[TheForge] Update [OT - Asphalt shingle rot? (Lichen)]

[Bruce Freeman]

I'm concerned that a wire strung on the roof would damage the shingles
by vibrations or other motions.  By the time I tied it down enough to
prevent that, I'd have made lots of holes in the roof.

On Wed, Jul 7, 2010 at 10:29 PM, Larry Brown <lp.brown at verizon.net> wrote:
>
>
> I would just string some bare copper electric wire across the roof. Anchor
> wire in a few spots with a nail and some tar
> Larry
>
>
>
> At 02:26 PM 7/7/2010 -0400, you wrote:
>>Well, this is amusing so I thought you might like an update.
>>
>>Before dropping $60+ on copper flashing, I did some more Web-research.
>>  Turns out that those of you who spoke up are apparently right --
>>copper OR zinc cations will kill lichens.
>>
>>So, what's the cheapest source of copper AND zinc metals?  You guessed
>>it -- "copper" pennies.  So now, if you look real close, you'll see
>>pennies scattered on the north-facing side of my roof, mostly near the
>>peak.  I had only about $5 worth of pennies around when I did this, so
>>might go buy another $10 worth for the effort.  I figure with rain and
>>winds, these will tend to wash down the roof, but I'll cross that
>>bridge when I come to it.
>>
>>Meanwhile, I haven't given up on the notion of spraying the roof with
>>copper sulfate, but I've been trying to figure how and how much.
>>Seems to me that if a strip of copper foil across the roof will
>>protect the roof for 30 years or more (so claims that manufacturer),
>>then the concentration of copper needed could NOT be very high.  I
>>haven't actually worked out a number, but it must be vanishingly
>>small.
>>
>>So I envision doing something like putting a half-teaspoon (if that
>>much) copper sulfate, dissolved in water, in a sprayer and spraying
>>the roof with it.  The problem with this is that I do NOT want to
>>inhale the stuff.  So I could use goggles and mask and wait till the
>>wind is right, or I could come up with an alternative way.  I could
>>possibly roll it on like paint, and if I did that I wouldn't even need
>>to cover the whole roof, as it will wash down from the peak to the
>>rest of the roof.
>>
>>Still thinking on it.
>>
>>--
>>Bruce
>>NJ
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-- 
Bruce
NJ