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Roof Installation

Selection of the Mast

When selecting the mast, the positioning of the satellite antenna is of key importance.

It is essential to avoid mounting the antenna too close to the roof surface, especially in regions with heavy snowfall. This is particularly critical when the roof has a shallow pitch.

If a satellite antenna is poorly positioned directly on the roof, just 20 to 30 cm of snow can lead to a complete service outage, as the receiving unit (LNB) may become fully covered with snow.

This issue can easily be prevented by installing the antenna at a height of 50 to 75 cm above the roof surface, thus ensuring the reception electronics are not affected by accumulated snow.

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Wind Load Calculation

The calculation of wind load in accordance with IEC 60728-11 plays a vital role in selecting the appropriate mast and securing it to the roof structure.

It is absolutely essential to ensure that the mast and its mounting system are properly dimensioned to withstand the wind load exerted on the satellite antenna.

If in doubt, have a qualified specialist dealer perform the necessary calculations on-site.

Mounting

In most cases, an antenna mast left over from a previous terrestrial antenna installation is not structurally robust enough to support a satellite antenna.

Under wind load, such masts are prone to bending or even tearing off.

It is also not permissible to mount any type of satellite antenna on a chimney.

Cable Routing

In roof installations, cable routing typically runs from the top, through the inside of the mast. The mast is then sealed at the top or bottom where it penetrates the roof using a special cap. Make sure that the cables form a downward U-shaped loop before entering the roof. This ensures that rainwater drips off at the lowest point of the "U" and cannot enter under the roofing.

Note: Grounding is mandatory
For roof installations of satellite antennas, lightning protection and grounding in accordance with DIN EN 60728-11 is generally mandatory. Be sure to consult your local specialist dealer regarding proper implementation.