Membrane roofing

Specify robust, code-compliant membrane roofing. Our flat roof waterproofing options include bitumen, TPO, hot melt and asphalt membranes, suited to New Zealand’s diverse conditions. Contact our technical team for help selecting the right membrane for your project.

Bitumen Membranes

by Casali

A versatile range of bitumen membranes for roofs and decks, available in APP, SBS and APAO formulations. From flat roofs to trafficable decks, choose from torch-on or flame-free systems.

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Hot melt monolithic membrane

by Hydrotech

A self-healing, hot-applied, monolithic membrane ideal for zero-fall, green roofs, and podiums. This thick, flexible and solvent-free membrane system protects against water tracking.

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Mastic asphalt

by Shield

Laid hot and solidified to form a smooth, seamless surface, this tough, robust, impermeable waterproof layer requires minimal maintenance. 100% recyclable, it is suitable for flat roofs, decks, podiums, and high‑traffic carpark applications.

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TPO Membrane

by Johns Manville

A reinforced single-ply membrane offering superior UV resistance, weldability and long-term durability. Known for its flexibility and strength, it is ideal for low-slope roofs, decks, green roofs and water-collection systems.

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TPO Details & Install Guide

Our TPO Details & Install Guide was designed as a reference and onsite consultation tool. It includes our standard TPO details, drawings, technical information, and step-by-step installation guidance with supporting images. If you would like to request a copy, please email info@allco.co.nz

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