I want to put a satellite dish plus motor on a tenement chimney, but unfortunately one south-west corner of the chimney is already in use for someone else's dish, and the other south-east corner is above the sloping part of the roof so is not accessible (except by the use of scaffolding).
The chimney stack is wide (common to about 16 flats) and measures 3.4 metres east-west by 1 metre in the north-south direction by maybe 1.5 metres high excluding the chimneys. Part of it is above the flat section of roof.
My understanding is that the best way to attach a dish is by the use of a corner bracket plua a steel clamping cable around a chimney stack, but that seems difficult to arrange in this location.
TV aerials are sometimes bolted to the side of a chimney stack, but presumably for a dish that might be a poor idea if as often happens we get 100 mph winds.
Are there alternative fixing methods which are unlikely to damage chimney stacks in high winds?