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SFT Tube System
With the advent of the revised Building Regulations Part L 2002, the thermal bridging of a rigid steel fastener has to be taken in to consideration and can add in excess of 10mm to the required thickness of the thermal insulation. To eliminate the need for this factor to be calculated, Sarnafil Ltd has introduced the pre-assembled thermally broken SFT tube fastener range.
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SFT tube systems consist of the SFT tube pre-assembled to either an
SBF-SQ3 fastener or a TI-Z10 fastener. The 15mm diameter grey polypropylene SFT tube has an integrated
50mm diameter stress plate, with 4 large barbs that puncture and grip the membrane. This is only
suitable for use in insulated Sarnafast applications.
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SFT fasteners must be installed with a TP10, TP19 or TP30 Installation
tool, depending on the length of the tube, to ensure correct fastener setting and eliminate damage to
the SFT tube. Prior to installation, the Sarnafil S/TS membrane must be pre-punched with a Sarnafil
SMP punch to avoid distortion of the membrane.
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The SBT Row Termination Washer is a 105mm diameter galvanised steel washer, for use with the SBT tube system only. Positioned at the end of intermediate perimeter rows of SFT fasteners or intermediate rows of Sarnabars, the SBT Row Termination Washer is secured with three fasteners per washer and prevents damage to the membrane.
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© 2006 Sarnafil Ltd. Legal Disclaimer
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