
Tile Over Shower Pans INSTALLATION GUIDE
To help guide you through the shower pan installaon process, we have provided the following Installaon Guide, which is
intended to provide an easy to follow step by step process for the installaon of your Tile Redi® shower pan, whether you are a
professional ora first-me novice. In connecon with your shower base and shower project, please comply with the
recommendations and standards established for such projects from me to me by the Tile Council of North America, Inc.
INSTALLATION INSTRUCTION FOR SHOWER PAN WITH PVC DRAIN
1. Frame out shower stall area to shower pan dimensions.
2. Sweep out any debris from sub floor.
3. Test fit shower pan drain housing into subfloor bore hole. DO NOT NAIL OR SCREW ANYTHING INTO THE PAN. DO NOT SAND,
CUT, OR MAKE ANY CHANGES/MODIFICATIONS TO THE SURFACE OF THE SHOWER PAN WHATSOEVER.
4. Make sure the shower pan is aligned properly and fits snuggly against the shower frame studs onall sides.
5. This step depends on whether there is access to the drain connecon from below the subfloor:
a. If there is access from the subfloor below, then cut a secon of drain pipe (PVC, asapplicable to the type of drain) which is
long enough to extend below the subfloor and easily make a connecon to the waste water pipe.
b. If there is no access from the subfloor below, then make sure the drain pipe stubbed up from the subfloor is adjusted to a
height sufficient to fit properly into the shower pan drain connection.
6. Turn the shower pan over and notethat there are ribs under the shower pan floor. Calculatethe amount of mortar needed by
measuring the height from the rib booms that rest onthe substrateto the underside ofthe pan floorat the deepest point in
between the ribs. Once you have that value, calculatethe thickness (depth) of your mortar base (Type N orS Mortar) using the
formulas listed below based onthe type of shower pan you purchased:
a. Redi Trench® / WonderFall Trench® / Redi Free® Trench Pans:
Subtract 1/2” from deepest rib measured in Step 6.
b. Redi Base® & Redi Free® (Non-Trench) / Wonder Drain® Pans: (Le or Right Drain ONLY) Subtract 1/4” from deepest rib
measured in Step 6
c. Redi Base® & Redi Free® (Non-Trench) / Wonder Drain® Pans: (Center Drain ONLY)
Subtract 1/8” from deepest rib measured in step 6, PROVIDED the mortar base should always be at least 1/2”.
Please note, do not place the mortar directly on a wood or Gyp-crete substrate. First, waterproof the wood substrate with a fluid
applied waterproofing membrane or NO. 15 or No. 30 roofing paper so the wood does not absorb the water from the mortar.
7. Spread your mortar base (should be a milk shake consistency), EVENLY ACROSS THE SUBFLOOR AT THE THICKNESS
CALCULATED FROM STEP 6a, 6b, or 6c, and offset 1“ from each outside edge of the pan with excepon of the curb side.
Mortar will protrude out from under the curb, run the finished side of trowel along curb face to backfill any excess mortar.
a. If there is access from the subfloorbelow and you followed step 5.a. above, then brush PVC adhesive onthe outside of
the cut drain pipe and quickly insert into drain connecon, and then be sure the drain pipe extends far enough below the
subfloor so it can be conveniently connected to the waste water pipe following the installaon.
b. If there is no access from the subfloor below and you followed step 5.b. above then brush PVC adhesive onthe drain
pipe stubbed up from the subfloor, then quickly insert the stubbed-up drain pipe properly into the shower pan drain.
8. Place the pan in the mud base and firmly but gently shimmythe pan (applying pressure in drain locaon first) into the mud
so that (i) the drain is fully supported by mud at the bore hole in the substrate, and (ii) the ribs are completely filled with the
mud alternately applying hand pressure to the right and le sides ofthe pan floor unl the pan ribs come within 1/8”
clearance ofthe subfloor. Level all pan sides and the let the mortar dry overnight.
Important: DO NOT STEP INTO THE SHOWER PAN ONCE THE SHOWER PAN HAS BEEN SET AND LEVELED UNTIL THE
MORTAR HAS CURED COMPLETELY
9. Install the shower backer board and water proofing in accordance with the standards established by the Tile Council of North
America, Inc.
10. Seal and waterproof joint between backer board and the shower pan splash walls using Redi Flash® or 100% silicone, and
then cover the joint with a fluid applied waterproofing membrane onthe shower walls over the joint. Allow the mortar bed
to dry in accordance with the instrucons ofthe mortar bed manufacturer.
11. Adjust the height ofthe drain as necessary to accommodatethe flooring covering.
12. Set your le using a white modified thin-set and a notched trowel as specified by your thin-set manufacturer based on your
le size. Tile Redi recommends the modified thin-set products found in Appendix A.
13. Tile the rest ofthe shower