Extending a Kerdi Shower Pan: A Guide to DIY Success
Expanding your shower space? Or perhaps you're dealing with a slightly off-sized pan? Whatever the reason, extending a Kerdi shower pan is a common project for DIYers.
Why Choose Kerdi?
Kerdi shower pans are renowned for their waterproofing capabilities. They consist of a rigid foam base with a waterproof membrane. This makes them a popular choice for shower construction, ensuring your bathroom stays dry.
Methods for Extending a Kerdi Shower Pan
There are two primary methods for extending a Kerdi shower pan:
1. Extending with Kerdi-Board
This involves using Kerdi-Board, a waterproof cement board designed specifically for use with Kerdi membranes.
Steps:
- Measure and cut: Measure the desired extension and cut the Kerdi-Board to size using a circular saw or jigsaw.
- Prepare the existing pan: Ensure the edges of your existing pan are clean and free of debris. You can use sandpaper to smooth any rough edges.
- Apply Kerdi-Fix: Apply a layer of Kerdi-Fix adhesive to the existing pan's edge and to the back of the Kerdi-Board extension.
- Attach the extension: Carefully press the Kerdi-Board extension onto the existing pan, ensuring a strong bond. You can use clamps to help secure the extension while the adhesive dries.
- Apply Kerdi-Band: Seal the joint between the original pan and the extension with Kerdi-Band. This provides a waterproof barrier.
- Allow for drying: Allow the Kerdi-Fix and Kerdi-Band to cure thoroughly before proceeding with the rest of your shower construction.
2. Extending with Mortar Bed
This method uses a traditional mortar bed to extend the shower pan.
Steps:
- Create a form: Construct a form to hold the mortar bed in place. This form can be made from plywood or other suitable materials.
- Prepare the existing pan: Ensure the existing pan's edge is clean and level.
- Mix mortar: Mix the mortar according to the manufacturer's instructions.
- Apply the mortar: Carefully apply the mortar to the existing pan's edge and within the form.
- Level and smooth: Use a trowel to level and smooth the mortar bed, ensuring it is flush with the existing pan.
- Allow for curing: Let the mortar bed cure completely before proceeding with the next steps.
- Apply Kerdi membrane: Apply the Kerdi membrane over the entire extended area, ensuring a seamless transition from the original pan.
Important Considerations:
- Slope: Always maintain the correct slope for proper drainage.
- Drainage: Ensure the drain's location is suitable for the extended pan.
- Materials: Use high-quality materials specifically designed for shower construction.
- Professional help: If you're unsure about any aspect of this project, consult a professional.
Conclusion
Extending a Kerdi shower pan is a viable solution for customizing your shower space. By following these steps and taking the necessary precautions, you can achieve a waterproof and durable shower pan.
