I've seen many basement bathrooms being installed and usually its the
concrete slab. The pan is usually secured by the drain assembly and
maybe even some adhesive like liquid nail.
There comes a time in the affairs of man when he must take the bull by
the tail and face the situation. -- WCF
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.