How We Installed Schluter-Kerdi Shower System in Our Master Bathroom

I mentioned in yesterday's post that I want to share with you how we installed the Schluter-Kerdi waterproofing system and why we chose to go that route instead of another technique. The system is a pliable membrane and foam product that is used to waterproof wet areas in a bathroom. There are half a dozen or so methods for waterproofing and prepping a shower for tile but we decided to use the Schluter-Kerdi  system for a number of reasons:

  • DIY friendly with exact, easy to follow, instruction PDF on the website
  • the foam panels are MUCH lighter in weight and easier to maneuver and cut than the alternative backer boards
  • the foam panels are actually waterproof so there is no need for additional waterproofing over the panels
  • confidence in the product - no guessing games

The only "con" to using the Schluter-Kerdi system is that it is more expensive than other products. We were willing to pay the premium for the peace of mind that our shower absolutely won't leak. We figured that since we are saving thousands of dollars in labor by doing this renovation ourselves, it was worth it to spend a little more on a product that we were confident in. We used this waterproofing system for our shower and around the bath tub.

Here's everything on the supply list:

Shower Checklist (dragged).jpg

After all the plumbing was set in the floor and the wall, John screwed the Kerdi Panels to the wall studs using screws and Kerdi Washers (these metal washers help distribute the pressure so that the screw does not drill clear through the foam panel. 

Next, John used a mesh tape to cover all of the panel joints (where the Kerdi panel butts up to the Sheetrock), puttied over the mesh, let dry over night and then used a block sander to sand the joints until they were smooth. The mesh tape helps increase the stability of the panels.

John used the Kerdi Band product to seal and waterproof the corners of the shower, the screw/washer holes and the seams between two Kerdi panels. Using an unmodified thin set mortar (mixed in a bucket with a little water) and notched trowel, he puttied the corners and screw holes, cut the felt Kerdi Band to size and smoothed it onto the wet thin set mortar using a wide putty knife to smooth out any bubbles. 

John is planning to tile the tub and shower walls this week. When that is finished, he will install the Kerdi pan on the floor of the shower (which is a similar process to the rest of the Schluter-Kerdi system) and then tile the shower floor and the rest of the bathroom floor.

I'll update this post with pictures of John installing the shower base pan. Remember the tile we are using? I still love it and I can't wait to see it all laid out in here!

Keep following me on Instagram to catch real time updates in my Stories! 

Emily WardComment