The sip business is a business that has evolved over the last good number of years.
The product they are selling today probably isn't constructed with the same materials it was when they first started. OSB has changed, foam has changed, the glue has changed, the glue in the OSB has changed.
It may not be of use to get a long term durability test on those older products as the are so different then today's current products.
Just my opinion....
Jim Rogers
