Luke,
Direct Power and Water has an optional mounting foot with five holes in
it for what I think Jeff Randall there referred to as 'Tech' screws to use in
the field between rafters. They are referred to as 'easy feet'. It is designed
to only attach into the roof decking, which I'm pretty sure only required 1/2"
OSB. He claims the same or better pullout values as one lag per regular
foot...there may also be tighter spacing involved for the feet. The choices
are 1 1/2" or 3" long, has a self tapping point so no pre-drill. Add some of
the peel and stick mastic and it's a fast install.
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
----- Original Message -----
From: Luke Christy
To: [email protected]
Sent: Sunday, January 17, 2010 8:24 PM
Subject: [RE-wrenches] Mounting to SIPs, revisited
Esteemed Wrenches,
We have a PV job in the works that will require mounting racking to several
roofs that consist of asphalt shingles laid over SIP panels. The panels are
standard 10" nominal thickness, with 9-1/4" of foam sandwiched by 1/2 OSB on
each side. The rub is that the underside of the panels will be the finished
ceiling (with 5/8" of wood over the OSB).
I found a couple of threads in the archives discussing mounting to SIPs, but
most comments suggest through-bolting, and that is not an attractive option in
this case due to the finished ceiling directly beneath.
The roofs in question are triangular in plan, and are fairly small (~ 15' x
15' x 21')
Does anyone have experience with mounting directly to the outer skin of a SIP
panel?
Suggestions on the best way to approach this problem would be appreciated.
Thanks in advance.
Luke Christy
NABCEP Certified PV Installer™: Certification #031409-25 (Luke Christy)
CoSEIA Certified PV Installer (Luke Christy)
Solar Gain Services, LLC
Monte Vista, CO
[email protected]
719.588.3044
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