EPDM Roof Jacks/Flat Roof [RE-wrenches]

[Graham Owen]

Hey Jeff,

I have always used all metal flashings on flat roofs since most flat 
roofs in So Cal have a hot mop roof application process, which can cause 
burns on the boots resulting in weakness or penetrations.  On sloped 
roofs I like the Oateys with the rubber boots since this allows for a 
lower array profile and the application of comp shingles or tiles does 
not present a possibility of burnt boots.

Your installation on a flat Hypalon roof with 7” standoffs leaves you 
with several options.  If the roofer recommends all EPDM flashings then 
that is probably the way to go since the roofer will warranty roof 
exposure.  The best sealant that I am aware of for bonding EPDM to 
Hypalon is “UltraGuard ® PVC Membrane Adhesive” manufactured by Johns 
Manville.  This is their product description:  UltraGuard PVC Membrane 
Adhesive is designed for bonding Ultraguard PVC membrane to metal, wood, 
concrete and certain roof insulations and should be used in adhered wall 
flashings or other vertical surfaces.  Solvent-based membrane adhesive 
does not have slope limitations.  The adhesive is easily spread, has 
good initial tack and dries to an elastomeric bond.

I would try and keep as many of the EPDM roof flashings in the shade of 
the array as possible as opposed to being in direct sunlight, which over 
the course of a decade or two seems to make almost any non-metallic 
material deteriorate.

I am wondering if the Hypalon seams on your roof are glued or welded 
with a heat process?

BTW, the latest news I have from the CEC is that solar energy is so 
popular that the rebate funding, which was supposed to last through 2006 
will be exhausted by the end of 2003.  It seems like every time solar 
contractors get comfortable sucking on the rebate nipple the hog gets 
butchered before we get weaned.  I am now refocusing on selling solar 
thermal installations in L.A., which can be challenging, but at least no 
one can pull the plug on me.

Best regards and good luck,

Graham Owen
GO Solar Company
www.solarexpert.com 

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