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Wind Uplift
All roofs are subjected to the effects of wind uplift as the wind moves across them.
The affects of this will depend upon a number of factors, including their location, height, size, roof shape, slope and relationship to the surrounding area. It is therefore critical that a roofing system is designed to withstand the wind loadings that are likely to impact on the roof during its service life. British Standard BS6399: Part 2: 1997 (Incorporating Amendment 1) Code of Practice for Wind Loads, defines the methodology to be used for the calculation of wind loads and their application.
As the manufacturer and designer of the Sarnafil roofing system, there is probably no-one else better qualified to design a project specific Sarnafil roofing system against wind uplift. That is why the Sarnafil Technical Services Department carries out these calculations, using specially developed software designed upon that developed by the BRE. The results of these calculations are included in the Sarnafil specification and provide the Sarnafil Registered Contractor with the information they require for tendering and installing the optimum roofing system. This information is also used by the Sarnafil Field Technician, to check the installation against the original specification for guarantee purposes.
To carry out these calculations, the Technical Service Department requires all of the following information:
- National Grid Reference or postcode
- Greatest height(s) of roof(s)/parapet from ground level
- Eaves detail
- Longest dimension
- Roof pitch
- If mono-pitched, duo-pitched or hipped
- Deck pull out result (when appropriate)
Contact your Local Technical Adviser.
© 2006 Sarnafil Ltd. Legal Disclaimer
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