According to the the research arm of the National House Building Council the growing popularity of fitting photo voltaic panels to domestic roofs has triggered a rise in wind-caused failures and rain ingress.

The NHBC Foundation puts the problems down to the UK’s combination of wind and wet weather.

Graham Perrior at the NHBC Foundation said: “Use of renewable energy technology is much advanced across parts of Europe, so there exists a tendency to follow instructions and examples set elsewhere.

“Unfortunately, the UK’s unique weather system requires a specific approach to installation.

“For example, the potential for prolonged periods of rain in conjunction with high winds is something that must be thoroughly considered to ensure satisfactory installation.”

He warned: “Recent government initiatives, such as Feed in Tariffs and the Renewable Heat Incentive, are encouraging consumers to embrace renewable technology.

“However, while there is widespread enthusiasm for these initiatives, there is a gap in knowledge about the best way to install renewable technology on a domestic scale.”

The NHBC is concerned that when the Green Deal comes into force, roof leakage problems will really swell in number.

While solar panel units are regulated by a range of British and European standards that ensure they are fit for purpose, there are currently no standards that regulate the mechanical installation on buildings to ensure they are resistant to wind and rain.

The NHBC Foundation has launched special guidance to help installers avoid leaky roofs.

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