Whether you are building a new home, building a factory or warehouse, or restoring an older building, it needs the floor to be perfectly level – whatever type of final floor surface is going to be installed. So you have a concrete substrate, but where you go from there is a matter of opinion.
For many years now we have had a sand and cement screed laid on the concrete, but it has some serious disadvantages. The material itself – sand and cement – is fairly cheap, but it has to be laid by hand, and that involves a considerable amount of labour. Many buildings today are having underfloor heating installed, which makes very good sense because underfloor heating has many advantages over a radiator system, not the least of which is that it is much cheaper to run.
However, a sand and cement screed laid by hand is never going to completely fill every void and totally envelop the heating pipes, which is what is needed for maximum efficiency of the heating system. Not only that, getting a sand and cement screed perfectly level is very tricky to do.
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