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RE: SIPS panels - Structural Insulated Panel System

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Roger:

Actually, MOST but not ALL shingles will lose their warranty on SIPs
(unvented space).  There are some shingles that will retain a warranty
when applied to SIPs.

Regards,

Scott
Adrian, MI


On Wed, 8 Dec 2004, Roger Davis wrote:

> Do you need any type of fire rating on the panels?
> Do the panels have a rating that is valid for both vertical and horizontal
> application?
> If you are using residential type shingles on the roof, the manufacturer
> will not warranty them if applied directly to an insulated deck.
>
> Roger C. Davis
> Architect
> SDS Architects, Inc.
> 205 N. Dewey Street
> Eau Claire, WI 54703
> (715) 832-1605
>
>
> -----Original Message-----
> From: John C. Jones [mailto:john(--nospam--at)struct-engr.com]
> Sent: Tuesday, December 07, 2004 4:47 PM
> To: seaint(--nospam--at)seaint.org
> Subject: SIPS panels - Structural Insulated Panel System
>
> I have a project that's a private high school dormitory.  The Architect is
> very interested in using products that can fulfill multiple tasks.  He has
> suggested using a SIPS panel as both the roof decking and the load bearing
> wall.  A SIPS panel is basically 2 pieces of plywood separated by
> insulation.  The panels are 48" wide and at each joint have actual studs or
> joist members.  The project is in central Alabama and is IBC Seismic Cat B.
> Seismic will be relatively light for this project.  Wind will likely
> control.  The Architect wants this to be his structural deck (14' span or
> so), finish ceiling (yes, it's rough), insulation, and shingle nailer.  The
> walls would be the same except it would receive sheet rock on the interior
> and hardi-plank on the exterior.
>
> My main concerns are:
> 1.  With a conventional plywood roof on H-clips there is movement available
> in the roof.  This product doesn't have this option.  How is this
> accommodated for this system so that temperature doesn't cause visible roof
> bulges?
> 2.  What issues are there with load bearing?  It appears that the plywood is
> actually taking the load.  It really doesn't give me a warm fuzzy feeling.
> What happens if there is a leak that causes plywood failure?  It doesn't
> seem like it would take much termite infestation to cause a problem.
> Bulkier studs are more resistant to both of these.
> 3.  Bolting a plate down and then installing the panel and then nailing
> through the panel into the pre bolted sill plate just seems like a crap
> shoot.
>
> Has anyone out there used this product and can offer advice?  My gut feel is
> that it's probably pretty good as a roof deck/insulation/ceiling, but I'm
> not as comfortable with it as my load bearing wall.  It just seems that
> you're relying on the insulation to do a whole lot of bracing of the two,
> thin load bearing wythes.
>
> John C. Jones, PE
> Barnett Associates
> Pell City, AL
> 205-884-5334
> 205-884-0099 (fax)
>
>
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