Posted 1/10/2019 17:09 (#7235378 - in reply to #7233014) Subject: YES!!
East of Broken Bow
That was the stuff I was referring to, but at the time couldn't think of the name. Solid vinyl, will not swell in water, even where you cut it.
The gap recommended around the edges I think is to allow for the different expansion/contraction properties of vinyl compared to the wood of the house.