Why are SIP’s so much stronger?
SIP’s are a structural composite, similar to an 'I'-beam. The skins act like the flanges and the rigid core is similar to the web. The two 15 mm OSB 3 boards, which are autohesively bonded to the CFC/HCFC-free rigid urethane insulation core, work together, rather than against one another. This composite assembly provides stiffness, strength and predictable responses, i.e. in shear tests. Not only do test results show panels are stronger, but real life natural disasters have proven it time and again. The Great Hanshin (Kobe, Japan) and North Ridge earthquakes, hurricane Andrew, a Colorado tornado, a Portland gas explosion and an Omaha fire, have done more to prove SIP strength to the homeowners than the all of the scientific tests.
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