[TowerTalk] Coax and asphalt shingle roofs

[Bill Winkis (Mindspring)]

Have had three runs of RG-8 type running 125 feet across the roof, for 
43 years and three new asphalt roofs.. Here in South Georgia the roof 
gets so hot you can not stand on it...but the SWR of 1.04 has never 
changed...
Now 43 years ago when they said Mil-Spec..I'm sure it was Mil 
Spec...Today who knows what you REALLY get....
Bill ...KC4PE
http://www.kc4pe.com/amateurshack.htm

On 7/20/2020 5:09 PM, 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 at 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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