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SIP splines
Last Post 30 Apr 2009 05:19 PM by Polycore. 2 Replies.
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arhawgfanUser is Offline
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29 Apr 2009 09:03 PM
How much should the splines be taken into consideration for the overall structure of the panel system or are they mainly to be considered for sealing/air prevention in the system ?? There are many variations of the spline out there with some being offered as "standard" installation and some offering as a option to upgrade to a better/superior installation. Are these upgrades worth the extra expense and security of the system overall ??    
Dick MillsUser is Offline
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29 Apr 2009 09:16 PM
One consideration, obviously, is that a 2x spline does have a higher thermal conductivity coefficient than a laminated foam one does, or than two independent pieces of OSB where the foam core is as continuous as it can be at a joint.

And, the second consideration (especially for roofs and high wind load areas) is the strength of the spline (or joint, since steel sips generally don't utilize a spline). For strength, a laminated foam spline might not provide the span capabilities that are required for the design.
PolycoreUser is Offline
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30 Apr 2009 05:19 PM

I know that all SIP's are different, but in our system the splines simply act as a friction-fitting tool that maintains the thermal consistency between two panels. The Polycore panels are not a sheeted SIP, but an embedded SIP, meaning that the structural steel is embedded within the panel. For standard sheeted SIP's you may want to consider the most insulated material available. If you are simply using 2x splines you are effectively creating a thermal bridge at every seam. Anything you can do to minimize the amount of thermal bridging would be beneficial for the overall energy efficiency of the structure.
Polycore Canada Inc.<br>www.polycorecanada.com<br>1-877-765-9267
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