When it comes to creating a waterproof and durable wet room, applying a wet room membrane is a crucial step. As a leading wet room membrane supplier, I've witnessed firsthand the importance of understanding the differences between applying these membranes on floors and walls. In this blog post, I'll delve into the key distinctions, best practices, and considerations for each application, helping you make informed decisions for your next wet room project.
Differences in Surface Preparation
One of the primary differences between applying a wet room membrane on floors and walls lies in the surface preparation. Floors typically require more extensive preparation due to the weight and movement they endure. Before applying the membrane, the floor surface must be clean, dry, and free of any debris, dust, or grease. Any cracks or uneven areas should be repaired using a suitable patching compound, and the surface should be primed to ensure proper adhesion of the membrane.
Walls, on the other hand, generally require less intensive preparation. However, it's still essential to ensure that the wall surface is clean, smooth, and free of any loose paint or plaster. Any holes or gaps should be filled, and the surface should be primed to promote adhesion. Additionally, it's important to check for any signs of moisture or water damage on the walls, as these issues must be addressed before applying the membrane.
Application Techniques
The application techniques for wet room membranes also differ between floors and walls. When applying the membrane on floors, it's important to work in small sections to ensure that the membrane remains wet and workable. Start by cutting the membrane to size and laying it out on the floor, leaving a small overlap at the edges. Use a roller or trowel to smooth out the membrane and remove any air bubbles, ensuring that it adheres firmly to the floor surface.
For walls, the application process is similar, but there are a few additional considerations. When applying the membrane on vertical surfaces, it's important to work from the bottom up to prevent the membrane from sagging or pulling away from the wall. Use a roller or brush to apply the membrane in a thin, even layer, and ensure that it covers the entire wall surface, including any corners or edges. It's also important to overlap the membrane at the seams to create a watertight seal.
Membrane Selection
The type of wet room membrane you choose will also depend on whether you're applying it on floors or walls. For floors, it's important to choose a membrane that is durable and resistant to wear and tear, as floors are subject to more foot traffic and movement. PVC Waterproofing membranes are a popular choice for floors, as they are strong, flexible, and resistant to water and chemicals. They are also easy to install and maintain, making them a practical choice for both residential and commercial wet rooms.
For walls, you may have more flexibility in terms of membrane selection. Polymer Waterproofing membranes are a popular choice for walls, as they are lightweight, easy to install, and provide excellent waterproofing protection. They are also available in a variety of colors and finishes, allowing you to choose a membrane that complements the overall design of your wet room.


Ventilation and Drying Time
Ventilation and drying time are also important considerations when applying a wet room membrane on floors and walls. When applying the membrane on floors, it's important to ensure that the room is well-ventilated to allow the membrane to dry properly. Open windows and doors, and use fans to circulate air throughout the room. It's also important to avoid walking on the membrane until it has fully dried, as this can cause damage and compromise the waterproofing integrity.
For walls, ventilation is also important, but it's typically less of an issue than for floors. However, it's still important to ensure that the room is well-ventilated to allow the membrane to dry properly. Additionally, it's important to allow sufficient drying time between coats of membrane, as this will ensure that the membrane adheres properly and provides maximum waterproofing protection.
Maintenance and Care
Once the wet room membrane has been applied and dried, it's important to maintain and care for it properly to ensure its long-term performance. For floors, it's important to avoid using abrasive cleaners or tools, as these can damage the membrane and compromise its waterproofing integrity. Instead, use a mild detergent and warm water to clean the floor, and dry it thoroughly after each use.
For walls, it's important to keep the surface clean and free of any debris or dirt. Use a soft cloth or sponge to wipe down the walls regularly, and avoid using harsh chemicals or abrasive cleaners. Additionally, it's important to check the walls periodically for any signs of damage or wear, and repair any issues as soon as possible to prevent water damage.
Conclusion
In conclusion, applying a wet room membrane on floors and walls requires different techniques, considerations, and membrane selection. By understanding these differences and following best practices, you can ensure that your wet room is waterproof, durable, and aesthetically pleasing. As a wet room membrane supplier, I'm here to help you choose the right membrane for your project and provide you with the support and guidance you need to ensure a successful installation.
If you're interested in learning more about our wet room membranes or would like to discuss your project in more detail, please don't hesitate to contact us. We offer a wide range of PVC Waterproofing and Polymer Waterproofing membranes, as well as Polymer Waterproofing Membrane solutions to meet your specific needs. Our team of experts is available to answer your questions and provide you with the information you need to make an informed decision.
References
- Building Regulations Approved Document H: Drainage and Waste Disposal
- British Standards Institution (BSI) - BS 5250: Code of practice for control of condensation in buildings
- International Residential Code (IRC) - Chapter 3: Water Resistance

