We're looking at installing a poured shower pan in our basement as illustrated in MMM's shower article
http://www.mrmoneymustache.com/2012/12/21/how-to-make-a-relatively-sweet-shower-cheap/.
My current floor in the bathroom has linoleum over concrete. My question is - can I pour the concrete curb and shower pan directly over the linoleum, or do I have to rip out the lino and pour directly over the underlying concrete? Given the age, I'm fairly certain the linoleum has asbestos in it, so if I can avoid removing it that would be preferable.
The linoleum seems to be completely glued to the concrete (not just the edges). I don't see any bubbling and it feels solid, so my gut feel says that a 2"+ thick poured concrete pan sitting on top of it will be sufficiently solid. But I'm not certain. I've seen some suggestions to use mesh lath stapled to vinyl flooring to increase the bonding with concrete poured on top. Given that my existing lino is directly glued to concrete underneath though, I'm not sure I can easily fasten lath to it.
What would other forum members do in my situation?