Screed drying - Incorrect drying program set

2020-06-26 14:03:57

The heating of the screed after installation takes place with a specified program from the manufacturer of the heating system. Usually 21 days (I know, discussion). So 1 week heating up, one week holding, one week cooling down again. You want to know whether the heating works/is tight and whether the screed is stress-free, otherwise it will "dish".
Surface heating: dry enough so that tiling etc. can be done, is then done with construction dryers. Shock ventilation is always recommended.

However, these heating programs are complete nonsense from an energy perspective. Why should I heat up to 55 degrees when I have an underfloor heating design of a maximum of 35 degrees (which my heat pump probably will never even reach)? I myself have heated up to 40 degrees as a buffer and I was already accused of wasting energy.
And why use the expensive construction dryers for surface heating and not use your own heat pump?

2020-06-26 16:40:08

The high temperatures are needed to relieve the stresses from the screed and to see if there are any cracks. It has nothing to do with normal heating. And heating before laying the floor is done to reduce moisture. The underfloor heating produces heat (which allows the air to hold more water) and the dryer removes water from the air. This can also be achieved by ventilating three times daily with short bursts.

2020-06-26 16:57:41

The high temperatures are necessary to relieve the stresses in the screed and to see if there are any cracks. It has nothing to do with normal heating at all. And heating to readiness for covering is done to reduce moisture. In this process, the underfloor heating generates warmth (which allows the air to absorb more water) and the dryer removes water from the air. But this can also be achieved with 3x daily shock ventilation.

Yes, it does have something to do with each other. If the design is based on 35 degrees, for example, and you perform functional heating slightly above that without cracks and stresses, then everything is fine. What use is it if you detect cracks at 55 degrees, which in practice are never reached because you only go up to a maximum supply temperature of 35?

2020-06-26 18:37:30

You are of course completely right. You can do whatever you want in your private sphere. As a civil engineer, I am of course obliged to write here what corresponds to recognized rules of technology. You are welcome to try something new in your house.

2020-06-26 19:39:15

It's not that new. The civil engineer surely has a private opinion on the topic aside from the "rules," right?

2020-06-27 07:39:58

This is also successfully practiced in real life because certain rules are outdated, although obedient followers still exist, of course. It is a waste of time, energy, and money.

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Screed drying - Incorrect drying program set

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