Where exterior wall vent pipes are necessary, chases can be formed in the foam cores. Island vents or loop vents are also common practices and can be found in the plumbing codes. Less Job site waste means less landfill use. Use of fast growth harvested farm trees rather than old growth forests. Lower reported embodied energy costs.
SIPs are a structural composite, kind of like an 'I'-beam.
The skins act like the flanges and the rigid core similar to the web. In short, the three components work together, rather than against one another. This composite assembly yields stiffness, strength and predictable responses. Not only do test results show panels are stronger, but real life natural disasters have proven it time and time again. Fire requires three components, fuel, ignition and oxygen.