[RE-wrenches] crumbling ballast blocks

[Chris Schaefer]

Kirk,

Had the same thing happen to me on a commercial ballasted system installed
back in 2004. Had to be moved around to allow installation of a new roof
system. Replaced all the ballast in 2017. I'm located in Western NY, thus
the same weather you see. The blocks were on a stainless steel pan of which
the array was attached to. I've plenty of ideas as to why they broke down
but no real evidence. I expect it to happen again. Does make me wonder
about the new ballast systems that still call out for the blocks as
ballast. Perhaps poly sand bags?

Christopher

On Wed, Jun 27, 2018 at 4:20 PM, Kirk Herander <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*
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Chris Schaefer’s
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