DOES A PREFA ROOF PROTECT AGAINST ELECTROMAGNETIC INTERFERENCE?

Due to the increasing number of mobile phone users, questions about electromagnetic shielding to protect against the emanating radiation are increasingly being asked. As each radio communication is transmitted between sending and receiving devices, the number of transmission masts being erected in populated areas is growing. For this reason, our (roof and façade) products undergo “electromagnetic interference” testing by the University of the Federal Armed Forces in Munich (Electronics department). Our products have been tested for their capacity to provide shielding from electromagnetic interference in a frequency range of 150 MHz to 10 GHz (mobile phone: 900 MHz and 1800 MHz, TV: 175–800 MHz) with horizontal and vertical polarisation.

THE RESULT

PREFA PRODUCT INTERFERENCE IN % OF
PREFA roof tiles and shingles min. shielding. 99.0%
PREFA rhomboid roof tiles min. shielding 99.4%
PREFA Prefalz min. shielding. 99.7%
PREFA sidings min. shielding. 99.8%
PREFA ripple profile min. shielding. 99.9%
PREFA PRODUCT
PREFA roof tiles and shingles
INTERFERENCE IN % OF
min. shielding. 99.0%
PREFA PRODUCT
PREFA rhomboid roof tiles
INTERFERENCE IN % OF
min. shielding 99.4%
PREFA PRODUCT
PREFA Prefalz
INTERFERENCE IN % OF
min. shielding. 99.7%
PREFA PRODUCT
PREFA sidings
INTERFERENCE IN % OF
min. shielding. 99.8%
PREFA PRODUCT
PREFA ripple profile
INTERFERENCE IN % OF
min. shielding. 99.9%

With increasing frequency, shielding provided by PREFA products is getting even better (up to 99.999%)!

Due to the positive properties of aluminium and the absorption of electromagnetic waves, it may be necessary to mount an aerial (e.g. television aerial) on the roof covering rather than in the attic.

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