If loose gravel/stones, use 1/2" Rubber mats under non-pen (Primus has them) and clear rock. Do not put on top of the rock, the extra weight will damage the membrane.
Erich Kaiser North Central Tower Consulting [email protected] Office: 630-621-4804 Cell: 630-777-9291 On Thu, Jan 29, 2015 at 3:50 PM, Bill Prince <[email protected]> wrote: > I agree with Chuck. > > If it's on a membrane, then you most assuredly do not want to damage it. > Some are more sensitive than others, so depending on the vintage, I might > even put a pad between the non-pen and the membrane. Then put on your > weights, then sprinkle the removed rock around the whole thing. > > bp > <part15sbs{at}gmail{dot}com> > > On 1/29/2015 12:49 PM, Chuck McCown wrote: > >> Assuming river rock on a membrane. Personally, I would clear the rock, >> make sure it is sitting on the membrane with nothing sharp or pokey that >> can damage the membrane, add the weights then put the river rock back to >> provide sun protection. >> >> -----Original Message----- From: Nate Burke >> Sent: Thursday, January 29, 2015 1:39 PM >> To: Animal Farm >> Subject: [AFMUG] Nonpen on River Rock Roof >> >> 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? >> > >
