Liquid Screed After Care
At RB Liquid Screed we’re immensely proud of the benefits our product provides for clients across the UK. Contractors, developers, refurbishers and self-build enthusiasts tell us that liquid screed is revolutionising flooring. Our clients tell us that self-levelling screed speeds up the application process, provides a great finish every time, and offers highly effective thermal conductivity in underfloor heating installations.
The Importance of Liquid Screed Specialists
However great the product, we can’t underestimate the importance of the role played by our specialist screed teams who manage the onsite pour. These are highly skilled screed experts who are able to manage both the environment and the pour for the very best outcome. Their input is so crucial that we give our clients direct access to them throughout the planning and installation phase.
The Aftercare Phase
“What happens after the pour?” is a question our screed experts get asked a good deal. Installation is just the first phase; then comes the period in which the liquid screed hardens, dries and settles before the floor finish is applied. We thought it might be useful to outline the aftercare process, post pour and pre-finishing.
- Curing – the liquid screed pour is complete and the specialist screed team has left. Now the screed needs to cure for 24 to 48 hours. This requires a sealed environment in which the temperature sits constantly between 5℃-30℃. The newly laid screed should not be exposed to any draughts or sunlight.
- Drying – after 24/48 hours the liquid screed floor should be dry enough for light foot traffic. Windows and doors should be opened to allow for environmental cross ventilation and air circulation. Dependent on atmospheric conditions a typical 50mm screed will dry to a moisture level of 2.5% in approximately 15-21 days.
- Force Drying – dehumidifiers can be used to speed up the drying process but a closed system should be used to ensure that extracted moisture is removed. Where liquid screed has been used as part of a wet underfloor heating system, a commissioning process can begin 7 days after installation.
- Commissioning Underfloor Heating – the flow temperature should be set to 20-25℃ for 24 hours. The temperature should then be increased by 5℃ increments until the maximum temperature is achieved. This should be maintained for 7 days. The temperature should then be decreased in 5℃ increments. The system should be turned off for 48 hours prior to testing the moisture of the screed.
- Moisture Testing – whilst approximate drying times can be predicted, much depends on the atmospheric conditions in which it is laid. After recommended drying times have been observed, it is necessary therefore, use a hygrometer to check for moisture. The results should be below 75% RH (0.5% moisture) before any flooring finish is applied.
- Floor Finish – Cemfloor® Flowable Liquid Screed does not require sanding, or priming prior to applying the flooring finish as it doesn’t create laitance. Anhydrite liquid screed does create laitance and therefore needs to be sanded and primed for best results.
Any Questions? Just Call RB Liquid Screed
Sometimes picking up the phone and talking is the best way to answer any queries you might have. That’s why we give all our clients direct access to our regional teams of experts who eat, live and breathe liquid screed. Contractors using liquid screed tell us they receive clear, accurate information using this process, and that it’s great to be able to talk through prep or aftercare processes in detail.
If you have queries about any aspect of your liquid screed installation, call our screed experts direct on 01842 659498 / 07498 964984