5 Things to Consider When Your Customer Asks for a Wet Room

A Practical Guide for Tile Shops & DIY Retailers

Wet rooms are one of the most requested bathroom styles in today’s market. They offer a clean, modern look and are particularly popular in both contemporary homes and accessibility-focused renovations.

However, from a retailer’s perspective, wet rooms also present a challenge. Many customers underestimate the complexity involved and may assume it’s simply a case of choosing tiles and fitting a drain.

In reality, a successful wet room installation depends on correct preparation, compatible products, and proper waterproofing. As a tile shop or DIY retailer, your role is to guide customers through these decisions to help them avoid costly mistakes.

Here are five key considerations to keep in mind.

 

1. Waterproofing Is the Foundation of the Installation

A common misunderstanding is that tiles and grout provide sufficient protection against water. In reality, both are water-resistant at best, not waterproof.

In a wet room, water is expected to sit on and travel across the floor surface, and regularly contact the lower sections of walls. Over time, moisture will pass through grout lines, small voids, or natural movement in the installation.

If there is no waterproof layer beneath:

• Moisture can gradually soak into the substrate, weakening adhesives and causing tiles to loosen
• Timber floors may swell or distort, leading to structural instability
• Plasterboard or unprotected surfaces can deteriorate, particularly in high-use areas
• Damp and mould can develop behind the tiles, often going unnoticed until significant damage has occurred

For this reason, a fully tanked system should always be positioned as a core requirement. Supplying a complete waterproofing solution, such as an AquaTank Tanking Kit, helps ensure customers are not relying on tiles alone to keep water out.

 

2. A Wet Room Is a System — Not a Single Product

Customers often approach wet rooms as a tile-led project, but in practice, it’s a combination of multiple elements working together.

These typically include:

• A waterproofing system to protect the substrate
• A suitable base, such as tile backer boards or prepared screeds
• A drainage solution, often a shower former or linear drain
• Flexible adhesives and grouts designed for wet environments
• Movement joints to accommodate expansion and prevent cracking

Each component plays a role in the overall performance of the installation. If one element is missing or incompatible, it can compromise the entire system.

From a retail perspective, this is an opportunity to shift the conversation from “what tiles do you want?” to “how is the whole wet room being built?”. Recommending compatible systems, including a reliable tanking solution such as AquaTank, helps customers achieve better results and reduces the likelihood of issues later.

3. Substrate Preparation Should Never Be Overlooked

Preparation is one of the most important — and most frequently underestimated — parts of a wet room installation.

Before waterproofing begins, the substrate must be:

• Structurally sound, with no movement or flex that could transfer through to the tiles
• Clean and free from dust, oils, or residues that might affect adhesion
• Flat and level, particularly when large format tiles are being used
• Suitable for wet environments, especially on walls and floors exposed to regular water

For example, standard plasterboard may be acceptable in dry zones but is not always suitable in areas exposed to consistent moisture. In many cases, recommending cement-based backer boards or reinforced substrates will provide a more reliable base.

Waterproofing systems such as AquaTank are designed to bond to a variety of surfaces, but they still rely on proper preparation to perform as intended. Helping customers understand this stage can prevent failures that are often wrongly attributed to tiles or adhesives.

 

4. The Critical Areas Are the Details

The majority of waterproofing failures don’t happen across large flat surfaces — they occur at junctions and transitions.

Key risk areas include:

• Wall-to-floor connections, where movement and water exposure are highest
• Internal and external corners, which are naturally more vulnerable to gaps or weak coverage
• Pipe penetrations, where even small openings can allow moisture through
• Drain connections, which must be sealed correctly to prevent leaks below the surface

These areas require careful attention during installation. Reinforcing tapes, corner pieces, and proper embedding into the waterproof membrane are essential steps, not optional extras.

Systems such as AquaTank are designed to address these details by combining liquid membrane application with reinforcing components, helping create a continuous and secure waterproof barrier across the entire wet room.

 

5. Tile Choice Impacts Waterproofing Performance

 

Modern wet rooms often feature large format tiles or porcelain slabs, chosen for their clean appearance and reduced grout lines.

While visually appealing, these tiles introduce additional considerations:

• Fewer grout joints mean less opportunity for moisture to evaporate, increasing reliance on the waterproof layer beneath
• Larger tiles require flatter, more precise substrates to avoid lipping or voids
• Their size and rigidity place greater stress on adhesives and the layers below

This means the waterproofing system becomes even more critical. It must be continuous, well-bonded, and capable of supporting the installation without weak points.

When customers choose large format tiles, it’s worth reinforcing the importance of using a complete, high-quality tanking system to match the demands of the design.

 

Quantum Group – Specialists in Wholesale Wet Room Products

Wet rooms can deliver excellent results when installed correctly, but they require careful planning and the right combination of products.

For tile shops and DIY retailers, the key is to:

• Encourage a system-based approach
• Highlight the importance of preparation and detailing
• Recommend reliable waterproofing solutions as standard

By guiding customers towards proper preparation, compatible products, and a complete waterproofing approach, you reduce the risk of failures and build long-term trust in your business.

If you’re stocking or recommending wet room solutions, consider including a complete tanking system like the AquaTank Tanking Kit as part of your standard offering. It helps ensure customers have everything they need to create a reliable, waterproof installation.