Tiling Over Underfloor Heating

Liquid Screed Direct on Tiling Over Underfloor Heating

Here in the UK, more and more households are embracing the benefits of radiant heat, meaning the demand for underfloor heating continues to grow. What gives it the competitive edge? Families with children that suffer from allergies love the dust-free atmosphere, and everyone appreciates the cost-savings created by using lower temperatures to heat your home more effectively.

One of the key ingredients to effective wet underfloor heating, is the use of a great thermal conductor such as liquid screed. If the heat response times are fast, the water running through the pipes can be heated to a lower temperature. The outcome is a home that warms up quickly, provides even heat without cold spots, and costs less to run than traditional radiators.

How Long Does Liquid Screed Take to Dry?

Here at Liquid Screed Direct, we’re proud of be one of the UK’s leading suppliers of liquid screed. This innovative material is being described as a ‘game changer’ by the construction industry. In contrast with dry screed which has to be mixed manually, liquid screed arrives pre-mixed, can be poured on-site by a small team of specialists, and provides a perfect finish every time.

The greatest advantage to liquid screed applications is the speed at which it dries. Whilst dry screed can take up to a week to be dry enough to walk on, liquid screed is normally dry enough for light ambulatory traffic after just 24/48 hours. As a gypsum screed, based on calcium sulphate, liquid screed can be force dried after just 7 days, without causing impactful shrinkage, or effecting strength gain.

Tiling Over Underfloor Heating

Our contractor and developer clients tell us that they’re under terrific pressure to reduce the amount of time it takes for screed to be dry enough to tile over. Liquid screed significantly reduces the drying times, through each of the different phases of preparation:

Phase 1 – the initial drying phase takes around 24/48 hours. During this time windows and doors should be kept closed and no attempt should be made to walk on the screed.

Phase 2 – once the screed is dry enough for light foot traffic, it should be subjected to cross ventilation in order to dry out the flooring.

Phase 3 – force drying liquid screed is possible after around 7 days. This is carried out either by commissioning the underfloor heating system, or bringing in a dehumidifier.

The process from pouring the screed, through to tiling can take just over a month. This may sound like a prolonged wait, but the screed is a flooring foundation. Tiling before the screed has had the opportunity to dry out properly will lead to cracking, curling and structural problems which could be costly to repair.

Preparation for Tiling

Once the flooring foundation is dry, there is normally a thin layer of laitence on the surface which should be dealt with prior to laying tiles. The best method is to sand the floor using a sanding machine employing diamond cutting pads. The final stage before tiling is the sealing of the floor using an appropriate primer.

At Liquid Screed Direct our wet underfloor heating installation specialists will assess the working environment at every stage of the the screeding process. They will make ongoing adjustments and quality checks to ensure the very highest quality of finish prior to tiling. We have absolute trust in the design of our product, the expertise of our installation teams, and the quality of the finish they can produce. That’s why we are able to guarantee excellent results every time!


Why not call us right now, to talk to our liquid screed specialists about your wet underfloor heating installation?


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