[RE-wrenches] Sharp racking on cement roof tiles

[ASAP POWER! 2]

Wm,
Client with ancient barrel tile wanted to keep the precious and didn't want
us breaking a single one (we cracked three or four just investigating with a
195lb person up there (me).  Roofer was called in.  Tile was removed under
the array all the way to eave.   Comp shingle was laid under top row of tile
and all the way to eave.  PV array was installed and framed (centered)
nicely.  Two rows of barrel tile were replaced below bottom edge of array to
eave.  One could not see posts or flashings under the array, and gave the
array a floating look over the regular tile roof common to the rest of the
rooftop.  Water drained into rain gutter at edge of eave underneath array.
Water drained over AND under last two rows of barrel tile into gutter
solving aesthetic issue.  Cooling air flow was still sufficient under array.

Peter D. 

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William
Miller
Sent: Wednesday, October 29, 2008 9:55 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Sharp racking on cement roof tiles

Max:

We had a client who, on a barrel tile roof,  insisted on removing tiles from
under the array but wanted to keep tiles below the array.  There was no good
way to divert water from under the lower tiles.  The roofer first tried
using some roll roof that cracked and then used lead flashing.  There was
still a mosquito pond where the water pooled.  Also, the "built in" 
look creates cooling flow restrictions.  We eventually gave up on the built
in look.

Wm


At 08:13 PM 10/29/2008, you wrote:
>Daryl, the best way to deal with it is to take the tiles off under the 
>array. This will give the system a lower profile and a "built in" look.
>The other choice is to drill through the tile to get into the rafters. 
>I've put a system in the Cayman Islands and you want to make sure you 
>do it according to spec and then some when you have the potential for 
>hurricane class winds.....
>Max Balchowsky
>Design Engineer
>Empire Solar Solutions
>562-244-7068


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