Water Proofing Showers

Why Tanking Shower & Bath Areas Is Important

A wet area is any bathroom, wet-room, shower area or steam room, or any other location subject to frequent water contact.
So what is tanking?  Put simply tanking is a waterproof membrane.  Tanking systems are used in wet areas before the tiles are fitted.  The tanking systems can either be liquid based in which case they are painted or rollered on, or sheet membranes which are much like wallpaper and also tile backer boards The idea of the system is that once it has been fitted, the area is completely watertight.  The background surface (such as plasterboard) cannot be damaged by water.

Over time, water is absorbed through the grout joints and adhesive bed and then into underlying substrates
If the substrate is not protected, it can cause damp and mould issues; and as time progresses, this can even transfer to adjoining rooms and/or cause the tiles to de-bond!

Ultimately, you’re left with an unsightly and costly situation to fix.
It is a common misconception that cementitious adhesives and grouts are Waterproof.
Most are only water resistant, meaning they do not prevent the passage of water, but instead allow water to pass through without being affected.
By not following the British Standards guidance, the consequences can be costly.
Fortunately, tanking a wet area doesn’t have to add much extra time, effort or excessive cost to your refurbishment

Tanking is a necessary part of fitting a shower or bath area correctly and if it hasn’t been suggested to you then really you should be asking why not?

There are 3 main systems for Tanking bathrooms ,showers,wet rooms

Usually Three Layers Waterproofing And Damp-Proofing Membrane Consisting Of PP/PE/PP Layers That Protects Floor And Wall Substrates From Water Penetration And Moisture Passage In Wet Areas

Membrane Roll
Membrane Roll

Liquid Membranes is the ideal ready-to-use waterproofing compound. It provides a permanently flexible watertight membrane on floors and walls prior to tiling in shower areas, wet rooms and wet zones,


Usually made from an extruded polystyrene foam construction boards are water-repellent and easy to work with. Finished on both sides with a special coating, they are ready to be tiled, rendered or plastered.