Multipanel Installation Guide (11mm Laminate Wall Panels)

Multipanel 11mm laminated wall panels are a popular choice for modern bathrooms thanks to their stylish designs, waterproof surface and grout-free finish. They are suitable for a wide range of spaces including bathrooms, en-suites, shower rooms and wet rooms.

This installation guide covers all major 11mm collections including:

• Multipanel Classic Collection
• Multipanel Tile Collection
• Multipanel Pure Collection
• Linda Barker Collection
• Multipanel Contemporary Collection

Whether you are a professional installer or a confident DIY user, this guide will help you understand the correct process to achieve a long-lasting, watertight finish.

Before starting installation, always read the full manufacturer instructions and ensure panels are fitted using approved Multipanel adhesive and sealant to maintain warranty coverage.

Before You Start (Important Preparation)

Proper preparation is key to a successful installation.

Check and inspect all panels

Before fitting, carefully inspect each panel for:

1. Damage or defects
2. Colour and sheen consistency
3. Pattern alignment

Once installation begins, panels are considered accepted in perfect condition.

Acclimatise the panels

Panels and adhesive should be stored in the room for 48–72 hours before installation. Keep them:

1. Flat and horizontal
2. In a dry environment
3. Between 5°C and 25°C

Avoid storing panels upright or in damp conditions.

Tools you will need

1. Tape measure
2. Pencil and ruler
3. Masking tape
4. Silicone sealant & gun
5. High grab adhesive
6. Power drill & screwdriver
7. Jigsaw, handsaw or circular saw
8. Protective gloves and eye protection

Wall Preparation

Multipanel panels can be installed on:

• Tiles
• Plasterboard
• Concrete
• Plywood or chipboard (sound condition only)

The wall must be:

• Clean
• Dry
• Flat and plumb

If walls are uneven, timber battens (grounds) may be required to create a true surface.

Cutting and Handling Panels

Always handle panels with care:

Wear gloves when handling
Wear eye protection when cutting
Cutting method
Use a fine-tooth saw, jigsaw or circular saw
Cut decorative side up (hand saw)
Cut decorative side down (power tools)

This helps prevent chipping and damage to the surface.

Installing Multipanel 11mm Laminate Wall Panels

Step 1: Start with profiles

Begin with an internal corner, end cap or starting profile.

Fix profiles using screws or adhesive
Apply a bead of silicone inside the profile
Ensure a watertight seal before fitting panels

Step 2: Apply adhesive

Apply high grab adhesive to the back of the panel or directly onto the wall.

Press firmly into position, ensuring the panel is:

Level
Plumb
Fully supported

Step 3: Hydrolock® joint installation

Multipanel Hydrolock panels use a tongue and groove system.

Apply a thin bead of silicone (2–3mm) to the tongue edge
Angle the next panel at around 45°
Push into the groove and snap into place
Wipe away any excess silicone immediately

Important: Too much or too little silicone can affect the seal and joint strength.

Step 4: Fixing panels

Panels can be:

• Bonded with adhesive
• Screw fixed through the rear flange

If screw fixing:

• Pre-drill holes
• Fix at 400–600mm centres
• Keep screws flush to avoid interfering with joints

Step 5: Sealing

Correct sealing is essential for warranty protection.

• Seal all vertical joints
• Seal all edges and profiles
• Always silicone seal the bottom edge

You can leave a 3mm gap at the base and seal it, or use a Multipanel seal system.

Step 6: Around windows and openings

Leave a 2mm expansion gap
Seal all edges with silicone
Use appropriate trim or end caps where required

Step 7: Wet room installations

For wet rooms:

• Use a base profile system
• Ensure waterproof continuity behind panels
• Floor coverings should run slightly up the wall behind panels
• After Installation & Care

Once installed, Multipanel requires very little maintenance.

Cleaning advice

• Use warm water and mild detergent
• Wipe with a soft cloth
• Avoid abrasive cleaners or scouring pads

This will help maintain the finish and extend product life.

Warranty Information

Multipanel 11mm wall panels come with a 30-year domestic warranty, covering:

• Cracking
• Blistering
• Delamination
• Loss of waterproof performance

The warranty only applies when:

• Panels are installed correctly
• Approved adhesive and sealant are used
• Panels are properly maintained and sealed

Failure to follow installation instructions may invalidate the warranty.

Final Summary

Multipanel wall panels are designed to be quick to install, long-lasting and fully waterproof when fitted correctly. By following the correct preparation, installation and sealing methods, you’ll achieve a clean, modern bathroom finish that lasts for years.

Frequently Asked Questions (FAQs)