Originally Posted by mutcth
A curious question though: if you went that way instead of a floating floor, wouldn't you need something rigid to adhere the sheet material to?
The membrane would also float and the finished floor on top would act as ballast, to keep everything where it should be. I could see the Schluter product being laid down loosely with the floating floor applied over top of it. I'm just thinking of the orange membrane as a possible underlay that would have the rigidity to keep seams and rivets from telegraphing. I suppose that your finished floor could be glued to this membrane to form a floating 'system' that combines underlay and finished floor. I'm just brainstorming here.
Edited to Add: The product I linked to shows the whole system of grouts, membranes and tiles, etc. What I'm considering as a viable option is just the orange membrane itself as an underlay. The rest of it wouldn't have application here, as grout and tile would not do well in a moving trailer.