I am planning on putting a custom shower in my basement and was not sure on how to handle the floor. The plumbing is roughed in but inside the shower is just a flat concrete floor ( the floor was cut to add the drain.) I feel I need to add some slop to the drain. I heard of a dry mortor bed but I am not sure if this is the correct solution. I plan on tiling the entire shower, (floor and walls). I do have cement board for the walls but I am unsure how to tackle the floor. Thanks.

Slope of the floor towards the drain should be 1/4" per foot. To make sure you have proper pitch you may need to install the dry mortar bed. It also will work better with the tile installation. Too much moisture from the concrete slab may not bond the tile properly. Add moisture in a shower and the chances increase of improper bonding. You can check the slab w/ a moisture meter. Check thinset manufactures recommended moisture level.
If you have the slope and OK w/ moisture, go for it. Make sure the cement board is tight to the floor and seal that seam before tiling.
Another option would be install a fiberglass shower pan and just tile the walls. Then you know you have the pitch. It will be less problematic.

I guess I need intructions on how to do the dry mortor bed. Any help is apprciated. Thanks

http://www.thetiledoctor.com/howto/showers4.cfm

That said I consider myself handy and unafraid to do most things, but I wouldn't try this, prefab shower floors look nice enough for me and the tile work I added to the wallls draws the eyes away anyway.

Edit: Not sure why I liked that page, I started reading the article myself. There are like five pages to it that can be found on the left.

Here is another link from John Bridge, a true tile guru, I wish that he worked in the Minneapolis area.

http://www.johnbridge.com/vbulletin/...723#post103723

You can also check at a local tile shop. They typically hold how to classes (so they can sell more tile).

Here is another link for something to help with getting the correct pitch on the shower floor. It is what I am going to use.

http://www.quick-pitch.com/

Good Luck and let us know how it goes.

Dan

Good link Dan!