Johns Manville is widely recognised as one of the world's foremost suppliers of single ply roofing membrane, Allco has selected the JM TPO for their Cold Roof solution due to its superior UV and Ozone resistance and its impressive environmental credentials. It is a lightweight and cost effective solution that lends itself to most flat roof applications including commercial and residential projects. With warranties from 15-25 years.
Wide and long rolls —JM comes in 3m x 30m rolls
Highest thickness-over-scrim in the roofing industry. TPO attribute for top performance
Exceptional ozone resistance. The JM TPO formulation was developed to maximise resistance to ozone degradation
Seam strength 50% higher over a wide temperature range.
Highly engineered for tear strength and uplift resistance. JM TPO is strong and flexible, helped by the scrim orientation and thickness of our polyester reinforcement.
Thickness tolerances have over 50% less deviation than other major brands. JM measured 10' wide sheets from other brands at 105 data points across the width of the membranes.
Outstanding climate resistance as measured by the Xenon Weatherometer. The ASTM test minimum standard is simulated exposure at 10,080 kJ/m2 . JM has maintained performance now to 19,800 kJ/m2 and continues to accumulate exposure well past the ASTM requirements.
Up to and including Extra High as defined by NZS-3604:2011.
Where specifically designed up to (ULS) 3.0kPa.
In all climate zones as defined by NZS-3604:2011.
Suitable for the following buildings:
On new buildings that have been designed and constructed to comply with the NZ Building Code (NZBC), particularly B1 (structure) as it relates to the construction of the substrate and substrate framing and E2.3.1 (surface water run off) as it relates to the shedding of water.
On existing buildings where the designer and applicator have ascertained that the existing building is suitable for the intended building work.
On the following substrates that incorporate a slope between 1.150 (1:50) 2.30 - 1.150 (1:25), or gutters at with a 0.5° (1:100) fall:
H3.2, CCA treated structural plywood
In situ reinforced concrete
Pre-fabricated concrete panels
Extra High Wind Zone
Statement of Building Code Compliance
In the opinion of BRANZ, JM TPO Membrane, if designed, used, installed and maintained in accordance with the statements and conditions of the Appraisal, will meet the following provisions of the NZBC:
Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years. JM TPO Membrane meet this requirement. See Paragraph 10.1.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.6. Roofs incorporating JM TPO Membrane meet these requirements. See Appraisal paragraphs 13.1 – 13.4
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. JM TPO Membrane meet this requirement and will not present a health hazard to people