Roof Drains/Sumps
Designed for membrane compatibility, these drains facilitate fast and efficient water removal from the roof surface.
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Primary roof outlets for collecting and discharging stormwater efficiently.
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Designed for integration with membrane roofs including warm roof systems.
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Tested to meet New Zealand flow rate requirements.
Introduction
Nuralite roof drains and sumps are designed to manage primary stormwater discharge on flat and low-slope roofs. Installed at low points, these outlets collect surface water and direct it into downpipes, ensuring the roof remains free of standing water.
Two-stage drains with domed strainers and clamping rings provide reliable, secure connections to the membrane and prevent debris blockages. Compatible with both warm and conventional roof assemblies, Nuralite roof drains have been used across commercial, industrial, and civic projects for decades. They integrate seamlessly with Nuraply membranes, maintaining continuity and watertight performance around outlets.
Correct positioning and installation are essential for system reliability, and Nuralite provides standard detailing to support specification. For architects and engineers, these drains offer a tested, high-performing option for effective roof drainage.
Considerations
Clogging risk if not maintained: Regular inspection and cleaning are essential. Debris buildup can lead to ponding, overflow, and stress on membrane seams.
Insufficient slope affects performance: Poorly designed falls can prevent water reaching the sump. Roofs must be built with adequate falls (minimum 1:80 constructed) to ensure proper drainage.
Requires overflow provisions: A single sump is not enough for code compliance. Redundancy (secondary overflow outlets or scuppers) is needed to prevent water damage in blockage events.
FAQs
Where is roof sump NZ typically installed on a flat roof?
What are the technical benefits of using roof sump NZ?
Does roof sump NZ comply with NZ building code requirements?
Related Projects
Awatapu College
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Related Webinars
Keeping It Simple (KISS)
Discussing how keeping the design simple can save considerable cost and time, and the principles you can implement to ensure your projects are optimised.
Presented by Shane Clarke (Nuralite), Benedicte Pacorel (Nuralite) and Sian Taylor (Team Green Architects).
Designing Multi-Purpose Roofs
Discussing solutions to common problems such as wind uplift and membrane protection.
Presented by Shane Clarke (Nuralite) and Lewis Olding (Nurajack).