Home > Smart Edge - REF
SMART EDGE - R.E.FTM has been created following the discovery of numerous failures with roofing underlays in New Zealand during building investigations involving "leaky buildings".
The roofing underlays or roofing paper from investigated buildings have not been providing adequate relief for the egress of the moisture build-up from the roof condensation. Observation included not only product deterioration, but also construction method failure with the paper or membrane being installed incorrectly.
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1. Each 2.8m length of SMART EDGE - R.E.FTM is held firmly against the front face of the previous installed fascia and fixed in place with a galvanised clout into the purlin or truss. Fixings should be as high as possible on the flashing. |
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2. The double sided tape should have the front face removed by 130mm to allow the next length of SMART EDGE - R.E.FTM installed and lapped by 100mm |
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3. The fascia alignment flange must also be removed for 100mm. This is easily done carefully with a sharp blade. |
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Repeat this process around the entire perimeter |
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Jointing |
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4. Each lapped joint should have a strip of 48mm PVC adhesive tape laid over it. This should extend from the 3mm up turn at the top of the flashing down to the fascia alignment flange.
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Jointing Hips |
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5. This should be done in a similar way except the SMART EDGE - R.E.FTM needs to be mitred and does not overlap itself. The PVC jointing tape should be applied as previously noted. | |
Roofing Paper or Membrane Installation |
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6. The 3M adhesive tape protective strip should be completely removed during the installation of the roofing paper or membrane and the membrane paper firmly pressed onto it.
7. Any excess paper should be CAREFULLY cut off at the front edge of the SMART EDGE - R.E.FTM so as not to cause damage. (If damage occurs, a section of the flashing must be replaced) 8. The roofing iron or tiles can then be installed as per the manufacturer's instructions, and then guttering as per specifications. |
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Building Regulations
(New Zealand Building Code - NZBC)
SMART EDGE - R.E.FTM (Roof Edge Flashing) meets the following requirements. (with the exception of the LRV)
NZS E2AS1 Third Edition 2011 4.3.1 Acceptable Flashing Materials, Table 20 Upvc Durability 50 years (sheltered) and 8.4.11a Flashing requirements (Figure 45a)
Clause B2.3.1c Durability Performance
Clause F2 Hazardous Building Materials: F2.3.1 Smart Edge - R.E.FTM meet this requirement and will not present a health hazard to people.
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