ᐅ Hairline Cracks in the Screed After One Day

Hello,

The day before yesterday, on August 24, 2017, I had my CA screed installed.
It has a thickness of 6 cm (2.4 inches) with 16 mm (0.6 inches) underfloor heating which is still turned off. Below that is a 30 cm (12 inches) XPS insulation layer, then the slab. Part of the house has a basement. The house is an older building.

Yesterday, I checked again and noticed that cracks have formed everywhere. Are these normal at the beginning?

Hello, such cracks are not normal!
Did the screed get exposed to too much draft?

Please contact the screed installer to determine the cause.

Best regards

No, there is no ventilation.
Yes, I will do that tomorrow.

From conversations, I gathered that the mixing plant has introduced a new screed mixture.