NCC Version:
NCC 2019 Volume Two – Amendment 1.
Area of NCC Requirements:
Part 2.2 Damp and Weatherproofing, specifically addressing Performance Requirement P2.2.2 for weatherproofing of roofs and external walls.
Problem:
The proposed circular skylight is not considered a Deemed-to-Satisfy (DtS) roof covering under the NCC. Without a recognised DtS pathway, its installation posed a potential risk of water ingress and non-compliance with weatherproofing standards.
Solution:
A Performance Solution was developed using a CodeMark-certified ATLITE skylight system. The installation includes detailed flashing in accordance with AS/NZS 2904 and AS 2047, along with proper drainage and insulation to prevent water penetration and condensation. The system was assessed using expert judgement and manufacturer specifications.
Finalised Report:
The report concludes that the proposed skylight installation satisfies the performance requirements of P2.2.2. Evidence of suitability, supported by a CodeMark certificate and compliance with relevant standards, confirms that the skylight provides effective weatherproofing and meets NCC compliance.