Paint Concrete Floor In House

How do I make a shower with using my existing concrete floor?
I am remodeling my bathroom and the house is on a slab. The room is stripped to the stud walls right now and I have installed drains. Which right now are roughed in, as such the drain pipe for the shower I want to put in is 2 inch and still has a rough cut opening around it. I am looking for the most economical way to have a functional shower floor (pan). Walls and ceiling I pretty much have figured out but it’s the floor! Can I use the existing concrete florr possibly adding more concrete to get my 1/4″ taper per foot? Paint and seal it? I need some ideas. Thanks.
Although you might not think so, building a custom leak-free shower is actually quite tricky.
The process has evolved over the years, in past days a pan made out of lead was common, but they were guaranteed to fail given enough time. These days, using a membrane material is the de-facto standard, although they are not foolproof (you have to be careful with the seams, slope and your drain connection to the membrane).
A somewhat related method using a product called Kerdi from Schluter Systems (http://www.schluter.com/) is becoming popular – but the material is somewhat pricey. You can buy an ebook online from a world-class pro telling you exactly how to build a Kerdi shower: http://kerdishowerbook.com/
You can find loads of resources for creating showers here:
http://www.johnbridge.com/serv02.htm
Good luck with your project.
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