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[ DIN 18560 "Screeds in construction" ]

Screed standards and tolerances

The work of a professional screed layer is based on accuracy and specialist knowledge - it is not for nothing that all statutory regulations must be observed. In today's article we deal with the screed standards and tolerances and the meaning behind the legal regulations.

DIN18202 - That's what it says

This rule deals with the height differences that two arbitrarily chosen points in a certain distance can have. This value is called "flatness tolerance" and is explained in more detail in DIN 18202. The following values ​​result from table number 3 line 3:










Ready-to-use floors (e.g. screeds, industrial floors, bonded screeds, etc.)

2 mm

3 mm

4 mm

5 mm

6 mm

7 mm

The table created above is only an excerpt from DIN 18202, which, however, refers to the evenness tolerance when laying the screed (finished floors). The top line shows the distance between two reference points in meters. The highest possible tolerance for the respective distance is in millimeters in the line below.

Example: Before we start laying the arch covering, a visual inspection and, if necessary, a random check of the evenness tolerance is carried out. Two points are selected at a distance of one meter. The height difference at this distance may not exceed 4 mm.

Conclusion: Screed should always be laid by a specialist company

In order to prevent nasty surprises, standards and tolerances should be observed when laying screed. This is difficult for laypeople, since the necessary equipment is usually not available. However, since the professional laying of screed has a direct impact on the comfort and functionality of your floor, this work should be carried out by a specialist company.

Of course, we offer you all work related to the laying of screed in private and commercial buildings. We also advise you on the right materials and can serve all your wishes in this regard. Whether a renovation is pending or a new building project is planned, whether it is conventional screed or a variant with integrated floor heating - we support you with your building project!

Get a quote now from a qualified screed installer

Our screed layers offer high-quality screed work as part of professional screed laying.

[ FAQs ]

Frequently Asked Questions

What is the flatness tolerance for?

The flatness tolerance can be used to determine the height difference between two points. Depending on the distance between the two points, this must not exceed certain values ​​(see table). Adherence to this evenness tolerance is important, because on the one hand the building owner can complain if it is exceeded and on the other hand increased values ​​could have negative effects on the floor covering. Failure to observe these values ​​can result in dents, waves or even cracks in the final floor covering, which are not only visually disturbing but also limit their use.

info: There are also floors and sub-floors where an incline in the screed makes sense and is desirable. For example, showers are built with a slope in the direction of the drain to allow the waste water to drain away.  

What residual moisture may the screed have before laying a floor coating?

In addition to the evenness tolerance, the readiness for covering of the screed must also be checked before a floor covering can be laid. The screed may only have certain moisture values ​​in order to function as a stable basis for the floor covering. This residual moisture is given as a percentage and depends on the screed used. In common cement screed it is a maximum of 1,8%. The type of screed and the individual manufacturer's specifications are primarily important for the correct determination.

We at "Wirverlegenestrich" naturally comply with all legal requirements and standards and pay close attention to compliance with them. If you have any questions about laying screed, you are welcome to contact us - we are happy to help with words and deeds!

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