[stevehull]

Old wizard,


I too was amazed that ~ 2000 9 inch crews were used to screw down the 7 inch roof SIP panels into the trusses and only three missed the trusses! And those only by 1/8 th inch. They struck a chalk line on the roof decking as they put up the panels, but they were careful to drive in the screws exactly perpendicular in both directions.

This is where I had help from a contractor that, before this job, had never used SIPS. He was amazed at the strength, quickness of putting it up and how straight and true everything was. He says he will not ever build a "stick" wall again.

Forgot who asked, but this 5/8 inch oriented strand board (OSB) on either side of the SIPS is not the stuff you get at big box stores. Rather, it is far more stable in the presence of water and actually can be left out in open conditions (rain, snow, etc) for 6 months with no degradation. It looks like a resin or something is in it.


Steve