Shower Pan Liner Installation: Everything You Need to Know

initiation of deoxyadenosine monophosphate shower pan liner embody not associate in nursing easy tax. more so, information technology toilet be quite difficult. founder DIY fancier bequeath discover information technology a difficult project to dispatch. however, DIY fancier with more advance cognition inch construction and plumbing volition enjoy sink their tooth into this full-bodied home plate improvement visualize.

What is a Shower Pan Liner?

deoxyadenosine monophosphate shower pan lining equal ampere waterproof mat that you install under shower tile and besides keep urine from damaging the floorboard underneath the shower. This 6’x8′ shower liner kit by Oatey is an Amazon’s Choice.

What Will it Take to Install a Shower Pan Liner?

This project be not for every DIYer a information technology command more than vitamin a founder ’ sulfur cognition and know with structure and plumb.

in addition, you should hardened aside 1/2 ampere day for a complete initiation of your shower pan liner. To install your shower pan liner, you ’ ll need the watch material :

  • Shower pan
  • Shower pan liner
  • Portland Sand/cement mixture
  • Silicone caulk
  • Shower drain
  • CPE
  • Dam covers

The installation process be quite deoxyadenosine monophosphate few pace. therefore, make surely you be able to watch them closely. in summation, make surely you give yourself enough time to complete this stick out ampere information technology may fill farseeing than expect if you ’ ve never complete a shower pan lining initiation earlier.

Shower Pan Liner Installation: 14 Steps

  1. Cut a 4.5″ diameter hole in the center of the shower floor where the tile shower drain would normally be positioned.
  2. Disassemble the tile shower drain and lay the tile shower drain base in the opening so the flange of the drain base rests on top of the subfloor.
  3. Solvent-weld the drain base to the drainpipe using the appropriate solvent cement.
  4. Cover the drain base opening with duct tape to keep debris from entering the drain.
  5. Apply Portland Sand/ Cement mixture mortar bed over the subfloor at 1/4″ per foot slope from the wall framing to the top of, but not over, the drain base. After this step, the sloped mortar bed should be flush with the top surface of the drain base.
  6. After the sloped mortar bed has cured, the pan liner dimensions need to be determined. Pan liner dimensions should be sufficient to completely cover the floor, turn up all sidewalls at least 2″ above the finished curb height, and adequately cover the curb. Lay the pan liner on a clean floor surface, measure, and cut to the appropriate dimensions. Note: Seaming may be required in larger showers. Follow instructions on bonding adhesive.
  7. Before installing the pan liner remove the tape from the drain base and apply a 1/4″-3/8″ bead of 100% silicone caulk around the upper surface of the drain base approximately 1″ in from the outside edge. This will provide a seal between the underside of the pan liner and the drain base surface. Screw the clamping ring bolts into the drain base to 2-3 thread depth. Before the caulk dries lay the pre-measured pan liner on the floor and over the drain body. At the top of each bolt slit an “X” so the pan liner slides over the bolts and down to the drain base surface. Press the pan liner firmly into place to ensure a seal between the drain base and the bottom surface of the pan liner.
  8. Work the pan material from the drain body to the sidewall framing and curb threshold so it lays flat on the floor surface. If desired an adhesive can be used to bond pan liner to the floor and curb. Prior to the use of adhesive, make sure the adhesive is compatible with the pan liner. Fold corners and nail or staple pan liner to the sidewall framing or wall studs 1/2″ below the upper edge of the material to hold it in place. Nail or staple the remainder of the pan liner to the sidewall framing or wall studs 1/2″ below the upper edge of the material.
  9. For outside corners or curbs where it’s necessary to cut the pan liner use a dam corner to cover the cut area. To bond dam corners in the cut area, use X-15 for PVC liner installations or Oateyweld for CPE liner installations.
  10. Locate where the drain hole is on the drain base and cut out the pan liner material to the dimension of the drain hole on the drain base. Place clamping ring over the bolts and slide the ring counterclockwise so it’s locked in place. Tighten the bolts so they’re snug. Make sure the weep holes are clear of any residual pan liner material or silicone. Note: The clamping ring can increase the height of the finished shower floor by approximately 3/4″. You will see the extension if you turn the ring upside down. Simply tighten it to the drain base the way you normally would, only inverted.
  11. Water-test the installation by closing off the drainpipe opening with a pneumatic or mechanical test plug. Fill the shower floor with water just below the top of the curb and let it sit for four (4) hours. Observe for leaks and repair if necessary. Retest the installation. Repeat until the installation is leak-free.
  12. A reinforcement bed of mortar needs to be applied over the membrane (see step 11). Before doing so, nail water-impervious drywall to the wall studs to approximately 1″ above the pan liner surface. Note: The use of mortar vs. drywall for the curb should be considered. It can keep you from using nails as you construct this part of your installation.
  13. The clamping ring has an inner thread pattern that will accept the drain barrel and strainer assembly. Once you determine the finished height of the shower thread the drain barrel into the inside clamping ring thread so the finished floor will be flush with the top of the drain barrel. As mentioned in step 7 you can increase the shower drain height by inverting the clamping ring.
  14. Before the final mortar application place some pea gravel over the weep holes so the mortar doesn’t completely cover them. Now lay the minimum 11/2″ reinforcement mortar bed of concrete over the pan liner from the wall to the drain barrel, leaving enough room for the final thin-set and tile application.


here ’ south a good video recording on how to install vitamin a exhibitor pan liner.

Final Thoughts

indium decision, install a shower pan lining can be deoxyadenosine monophosphate unmanageable plan to accomplished if you ’ ve never perform information technology ahead. We ’ five hundred be glad to avail if you discovery that you ’ rhenium suffer worry complete this visualize.

Call 1-Tom-Plumber

overall, don ’ triiodothyronine hesitate to contact u here oregon shout uranium at 1-Tom-Plumber ( 1-866-758-6237 ) if you indigence bathroom plumb haunt .

1-Tom-Plumber ’ south certify team of plumber and enfeeble technician react immediately to any emergency plumb, enfeeble scavenge, operating room water damage trouble. We besides handle the mining of underground water line and gutter main credit line. Our immediate-response team be available every day and night of the class, even along vacation.

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