liner question

As far a smooth wall are you referring to the double layer stuff or heavy wall? I think heavy wall is worth the extra cost i wouldn't recommend the double layer stuff even if it was half the price

Yeah i have installed a couple of thet type and will never do it again i was not impressed at all

ctswf said:

what was it that made you dislike it

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It is very easy to accidently kink it a little and then the inner layer sticks out that inner layer just laps over itself and can easily get snagged with a brush. And i have seen at least 8 or 9 in the past few years with the inner liner snagged and bent up. Heavy flex is way more durable and still smooth wall. And honestly regular light wall cleans down fairly well and i feel is more durable that that stuff. But my choice would be heavy flex

you could do that but it would not be to code and it would void the ul listing

That would be better than the pink stuff.

wow thats funny bart and kind of sad

honestly i dont doubt that roxul would work fine but it has not been tested and there for is not approved for that application. And that fact will cause you problems if anything ever goes wrong.