The approval by the building authorities of FischerTHERM sandwich panels does not permit the attachment of such special loads to the steel surface layers.

Necessary roof structures, such as antenna masts, must therefore be planned in such a way that the occurring loads are transferred directly into the substructure.

The antenna mast is connected to the roof substructure, the opening must then be closed from underneath with flat sheet and foamed with PUR foam for thermal insulation and airtightness.
 
From above, the mast is sealed to the roof outer shell by means of a rubber sleeve (e.g. Ejot Flash).
 
Netphen, January 2004