Liquid screed, also known as flowing screed, calcium sulphate screed or anhydrate screed, is the modern alternative to conventional Sand and Cement screed. It is designed to provide a smooth level surface in both commercial and domestic buildings prior to application of floor finishes and is fast becoming the popular choice for use with underfloor heating.
There are many advantages of using Liquid Screed over conventional sand and cement screed. Due to its greater strength it can be laid at a lesser thickness than Sand & Cement, which means less cover over pipe work, thus making your underfloor heating far more efficient and with twice the thermal conductivity of a sand & cement screed, it gives your heating a faster reaction time, saving you up to 10% on running costs.
Also when using Liquid Screed over underfloor heating that is powered by a ground or air source heat pump, the output temperature can be reduced due to the floors greater thermal properties, and so for every 1 degree a heat pump runs lower, a 3% efficiency will be gained , saving you money and reducing your carbon footprint! This graph details the improvement in heating performance that can be achieved when using Liquid Screed over the conventional Sand Cement Screed. It can cover large spaces in a short period of time and shallower floor depths can be achieved without a need for reinforcement