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Re: [TowerTalk] Coax and asphalt shingle roofs

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Coax and asphalt shingle roofs
From: Grant Saviers <grants2@pacbell.net>
Date: Mon, 20 Jul 2020 17:03:52 -0700
List-post: <mailto:towertalk@contesting.com>
The sheath insulation matters a lot as standard PVC will get brittle and break up in a couple of years. Check specs for UV resistance.

I had white marine grade RG8 laying on a metal barn roof in CA for about 6 years and it yellowed a bit but otherwise sweeps fine.

Grant KZ1W


On 7/20/2020 14:09, Gedas wrote:
I do not have any experience with coax directly on my roof but I would still be concerned about possible side effects of extreme temperatures.

Let's say you live some place where the air temp can reach 110F.....given that and a pure sunny day and "darkish colored shingles" and I suspect the surface temperatures on that roof can hit every bit of 150F (or more).....I just don't know if I would like that.

Gedas, W8BYA EN70JT

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

On 7/20/2020 1:51 PM, john@kk9a.com wrote:
I have never seen an issue with coax laying directly on a shingle roof.

John KK9A

Bill Ogden W2WO wrote:

This is my month for questions. I am looking at placing a receiving loop
(and a rotator) on my roof. The roof has architectural asphalt shingles.
What is a reasonable way to get coax and a rotator control cable to the
loop?  In my case, I cannot access the roof point from inside the house.
How should I protect the cables from the rough shingles? And protect the
shingles from being rubbed by the cables? If the answer is conduit, should
it simply lay on the shingles or be raised somehow?

Bill
W2WO

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