Uni-Solar & Class A fire rating [RE-wrenches]

[matthew tritt]

Peter,

No problems so far. The fire rating issue hasn't reared it's ugly head yet,
but I contacted the distributor on this issue. They're getting back to me
later today, but, yes; the PVL also has a C rating. Class C is accepted
throughout the state (except San Diego for some reason). It's my
understanding that it isn't combustible, but will smolder if something big
and burning sits on it for a long enough time. Logically (if logic is
important in this issue) the roof sheathing (plywood and tar paper) would
get just as hot if there were a burning Molotov cocktail directly on the
metal roofing as with a 1/8th " layer of PVL intervening. The PVL might
retain heat a trifle longer because of it's greater mass/heat retention? I'm
not sure about the gooey stick-um layer underneath, but don't all composite
fiberglass shingles consist largely of tar??? Surely the PVLs have far less
potential for sustaining a fire than composition shingles.

Matt
----- Original Message -----
From: <asap at podnine.com>
To: <RE-wrenches at topica.com>
Sent: Monday, December 09, 2002 12:25 AM
Subject: RE: Uni-Solar & Class A fire rating [RE-wrenches]


> Although it may require you to educate the inspectors I bet PVL could get
> done and permitted in San Diego County.  If you or anyone needs backup
from
> City of Oceanside or City of Santa Ana inspectors for shingles on plywood
> substrates, let me know.
>
> The SHR-17's UL gives the product a thumbs up as solar electric product
and
> as a Guide TFWZ "listed prepared roofing material" with Class C rating,
> true.  I believe the SHR's have the itinerant ICBO ratings too...   But it
> did come up and was called for and that UL was good enough for their
> concerns on plywood/roofing paper substrate--they had more problems with
> penetrations and wire collation afterwards.   I haven't seen the PVL's
> actual UL...maybe it does say Class A?  What makes something Class C
again?
>
> For the PVL laminates on metal roofs:  CHALLENGE.  EDUCATE.
>
> Matt T.?  PVL's anyone?  Any problems permitting UniSolar PVL's over
> listings?
>
> There's 211kW that I know of riding on that SD county interpretation, I
> assume this was the new guy at County.  The old main dude went up to San
> Marcos.  Maybe some form of punishment.
>
> Peter
> ASAP POWER!
>
> **********
> Mo,
>
> On the installations we do here in Northern Calif. the metal roof
> achieves a Class A fire rating by using a special underlayment
> beneath the metal roof. I could check with my roofer and get the
> specific info if anyone is interested.
>
> David Henry
> ***********
> >According to the head inspector in San Diego County, any Uni-Solar
shingle
> >or laminate for metal roofs will not be permitted for installation.  It
is
> >because they require Class A fire code materials and Uni-Solar has only a
> >Class C rating.
> >
> >If this is the case, combined with lower efficiencies and so on, its no
> >wonder that there is slow adoption of these types of products.
> >
> >--
> >Mo Rousso
>
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