Existing roof waterproofing solutions

When refurbishing membrane roofs, Allco JM TPO is the best membrane choice. 

The Allco ALLRITE Recover Roof has been designed and engineered to provide long term durability, weather tightness, and improved thermal & acoustic performance for existing roofs. 

Because of the many different possible variations of existing roofs and membrane build ups, we recommend you contact your Allco account manager or email tech@allco.co.nz for advice.

Please refer to our CAD Library for typical membrane details.

Product Manufacturer Description
TPO Membrane 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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Warm Roof system Allco

Made for New Zealand’s climate, this slim, fully adhered warm roof system eliminates thermal bridging and is ideal for low-slope designs with a minimal build-up height. Supports TPO or torch-on membranes.


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Recover Roof system Allco

A re-roofing system using your existing metal roof as the base. Reuses the existing deck to improve watertightness, insulation and compliance. Suitable for occupied buildings needing a cost-effective, low-disruption retrofit.


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Document Type Brand Actions
JM Vapour Barrier Product Sheet
pdf0.19 MB
Technical Datasheet (TDS) Johns Manville Preview Download
JM TPO - Product Datasheet
pdf0.24 MB
Technical Datasheet (TDS) Johns Manville Preview Download
Certificate of Analysis Potable Water
pdf1.01 MB
Technical Datasheet (TDS) Johns Manville Preview Download
Allprep - Technical Data Sheet
pdf0.13 MB
Technical Datasheet (TDS) Johns Manville Preview Download
Allco Alltherm TPO - Compliance Documents
pdf37.46 MB
Product manual Johns Manville Preview Download
Allco Alltherm Casali - Compliance Documents
pdf37.46 MB
Product manual Casali Preview Download

Above-ground applications

From a simple deck to a suspended carpark structure, we provide robust waterproofing solutions for every above-ground application.

Projects

Explore how our waterproofing systems perform across projects around the country.

Approved Applicators

Search our nationwide network of accredited applicators, trained to Allco warranty standards.