there are little drain/vent slots all along the bottom edge of each piece of
plastic siding. the solvent would have splashed through those.


steve


"Andy Asberry" wrote in message
...
I'm not a chemist so don't know what solvent would do to vinyl. The
part I'm missing from your theory is how did the solvent reach the
Tyvek?

--Andy Asberry--
------Texas-----