Wetwall panels have become a go-to choice for UK homeowners looking for a low-maintenance, stylish, and waterproof alternative to tiles. Designed to create a seamless and watertight surface, Wetwall is perfect for bathrooms, en-suites, and wet rooms. But even though Wetwall is designed to resist moisture, proper installation and waterproofing techniques are essential to ensure long-lasting performance.
So, how do you waterproof a Wetwall? In this guide, we’ll walk you through the process—from panel selection and sealing methods to fitting tips and ongoing care—to ensure your Wetwall bathroom stands the test of time.
What Is Wetwall?
Wetwall is a type of waterproof wall panelling made specifically for high-moisture environments. Unlike traditional ceramic tiles, Wetwall panels don’t require grout and offer a smooth, non-porous surface that’s easier to clean and more resistant to mould.
Panels are commonly made from:
- High-Pressure Laminate (HPL)
- PVC (Polyvinyl Chloride)
- MDF or plywood core with a decorative waterproof finish
These materials are joined using trims and sealed edges to form a protective barrier around your bath or shower area.
But here’s the important part: the panels themselves are waterproof, but the joints and corners need to be properly sealed to make the entire installation water-tight.
Do Wetwall Panels Need Additional Waterproofing?
Yes—the panels alone are water-resistant, but the full system requires careful waterproofing at all joints, seams, and fixtures. Any gaps or poorly sealed corners can allow water to get behind the panels, potentially leading to mould, rot, or costly repairs.
So, even though Wetwall is marketed as a waterproof solution, installation quality is key to its performance.
Step-by-Step: How to Waterproof a Wetwall Installation
If you’re installing Wetwall in a new bathroom or upgrading your existing walls, follow these key steps to ensure proper waterproofing:
1. Prepare the Subsurface
Start by making sure the surface you’re applying panels to is:
- Flat and level
- Dry and dust-free
- Free from mould or previous water damage
Important: Never install Wetwall over surfaces that are damp or damaged. Always repair and dry out any issues first.
2. Use the Correct Adhesive
Apply a high-grab, waterproof adhesive to the back of each panel. Suitable UK adhesives include:
- Wetwall Hi-Tack Adhesive
- Multipanel High Grab Adhesive
- UniBond Waterproof Grab Adhesive
Follow the recommended pattern (usually vertical beads or zigzags) to ensure full coverage and strong adhesion.
3. Seal All Joints and Edges
This is where waterproofing really matters. You need to:
- Apply silicone sealant to every joint, corner, and base where the panel meets another surface (e.g., floor, ceiling, bath edge).
- Use proper trims—such as corner profiles, end caps, and joint trims—to hide and seal connections.
- Ensure the sealant is smooth, continuous, and 100% mould-resistant.
Tip: Always use a high-quality sanitary-grade silicone in a colour that matches your panel or trim.
4. Pay Attention to the Base of the Panel
Water tends to collect at the bottom of the shower or bath area. To waterproof this zone:
- Run a thick bead of silicone along the edge where the panel meets the tray or bath lip.
- Push the panel firmly into place so the adhesive and sealant bond tightly.
- Apply additional silicone to the outer edge once fixed.
5. Use Mechanical Fixings if Needed
For heavier panels or uneven surfaces, consider securing the panels with stainless steel screws. Ensure screw heads are capped and sealed to maintain waterproof integrity.
6. Allow Everything to Cure
Let the adhesive and silicone cure fully (usually 24 hours) before using the shower or exposing the panels to water.
Waterproofing Problem Areas to Watch
Even a high-quality installation can fail if key areas aren’t properly sealed. Pay close attention to:
Shower Corners
Always use corner trims and ensure there’s a bead of silicone running behind and along each edge.
Bath Edges
Silicone should form a complete, flexible barrier where the panel meets the top of the bath.
Shower Trays
If your tray moves slightly, you’ll need a flexible sealant that can withstand that movement without cracking.
Pipe Cut-Outs and Fixtures
When drilling or cutting holes for plumbing, always seal around the pipe with silicone to prevent water ingress behind the panel.
Can Wetwall Be Used in a Wet Room?
Yes—but only when installed correctly. Wetwall panels can be used in wet rooms as long as:
- All joints are sealed
- The substrate is waterproof (use tanking kits or waterproof backer boards)
- Floor and wall transitions are sealed properly
For wet rooms, professional installation is highly recommended due to the complexity of waterproofing at floor levels.
Maintaining Waterproof Performance Over Time
Even the best installations need some ongoing care. Here’s how to maintain a waterproof Wetwall setup:
- Inspect silicone seals regularly—especially in high-moisture areas
- Re-seal joints if you notice gaps, cracks, or mould
- Clean panels with non-abrasive cleaners to avoid damaging the finish or trim
- Avoid hanging heavy items directly from panels without proper supports
FAQs About Waterproofing Wetwall
Is Wetwall more waterproof than tiles?
Yes, in most cases. Wetwall panels have no grout lines, which are often the weakest point in tiled bathrooms.
Can I waterproof Wetwall myself?
Yes, if you follow all proper steps and use the correct materials. However, professional installation is recommended for wet rooms or large shower enclosures.
How long does silicone last?
Silicone sealant typically lasts 3–5 years. However, this depends on use, cleaning methods, and ventilation.
Can I install Wetwall over existing tiles?
Yes, as long as the tiles are clean, level, and securely bonded. Use a strong adhesive and seal all edges.
Final Thoughts
Wetwall panels offer a stylish and highly practical solution for UK bathrooms, but their long-term waterproof performance depends entirely on proper installation and sealing. With careful preparation, high-quality adhesive, and attention to sealing joints and edges, you can create a fully waterproof Wetwall system that lasts for years with minimal upkeep.
Ready to Waterproof Your Bathroom? Let Annick Bathrooms Help
At Annick Bathrooms, we supply and install high-quality Wetwall panels with expert precision. Whether you’re planning a full bathroom renovation or simply want to upgrade your shower space, we can ensure your Wetwall system is fitted for both style and long-term performance.
Get in touch today at 01294 683375 for advice, quotes, or to view our full range of waterproof bathroom wall panels.
