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Lightning protection for or hospitals. However, coordination between roofers /
installers of lightning protection systems and installers
roof-mounted systems of photovoltaic systems / electricians is essential not only
when constructing a new building, but also when retrofit-
ting roof-mounted systems.

Feasible: Risk analysis with the DEHN Risk Tool
Integrated: System planning and lightning protection A risk analysis according to IEC/EN 62305-2 shows whether
an external lightning protection system must be installed.
Professional planning is indispensable for safe and reliable To this end, the use of the building and the associated risks
operation of PV systems. It must be coordinated with the are analysed. A risk analysis can be easily performed by
relevant project and include lightning and surge protection means of the DEHNsupport Toolbox including the DEHN
measures. Risk Tool. This globally proven software ensures a techni-
cally and economically sound lightning protection concept.
Installers of PV and lightning protection systems consider
the roof area under different aspects. While installers of
lightning protection systems want to maintain the separa-
tion distance for the lightning protection system, the aim of
PV system installers is to optimise the use of space on the
roof. Lack of communication and coordination may lead to
yield and safety problems. State building codes or insu-
rance companies require that a lightning protection system
is installed. State building codes call for lightning protection
systems in public buildings such as kindergardens, schools

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