by GPW » Sun Jan 15, 2012 9:06 am
XTS, having installed two of these type units in houses, the edges are usually covered with a waterproof moulding or rocked’ up to the edge and caulked... The floor must be supported , but instead of mortar and concrete , spray foam in a can may serve for this on a trailer , and be lighter ... if you’re putting this over a wood floor (as in a trailer) I think you’d want to waterproof the whole area as much as possible first ... sooner or later it’s going to get wet ... somehow ...

There’s no place like Foam !