Building a shower pan

newmex999

I am in the process of building a mud shower pan. I have looked at many sites and some show blocking in between the studs to staple the shower pan liner too and other sites have no blocking and staple directly to the studs.

Ok, so what is the correct or preferred method? And if it is the "block" method, what advantage does this provide?

Also, what is the procedure where the shower pan liner wraps the curb? How do you actually cut/fold/glue the liner to make this area where the horizontal curb meets the vertical wall waterproof?

Thanks!

Bob Mariani

at the corners you tuck and fold the membrane and apply a small corner patch. This patch piece shaped like a figure eight will assure the corner is sealed. I also would block between the studs to provide an even nailing area thus avoiding sags in the membrane.

Gary in WA

http://books.google.com/books?ei=Vu8...Books&as_brr=3
Enjoy!
Be safe, Gary

__________________

newmex999

How far down does the bottom layer of cement backer board go? I have read anywhere from 1/4 inch to 1 1/2".

What is the recommended distance and does this mean the backer board goes that distance up from the pan liner (membrane) which means the bottom of the cement board is actually underneath some of the mud or from the bottom of the tiled floor, which means the bottom layer of cement board never touches the mud?

Mickey53

My contractor had me put cement board on the studs 1 1/2" above the first layer of concrete. This helped to hold the membrane in place. Then he poured (packed) the second layer and in the back of the shower the concrete shower pan overlaps the concrete board by about an inch. Remember that behind the backer board is both the membrane going up the studs about 6 inches and then the 6 mil plastic on the studs overlapping the membrane.