About us-2The Siphonic Roof Drainage Association (SRDA) was set up in 2004 to promote a wider understanding of the principles of siphonic drainage,to encourage best practice by suppliers and installers and to provide a recognised platform for specifiers. Members are subject to an independent third-party technical audit every three years, comprising a site inspection and a check of design compliance with BS8490.

Members must comply with thepdf SRDA Constitution and Minimum Standards

  • UK-registered company.
  • Independently accredited software for drainage design to BS8490.
  • Independently accredited siphonic outlet.
  • All pipework and clamping systems to be in compliance with SRDA standards.
  • Registered installers working to British Standard and SRDA-approved methods.

By using a member of the SRDA, a specifier can have confidence that the company has the tools and experience to do the job properly. If you cannot specify SRDA, then its rules can be used to set a standard.

SRDA offers a wide range of support:

HookerJ-webcomp"I am an independent roofing consultant with over twenty-five years' experience in membrane roofing. I want to achieve the widest possible dissemination of SRDA best practice guidance and to ensure that clients realise the real benefits of these systems for their businesses."

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