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Sarnametal G/S
Sarnametal consists of 1.2mm thick Sarnafil G membrane factory, laminated to 0.62mm hot dip galvanised steel with a corrosion resistant finish.
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It ensures that flashing details are finished with a membrane based termination, eliminating
the differential movement problems of traditional flat roofing trim systems. Once a Sarnametal
G/S trim is fabricated and installed, the Sarnafil membrane trim is simply hot air welded to the Sarnametal
trim.
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Detail 1.1
All Sarnametal trims require
pre-drilling of the top flange, with a suitable sized clearance hole at staggered 250mm or 150mm centres,
depending on specification. Trims with a face depth of up to 55mm generally only require face
fixing at the ends of the trim, to a Sarnametal jointing plate with a pop rivet. Trims with face
depths of 56mm to 110mm require additional face fixing at 1m centres, to prevent damage to the trim
after installation. Trims with a face depth greater than 110mm, are generally regarded as fascias
and will therefore require face fixings at 500mm intervals. As an alternative to face fixing,
the trim can be hooked over 1mm galvanised steel cleats, a minimum of 100mm wide at the same centres.
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Detail 2.3
Where it is not possible
to use any other form of termination, a Sarnametal Detail 2.3 flashing can be attached to the upstand
through the flat area of the trim, at 250mm centres. The Sarnafil TG/TS roofing membrane is then
simply hot air welded to the face of the trim, covering the fastening method. The top angled part
of the trim is then sealed with Sarnaplast 2235 mastic, after the application of Sarnafil Primer 110.
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Detail 2.8
Sarnametal formed into
Detail 2.8, is inserted into a chase in the masonry or brickwork and secured in place prior to the use
of mortar or Sarnaplast 2235 mastic to seal the chase. This removes the need for a Lead counterflashing.
The detail should be fixed at 250mm centres.
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The following guidelines provide the nearest colour match to the Sarnametal colour range. It is the specifier’s responsibility to satisfy themselves of the accuracy of the colour match, as Sarnafil cannot guarantee an accurate colour match.
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COLOUR MATCH |
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Light Grey (9525)
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BS 00A05
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Goose Wing Grey
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Lead Grey (9500)
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RAL 7012 Basalt Grey
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Copper Patina (6525)
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Copper Green
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Reseda Green
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RAL 6011
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RAL6011
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Copper Brown
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Copper Brown
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RAL 8004
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RAL 8004
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Cream White
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Cream White
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RAL 9001
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RAL 9001
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Azure Blue
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Azure Blue
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RAL 5009
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RAL 5009
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© 2006 Sarnafil Ltd. Legal Disclaimer
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