Sefton Road: Award-Winning Design Meets Reliable Waterproofing
- Nuralite Waterproofing
- 1 day ago
- 2 min read
Location: 38B Sefton Ave, Grey Lynn, Auckland
Architect: Ashton Mitchell
Developer: Family Trust
Builder: Goodwin Constructions
Applicator: Nectar Waterproofing and Applied Coatings
Products Used: Nuraply 3PM membrane and Nurajack Deck Pedestals
The Situation
Sefton House is a compact, architect-designed family home on a steep, tree-lined site in Grey Lynn, Auckland. The home steps down the slope to capture views and sunlight, creating a sense of spaciousness despite its modest footprint. Recognised with a 2025 Te Kāhui Whaihanga Auckland Architecture Award, the project exemplifies thoughtful urban design and craftsmanship. The plywood roof terrace above a habitable room required a waterproofing system that could handle mixed materials, tight junctions, and provide a level deck finish.
“This is a welcoming family home that manages to overcome its steep and constrained context… Plywood wall linings and timber floors make for a warm and glowing interior, offsetting the more recessive and prosaic metal exterior cladding.”— 2025 Te Kāhui Whaihanga Auckland Architecture Awards Jury
The Challenge
The design called for a warm, functional roof terrace which sat directly above the living space. This demanded absolute watertightness and precision detailing. The waterproofing membrane needed to integrate cleanly with metal saddle flashings and complex junctions, while providing a stable surface for the floating deck system. The tight site and architectural detailing left little room for error.
The Solution
A CodeMark-certified Nuraply 3PM two-layer membrane system was selected for its proven performance and versatility. Installed over plywood, it bonds seamlessly to different materials, including timber and metal, forming clean, durable junctions without the need for extra components. Above the membrane, self-levelling Nurajack pedestals support the floating timber deck. This creates a flat, accessible surface without compromising the waterproof layer below.
The result is a simple, robust solution that complements the home’s architectural precision, protects the space beneath, and provides lasting peace of mind for the owners.
21 October 2025
