WIDTHS
In order to guarantee the cladding lasts, the thickness of the screed must be determined based on the expected loads, the type of subfloor, the future use of the floor and the construction of the screed.
The minimum thickness for unbonded screeds is 4 cm, unless otherwise specified by the manufacturer.
For floating screeds it is 4 cm for domestic use and 6 cm for commercial use.
For screeds with heating or cooling, in addition to the requirements for floating screeds, a minimum thickness of of at least 3 cm above the heating or cooling section is required under UNI EN 1264.
This is particularly important in the case of thin screeds (<4 cm).
Where it is not possible to comply with the minimum thicknesses required by good practice, it may be worth varying the type of screed.
At the design stage, it is best to avoid sudden changes in thickness.
The thickness above the pipes must be at least 3 cm. In order to reinforce this small section of screed and to keep the risk of cracks to a minimum, sufficient reinforcement must be added to the middle of the screed.
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