It is essential to build a curb for any open area of your shower perimeter that is not enclosed by solid wall. Your shower door may be the only open area, in which case your curb length will be the same length as your shower door.

However, you may have an open wall of your shower, facing the inside of your bathroom. In this case, your curb length will be the total length of your shower door and the rest of the open wall combined.

It is essential to pay close attention to the construction of your curb. Many people may forgo giving their curb the proper materials and building technique because they assume a liner is sufficient to prevent water damage. The curb is equally important to prepare correctly and ensure that proper steps are followed.

All our OneLiner shower kits include Kirb-Perfect which is a 30″ long piece designed to cage your three stacked 2″ by 4″ pieces of wood for your shower curb. However, before installing the curb cage, it is very important to wrap your stacked pieces of wood with a Bituthene Curb Waterproofing seal. This will ensure that the wood is protected from any water damage. You then install the Kirb-Perfect curb cage, fill it with mortar, and you are ready to tile over top of the cage, creating a perfectly water-sealed curb. 

For additional instructions, view this video for a complete demonstration on installing Kirb-Perfect and building a proper curb for your OneLiner shower pan.

If you are using a PVC liner or a PVC shower liner kit, you will still require curb waterproofing. This bithuthene seal acts as waterproofing for over the three stacked 2x4’s. When wrapping the PVC liner over your curb, there will be two small slits at the corners of your curb. The Dam Corners seal over these holes with the X-15 Bonding Adhesive to ensure that you have a watertight curb. You are then ready to use Kirb-Perfect on top of that.