Originally Posted by MSZ 007
My only issue is that I don't have a good way of supporting my mast with guy wires. It can only be mounted to my facia and the base with a ground mount. The fascia at the edge of my roof is about 9' high so if I have a 20' mast, 11' feet above would be unsupported. I have a concrete tile roof and don't want to mount anything (guy wires, struts, bracing, etc) to it. So ideally I'd like to just get away with a mast that's self supporting or maybe go with a larger diameter pipe.
Hi MSZ 007,
I'll offer some unproven-by-me mast mounting thoughts from my novice mind--although I've been reading lots of other people's posts in the last 3 years. In my case, the home I own now came with a tripod antenna mount on the garage roof. But the time will come when the asphalt shingles will need to be replaced, and it has me thinking that I may want to go with a fascia mount along the peak at the end of the structure. Thus, similar to what I'm perceiving your thoughts to be.
The rule of thumb I've read is that the maximum unsupported mast height (thus, without guy wires) is 10 feet. With a concern then that if one is in a windy area, 10 feet might allow for too much sway in the mast.
This YouTube caught my eye recently:
Two thoughts that the gentleman expressed were:
* He has the mast 3 feet deep in the ground.
* The antenna is within reach when he stands on the roof--he mentions being 7 feet above the peak.
My best guess is that 3 feet in the ground should be the minimum. Seems like 4 feet would match the length some antenna ground rods are made.
With those ideas, I'd revisit your hypothetical that 20 feet of mast would provide you 11 feet of (unsupported) clearance. For that, I'm picturing you weren't going to bury any of the mast in the ground. If instead you go with 20 feet total, consider having 7 feet above the peak of the roof, which will allow you to bury 4 feet below ground level (using your 9 foot roof height mentioned above).
I might be all wet with these thoughts. Perhaps someone with past hands-on experience will share further ideas.
Also, for a fascia mount, this YouTube came up in my search:
I tracked down the business's website to be: https://antennaservicesinc.com/
In the video, the narrator mentions about how their design has the two U-bolts to better stabilize than a single one that could slide some with the mast. That also sounds good to novice me. Not an endorsement of this particular product by any means, just a further thought that has me thinking.
Good luck! ~~ Statmanmi