When you are undertaking any sort of building contract, whether it is a new build or restoration work, when you lay a new concrete floor it will need screeding. For many years, sand and cement has been the traditional sort of screed that has been used, but it has many disadvantages.
Not the least of these is that it takes a lot of man hours to do it because the whole thing is carried out by manual labour. First, you have to mix the sand and cement in a cement mixer. Then it has to be transported in a barrow to the floor area and tipped out, and then it has to be spread across the concrete surface manually using hand tools. Meanwhile, more sand and cement is being mixed in the mixer. If you have a large area of flooring to cover, the whole process can take forever. Well, perhaps not forever, but nonetheless a very long time.
Fair enough, some sand and cement mixes are now being delivered to site ready mixed, especially for larger areas, but even so the process is very long-winded.
Hence the development of liquid screed, which is also delivered to site ready mixed, but is then poured on to the concrete substrate using a pump. The whole process is amazingly quick compared with sand and cement: at Liquid Screed we have laid 100 square metres in 45 minutes and have been known to cover up to 2,000 square metres in a single day. Compare that with doing it by hand!
Not only that, liquid floor screeding in London has so many advantages over sand and cement, especially when you are laying underfloor heating. It totally covers the heating pipes without leaving any gaps, so that the heat is spread evenly in the room above. Furthermore, a liquid screed has almost double the heat transference capabilities of sand and cement, so it requires less energy to produce the same level of heat in the room. This means that there is an ongoing benefit to the environment and also to the occupier who will spend less on heating.
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