[Cob] Coblist Digest, Vol 13, Issue 6

[Erica [Ritter] Wisner]

The rain catching idea sounds very similar to what they do at Cob Cottage
Company in Coquille, OR, as part of the finish to their living roof
systems.  Let's see if I have a partial picture...
None of my pictures are showing it very well.  Maybe Google has some...
Here, their gallery has a lot of pictures.  The "Dawn and Dusk" cottage is
done with the entire eave wrapped this way.  It's either 3" or 4" black
drain pipe.
http://www.cobcottage.com/sites/www.cobcottage.com/files/styles/gallery_main/public/images/Cob18.jpg?itok=IMo9CIG0

Some of the other buildings have a wooden fascia covering the membrane
instead, and probably just have a drip line.

This method handles steady rainfall, but the roof also mitigates it
(cloudbursts turn into a steady trickle at the eaves). It might not handle
frost or ice dams; they rarely get snow in the Coquille rainforests.

-Erica

On Fri, Mar 13, 2015 at 10:00 AM, <coblist-request at deatech.com> wrote:

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>    1. rain catching on a curve (alex mackenzie)
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> Message: 1
> Date: Thu, 12 Mar 2015 14:01:09 -0700
> From: alex mackenzie <alexgmackenzie at gmail.com>
> To: coblist at deatech.com
> Subject: [Cob] rain catching on a curve
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> We have an variably curved flat shed-style roof (one slope only, egg
> shaped-ish, but inconsistent) on our cob house that we want to add some
> *rain
> gutter* to. It is a metal roof. We were thinking to use some kind of
> flexible UV-friendly pipe slit down the inside curve (it comes in a roll)
> and clamping it on like a hollow pacman chomping down on the roof, but a
> friend was concerned about there not being enough space for the water, that
> it will overflow etc. We were thinking 3 inch?
> It would be either attached as illustrated with an L bracket inside every
> couple of feet (pre-mounted on the roof, then hooking the pipe over this
> and screwing it on) or with under mounts of some kind like a hand holding
> it up (in wood, off the protruding rafters). It can't really go anywhere as
> it is hugging the roof all the way around.
> I like the pipe idea because we can run it around the entire 90 ft
> circumference and up top it will prevent under-roof drip runs while below
> it will catch water down to the very centre bottom where we would run it to
> a cistern and the whole thing is consistent throughout.
> Some have suggested custom wood, copper, hand-hewn metal, etc - but this
> all sounds either too complicated or expensive.
> Does anyone have any thoughts, experience or suggestions before we take the
> dive? I would love to see or hear about other examples of this or other
> solutions.
> We need to collect the water as we are off grid and a well is not an
> option.
> Thanks!
> Alex
>
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