz/sitemap_index.xml). # Sansom \- Construction \& Remedial Engineering Specialists, Auckland > Since 1975, Sansom have been providing construction and remedial engineering services with a focus on the waterpoofing of buildings\. ## Pages - [Portfolio](https://www.sansom.co.nz/videos-portfolio/) - [About Us](https://www.sansom.co.nz/about-us/) - [Home](https://www.sansom.co.nz/) - [History Book](https://www.sansom.co.nz/history-book/) - [Contact Us](https://www.sansom.co.nz/contact-us/) ## Posts - [The Concrete Process: How We Test, Choose Material, and Repair](https://www.sansom.co.nz/the-concrete-process-how-we-test-choose-material-and-repair/): Quality assurance is a critical part of any building process, and it is no different when it comes to waterproofing roofs\. If you're developing a building, about 2\-3% of that cost is waterproofing\. Yet 80% of issues with water ingress are due to the roof’s waterproofing\. - [Why Quality Assurance in Roofing Goes Beyond the Legal Minimum](https://www.sansom.co.nz/why-quality-assurance-in-roofing-goes-beyond-the-legal-minimum/): Quality assurance is a critical part of any building process, and it is no different when it comes to waterproofing roofs\. If you're developing a building, about 2\-3% of that cost is waterproofing\. Yet 80% of issues with water ingress are due to the roof’s waterproofing\. - [February Newsletter 2026](https://www.sansom.co.nz/february-newsletter-2026/): As we wrap up 2025 \- our 50th year in business \- we want to thank you for being part of the Sansom journey\. This milestone year has seen us tackle complex waterproofing challenges across a number of significant projects, while navigating the current construction climate\. The good news is that there are positive signs that things are improving, and we're looking forward to 2026 with some new major projects starting\. One area we've been working on for a number of years, and have been seeing more and more projects come through, is warm roofs\. - [Below Ground Waterproofing Standards: A Year of Progress in New Zealand](https://www.sansom.co.nz/below-ground-waterproofing-standards-a-year-of-progress-in-new-zealand/): Modern infrastructure relies heavily on tunnels, yet these essential structures present unique challenges in design, construction, and maintenance\. In New Zealand, tunnel projects face particular complexities due to being built infrequently and with stringent oversight requirements\. From water supply conduits to rail passages, each tunnel serves a specific purpose and demands careful consideration across its entire lifecycle\. - [December Newsletter 2025](https://www.sansom.co.nz/december-newsletter-2025/): As we wrap up 2025 \- our 50th year in business \- we want to thank you for being part of the Sansom journey\. This milestone year has seen us tackle complex waterproofing challenges across a number of significant projects, while navigating the current construction climate\. The good news is that there are positive signs that things are improving, and we're looking forward to 2026 with some new major projects starting\. One area we've been working on for a number of years, and have been seeing more and more projects come through, is warm roofs\. ## Elementor Header \& Footer Builder - [Footer](https://www.sansom.co.nz/elementor-hf/footer/) - [404 template](https://www.sansom.co.nz/elementor-hf/404-template/) ## Services - [Roofing](https://www.sansom.co.nz/service/roofing/): With expertise in both sheet and liquid membranes, Sansom is equipped to deliver diverse roofing needs across modern flat roofs, warm roofs, green roofs, and carpark and balcony membranes\. - [Warm Roofs](https://www.sansom.co.nz/service/warm-roofs/): With expertise in both sheet and liquid membranes, Sansom is equipped to deliver diverse roofing needs across modern flat roofs, warm roofs, green roofs, and carpark and balcony membranes\. - [Tanking](https://www.sansom.co.nz/service/tanking/): Sansom has been the leader in underground waterproofing in New Zealand since the early 1990s and has undertaken the largest and most complex tanking projects in New Zealand\. - [Tunnels](https://www.sansom.co.nz/service/tunnels/): With expertise in both sheet and liquid membranes, Sansom is equipped to deliver diverse roofing needs across modern flat roofs, warm roofs, green roofs, and carpark and balcony membranes\. - [Façade](https://www.sansom.co.nz/service/facade/): Sansom offers specialist façade services designed to provide resilience and longevity to structures, including the installation of precast panels and drained joint systems\. ## Projects - [FAÇADE WATERPROOFING – CARLAW PARK STUDENT VILLAGE PARNELL](https://www.sansom.co.nz/project/facade-waterproofing-carlaw-park-student-village-parnell/) - [MEMBRANE ROOF REPLACEMENT – BAY OF ISLANDS](https://www.sansom.co.nz/project/membrane-roof-replacement-bay-of-islands/) - [BASEMENT NEWTONS WATERPROOFING – GREY LYNN](https://www.sansom.co.nz/project/basement-newtons-waterproofing-grey-lynn/) - [COMPLEX MULTI\-LEVEL RESIDENTIAL WARM ROOFS – REMUERA](https://www.sansom.co.nz/project/complex-multi-level-residential-warm-roofs-remuera/) - [HIGH END RESIDENTIAL WARM ROOFS – HERNE BAY](https://www.sansom.co.nz/project/high-end-residential-warm-roofs-herne-bay/) ## Testimonials - [Roimata Maihi](https://www.sansom.co.nz/testimonial/roimata-maihi/): Fantastic effort by Sansom helping the project out to complete early and handover to following trades\. Appreciate Sansom team at short notice, staying late and putting in the long hours including Saturday and Sunday full days over 3 weeks\. - [Little Bay Ratepayers Association](https://www.sansom.co.nz/testimonial/little-bay/): The LBRA Comitee would like to take this opportunity to thank Sansom Ltd for its diligence and commitment in assisting us to repair the leak on our dam\. - [Concrete Remediation Client](https://www.sansom.co.nz/testimonial/concrete-remediation-client/): "Many thanks to the Sansom team members responsible for the efficiency and professionalism shown in undertaking the concrete remedial works, with the high quality of workmanship also being greatly appreciated by the Church\." - [Roofing Client](https://www.sansom.co.nz/testimonial/facilities-client/): 'Your diligence, attention to detail, very helpful communication, and very pleasant manner make you an amazing person to deal with\. A true gentleman too\.' - [Alain Venuto](https://www.sansom.co.nz/testimonial/naylor-love/): Sansom is a company that has truly exceeded my expectations with their outstanding performance and exceptional workmanship\. ## Categories - [Uncategorized](https://www.sansom.co.nz/category/uncategorized/) ## Types - [Concrete Repairs](https://www.sansom.co.nz/type/concrete-repairs/) - [Auto Guidance Cable installations](https://www.sansom.co.nz/type/auto-guidance-cable-installations/) - [Tunnel maintenance](https://www.sansom.co.nz/type/tunnel-maintenance/) - [Concrete Repairs](https://www.sansom.co.nz/type/concrete-repairs-concrete-repairs-2/) - [Basements remediation](https://www.sansom.co.nz/type/basements-remediation/)