Floor Levelling

Bathroom Floor Levelling Cardiff

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Floor Levelling


From our perspective as well as yours having a level, flat bathroom floor is important from an underfloor heating and floor tiling perspective.

Firstly you want your heating to be even around the room but also you want to ensure that no damage to the floor is likely to occur due to poor floor preparation. Having a level floor from a flatness perspective minimises the likelihood of tiles or grout cracking. With a flat floor the tile has nowhere to move to and therefore the only possible way a tile would break would be an accident where a large heavy or sharp object was dropped onto the floor. When considering a slope in the floor, whilst underfloor heating helps evaporate water from the floor you don't want a situation where any build up of water runs towards a wall, away from the tanked shower area and provide a risk for water seepage.

For larger bathrooms where freestanding bathroom units are to be used a level floor will mean you unit will not have an annoying rock to it awaiting some peice of cardboard to be shoved under a leg to stabilise the unit!

Bathroom Floor Levelling Contractors

If you are looking for bathroom floor levelling contractors around Cardiff, contact us today to arrange a quote

Levelling a Floor in Cardiff


When installing a wet room as mentioned having a level floor is important for the bathroom. The only are which is an exception to this rule is under the shower itself. The floor needs to be set to have a deliberate slope so that water from the shower flows towards the drainage hole. When installing a traditional wet room the floor under the shower will be a seamless continuation of the floor tiles used in the rest of the room.  To achieve the slope to the waste pipe a wet room tray is used to create a designed slope toward to the waste hole.

Wet room trays themselves are also provide an additional protective water layer. These trays come in various sizes and designs. The design focusses on the position and size of the drainage hole and the form of the tray will naturally slope to wherever the drainage hole is positioned. Typically the drainage will be shaped as either a square grate which will be positioned underneath near to where you are most likely to stand under the shower head, or it will be set so that when the tray, if fitted, will form a longer narrower water run away which will be nearer to the wall where the shower itself is. The latter is becoming more popular as this minimises standing on the waste grid itself.

The wet room shower tray provide the angles for the tiles to follow and therefor cuts are made to floor tiles to allow them to follow the shape and slope of the wet room tray. These will be subtle yet ensure that all the water from the shower flows away towards the waste water pipe.

Floor Screeding Cardiff


There are a few options we have when floor levelling however, in the vast majority of cases the actually levelling aspect will be achieve used a certain type of screed. If there is deflection in your floor we will strengthen it with additional support and ply boards. Waterproof membranes and insulation board then provide a base on which to lay screed which is primarily a mixture of sand and cement but different screed contain additional bonding agents and other substances which will favour one type of screed over another depending on the existing floor status and what will be fitted on top. Our team will asses the situation and decide on the most suitable screen as part of our total install service.

Screeding is a great way of levelling and works extremely well with when laying underfloor heating providing an excellent base on which to then lay tiles. A nice flat surface means tiles can be laid perfectly level and you will have a professional floor tile finish. In fact it provides a great foundation for luxury vinyl tiles (LVT) and laminates too.

Need help?

Frequently Asked Floor Levelling Questions

  • What is the best way of levelling a floor?

    The best way of levelling a bathroom floor will depend on the extent of the unevenness and the type of existing flooring you have. Here are a few options to consider. The options we could use are:


    1. Self-leveling compound: This is a liquid mixture that can be poured over the floor unevenness to create a level and smooth surface. Self-levelling compound is easy to apply and can be used to correct minor and significant floor drops. This compound is self-levelling, meaning it will fill in low spots and create an even surface.

    2. Sand-cement screed: This is a traditional method that involves mixing sand, cement, and water to create a mortar. The mixture is then spread using a trowel over the floor unevenness. This takes more time and skill than using a self-levelling compound to provide a durable and long-lasting result. It is probably excessive for a residential bathroom but may be more suitable in a commercial environment such as swimming pools and Spas.

    3. Plywood subfloor: If the unevenness is due to minor dips and bumps, adding a plywood subfloor may be an option. The plywood can be cut and laid on top of the existing floor to create a level surface that can support the bathroom flooring of your choice.

  • Why choose J&Z Bathroom Fiiters Cardiff to level our bathroom floor?

    We have a wealth of experience levelling floors in bathrooms - especially for a wetroom and for underfloor heating. As we can provide a complete service, choosing us to level the floor so that we can install underfloor heating and tile makes absolute sense compared to jumping from one contractor to another, so why choose anyone else?

  • Is liquid screed self levelling?

    Yes, liquid floor screed can level itself to a large extent, thanks to its self-levelling properties. Liquid screed is a cement-based solution that can be poured onto a concrete or new underfloor heating system and can spread in a smooth and level manner across the surface. This type of screed is designed to be pumped and levelled out using advanced techniques and equipment to create a uniform surface free of bumps, dips, and other irregularities.

    Once the liquid screed has been poured, it will naturally seek a level surface due to its low viscosity and fluidity. Liquid floor screed can be accurately measured and piped into where needed using a specialist pump. The depth of the screed can also be varied for different areas and thicknesses, adding to its self-levelling capabilities.

    However, it is important to note that liquid screed may not be suitable for all floor types, conditions, or applications. Certain types of floors may require additional priming or preparation to ensure the screed will adhere to the surface. Moreover, any unevenness or bumps in the underlying substrate may affect how well the screed self-levels and could cause localized weaknesses or depressions.

    Overall, liquid floor screed can offer an efficient and cost-effective solution for levelling floors. With its self-levelling properties and advanced application methods, it can help to make the floor installation process quicker and easier, with fewer imperfections.

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