ARE PREFA ROOFS SUITABLE AS LIGHTNING PROTECTION?
The standard ÖVE/ÖNORM EN 62305-3, which applies in Austria, serves as the basis for this regulation. Country-specific standards and regulations must therefore be taken into account.
Metal roofs are defined as a ‘natural’ part of the lightning protection system according to the standard ÖVE/ÖNORM EN 62305-3. PREFA flat band roof panels (Prefalz and Falzonal) are therefore permitted as a natural part of the arrester and PREFA small format components (roof tiles, shingle, roof panels, roof rhomboid panels) as natural conductors in the lightning protection system (installation of an additional arrester and connection to the earth).
Caution: A few exceptions are defined in the standard, e.g. buildings at risk of explosion (ammunition dumps, mills, etc.), buildings that house a large number of people (schools, nurseries, etc.), transmitters, nuclear power plants, museums, etc.
The suitability of PREFA products as a natural part of the lightning protection system is therefore related to the building in question and should be assessed according to the applicable standards.
For information about the need for and design of the lightning protection system on a particular building, please consult a lightning protection system engineer or approved electrician who is authorised not only to perform the installation but also the legally prescribed acceptance of the lightning protection system. Ask the relevant municipal authority about any additional local regulations.