Allco Secures CodeMark Certification for Johns Manville TPO Membrane

Allco Secures CodeMark Certification for Johns Manville TPO Membrane

We’re excited to share our Johns Manville (JM) TPO Membrane is now CodeMark Certificate. This achievement represents more than just a compliance tick, it’s a reflection of our unwavering commitment to delivering high-performance waterproofing systems that meet the most rigorous industry standards.

What Codemark means for you

The CodeMark scheme is New Zealand’s highest level of product assurance. Backed by MBIE, this certification provides robust, independently assessed evidence that a building product or system complies with the New Zealand Building Code (NZBC).

CodeMark certification isn’t just about testing a finished product. It encompasses a complete quality assurance framework, from the raw materials used in manufacturing right through to ongoing, independent audits. This ensures continuous alignment with the claims made in the certificate and gives our customers confidence that what’s specified is what’s delivered.

TPO (Thermoplastic Polyolefin) is one of the most widely specified roofing membranes in New Zealand, thanks to its exceptional durability, energy efficiency, and ease of installation. It offers a cost-effective and reliable solution for low-slope and flat roofs, particularly in harsh weather and high UV environments like those commonly found across the country.

Now, with CodeMark certification, our JM TPO membrane is officially recognised as compliant under the core NZBC clauses B2 (Durability), E2 (External Moisture), and F2 (Hazardous Building Materials), alongside an important additional clause: G12 (Water Supplies). This means it is approved for use in applications where harvested rainwater may be used for potable supply, further enhancing its appeal for sustainability-focused projects.

A trusted solution, backed by Allco

With the CodeMark certification now in place, designers, specifiers, and contractors can confidently choose the Johns Manville TPO membrane, knowing it meets all critical compliance requirements for consented projects in New Zealand. Whether you’re working on commercial roofs, green roofs, or complex detailing, the JM TPO membrane stands out as a reliable, proven, and future-focused solution.

At Allco, we’re proud to offer not only industry-leading products but also specialist support and technical expertise. Our comprehensive roofing range includes TPO, bitumen, hot melt, and asphalt membranes, all tailored to suit New Zealand’s diverse climatic and structural conditions. Contact our technical team today for guidance on selecting the right membrane system for your next project.