Question Antenna height above metal roof

Apr 1, 2019
Should a Yagi (or any) antenna be placed a certain height above a metal roof? Mine would be pointing away from my roof, but located next to it at the end of my house.

Thanks, Rus
The issue with the roof in general maybe that is reflects signals into the antenna no matter what distance. In some ways it might help ? When you consider a dish antenna is big piece of metal that reflects signal into the antenna.

I suspect it make no difference. The signal spread at the end of the antenna is very small. If you wanted to know exactly how many inches I suppose you could try one of the fresnel zone calculators