[RE-wrenches] crumbling ballast blocks

[cwarfel]

Iam not trying to prolong this thread,but I do want to say that there 
should be an inspectionof the blocks in freeze/thaw areas. We started an 
inspection program of our systems or systems in the area and although we 
don't install ballasted systems, we found enough other things to 
address. On my own 8 year old system zip tie failure was over 50%. It 
opened my eyes to the need to do these inspections, and spec better 
materials at the start.

I remember the survey in Wisconsin regarding the inspecting of fairly 
old solar thermal systems. All the participants really seemed to love 
their systems, but I think over 3/4 of them were not working.


On 7/1/2018 8:02 PM, Jerry Shafer wrote:
> Kirt, Chris, Wrenches
> We have not had any issues other then one or two in Hawaii or 
> California, it might be the location, concrete blocks sitting in the 
> weather all exposed to rain from on all sides and then potential 
> freezing conditions will cause failure of the blocks, the same issue 
> pools will get if there are tiles around the edge when they pop off in 
> freezing conditions but thats just me>
> Jerry
> NABCEP Installer and PVI
>
>
> On Wed, Jun 27, 2018 at 10:20 AM, Kirk Herander <vtsolar at icloud.com 
> <mailto:vtsolar at icloud.com>> wrote:
>
>     All,
>
>     I have a 6 year old ballasted roof system in which about 50% of
>     the solid cap blocks(16”L x 8”w x 4”D) are cracked and crumbing,
>     some are close to rubble. I assume it was a bad batch, but has
>     anyone seen this before? What might be the preventive remedy in
>     the future? A coating of some sort?
>
>     *Kirk Herander*
>
>     *Owner|Principal, VT Solar, LLC *
>
>     */Celebrating our 27^th Anniversary 1991-2018/*
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>     *www.vermontsolarnow.com <http://www.vermontsolarnow.com>*
>
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>
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-- 

          Christopher Warfel, PE
        ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                (401)466-8978

EEI logo <http://entech-engineering.com>
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