Installing a bathroom floor on uneven or sloped ground can be challenging, but it is possible with some extra effort and the right materials. Here's a general outline of the steps you can follow:
Assess the Ground: Before starting the installation, assess the condition of the ground and identify the areas that are uneven or sloped. Determine the extent of the irregularities to plan the best course of action.
Leveling: If the ground is not severely sloped, you may be able to level it using a self-leveling compound. This material is designed to create a smooth and level surface. Clean the area thoroughly, and then follow the manufacturer's instructions to apply the self-leveling compound.
Slope Correction: If the slope is more significant, you might need to use mortar or concrete to build up the lower areas to match the higher ones. This process can be time-consuming and may require some expertise, so consider seeking professional help if needed.
Subfloor Installation: Once you have a relatively level surface, install a subfloor made of plywood or cement backer board. The subfloor provides a stable base for the bathroom flooring. Use shims or additional layers of subfloor material to address any remaining unevenness.
Waterproofing: Bathrooms are prone to water exposure, so it's crucial to ensure the floor is properly waterproofed. Apply a waterproofing membrane or a liquid waterproofing product over the subfloor before proceeding with the final flooring installation.
Flooring Selection: Choose a type of flooring that is more forgiving to uneven surfaces. For example, luxury vinyl planks or tiles, as well as laminate flooring, can often accommodate minor irregularities.
Floating Flooring Installation: Consider using a floating floor installation method, where the individual planks or tiles are not glued or nailed down but rather interlock with each other. This allows the flooring to "float" above the uneven ground and provides some flexibility to adjust for slight variations.
Flexible Grout: If you're using tiles, opt for a flexible grout that can accommodate small movements and irregularities without cracking.
Proper Finishing: Trim and finish the edges neatly to complete the installation. Use baseboards and other molding to cover any gaps or imperfections along the walls.
Keep in mind that while these steps can help you install a bathroom floor on an uneven or sloped ground, achieving a perfectly level floor may not always be possible. It's essential to manage your expectations and ensure that the floor is safe and functional for everyday use. If you encounter significant challenges during the process, it's best to consult with a professional contractor who can offer more tailored solutions for your specific situation.