How to Make a Hot Mop Shower Pan
A hot mop shower pan is a type of shower pan that is constructed using a layer of mortar that is then covered with a layer of hot asphalt-based waterproofing membrane. This type of shower pan is known for its durability and watertightness. However, it's important to remember that it is a very technical process and requires specific skills and materials.
Here's a step-by-step guide on how to make a hot mop shower pan:
1. Prepare the Subfloor:
- Clean and Level: Ensure the subfloor is clean, smooth, and level. Use a concrete patch or a self-leveling compound to fill any holes or gaps.
- Slope: Create a slope towards the drain using a concrete screed or a level. The slope should be at least ¼ inch per foot.
2. Install the Drain:
- Position and Secure: Place the shower drain in the desired location and secure it to the subfloor using screws or bolts. Make sure the drain is level and sits slightly below the subfloor to allow for the mortar bed.
- Connect to Plumbing: Connect the drain to the plumbing system.
3. Build the Mortar Bed:
- Mix Mortar: Use a high-quality mortar mix, following the manufacturer's instructions.
- Apply Mortar: Apply the mortar to the subfloor, making sure to completely fill the area around the drain.
- Level and Compact: Use a trowel and a level to ensure the mortar bed is smooth and level.
4. Apply the Hot Mop:
Note: This step requires specialized equipment and safety precautions. It is highly recommended to hire a professional for this part.
- Heat the Asphalt: Heat the asphalt-based waterproofing membrane according to the manufacturer's instructions.
- Apply the Membrane: Apply the hot asphalt membrane to the mortar bed using a mop. Make sure to overlap each layer by at least 2 inches.
- Smooth and Seal: Smooth out the membrane and ensure it completely seals around the drain.
5. Build the Curbing:
- Install Tile Backer Board: Install tile backer board around the perimeter of the shower pan. Use a moisture-resistant adhesive to secure it to the subfloor.
- Build the Curbing: Use mortar to build the curbing to the desired height.
6. Waterproof the Walls:
- Apply Waterproof Membrane: Apply a waterproof membrane to the walls of the shower enclosure, ensuring it overlaps with the membrane on the shower pan.
- Apply Mortar: Apply mortar over the membrane to create a smooth surface for tiling.
7. Tile the Shower Pan:
- Prepare Tiles: Prepare and cut the tiles according to the shower pan's design.
- Apply Thin-Set Mortar: Apply thin-set mortar to the shower pan and walls.
- Install Tiles: Install the tiles, making sure they are level and aligned.
8. Grout and Seal:
- Apply Grout: Apply grout between the tiles.
- Seal: Seal the grout to prevent water from penetrating the shower pan.
Important Considerations:
- Safety: Always wear appropriate safety gear when working with hot asphalt.
- Ventilation: Ensure proper ventilation during the hot mop application process.
- Experience: Building a hot mop shower pan requires specific skills and knowledge. It's essential to hire a professional if you lack experience.
By following these steps, you can create a durable and waterproof hot mop shower pan. However, remember that safety and expertise are crucial for this type of project.
