[RE-wrenches] Mounting to SIPs, revisited

frenergy frenergy at psln.com
Mon Jan 18 11:15:47 PST 2010


Alan,

        Thanks for the correction, I did in fact use the blue 'roof grip screws' with neopreme washers provided by DP&W for use in OSB.  I better go chug more Ginko.

Bill

Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA  95983
  ----- Original Message ----- 
  From: Allan Sindelar 
  To: RE-wrenches 
  Sent: Sunday, January 17, 2010 10:46 PM
  Subject: Re: [RE-wrenches] Mounting to SIPs, revisited


  Just a note of caution here: "Tech" screws are "Tek" screws, which are essentially a sheet metal thread following a pilot drill point, on a hardened shank. They are intended for mounting only into metal, not wood; the drill point isn't designed to self-pilot into wood, and the drill section is too large in diameter for wood.


  <![endif]--> 
  Allan Sindelar
  Allan at positiveenergysolar.com
  NABCEP Certified Photovoltaic Installer
  EE98J Journeyman Electrician
  Positive Energy, Inc.
  3201 Calle Marie
  Santa Fe, New Mexico 87507
  505 424-1112
  www.positiveenergysolar.com



  frenergy wrote: 
    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: re-wrenches at lists.re-wrenches.org 
      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
           SGSRenewables at Gmail.com
           719.588.3044













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