Thanks Bob!! No, you have not scared me off!! ;-) The actual issue is a little more complex and actually involves a complete bathroom remodel at a later date...
It is rather pricey but I think in general, closed cell foam beats any other insulation method except, perhaps, blown in celluose.
We would like to tile a second floor master bath which is now carpet with linoleum around the toilet area. I know the linoleum will have to come up, but are t...