I would do whatever the landlord specifies.
....well yeah.  Your castle, your rules.


On 1/29/2015 3:51 PM, Chuck McCown wrote:
Some of them you can't walk on. At least that is what they say. I have been told that the membrane company will void the warranty if you walk on the stone. I would do whatever the landlord specifies.

-----Original Message----- From: Adam Moffett
Sent: Thursday, January 29, 2015 1:50 PM
To: [email protected]
Subject: Re: [AFMUG] Nonpen on River Rock Roof


I always just put them on top of the rock in the past.  Never had a
problem (that I'm aware of).  The nonpen sitting on a rubber pad puts
fewer PSI on the roof than a person walking....so theoretically if you
can walk on it you can put a non-pen on it.

One landlord required me to sweep away the rock first.  Same landlord
required a sacrificial piece of EPDM roofing in addition to the rubber
pad that we always used....so IMO he was a little paranoid.

Thoughts on pros/cons. When putting a Non-Pen on a roof with river rock, (if that's what it's called, 1/2"-1" diameter stones, no tar) do you clear the rock and put the non-pen mats directly on the roof, or put the mats and non-pen on top of the rock?


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