ᐅ Which type of screed is suitable for my new build?

Created on: 16 Apr 2020 10:41
T
tumaa
Hello everyone,

I had originally planned to use cement screed, but my tiler told me: with liquid screed, you don’t need movement joints for the tiles, and for the parquet flooring, you don’t need leveling compound.

Ground floor: tiles
Upper floor: parquet, main bathroom with tiles

My screed installer offers both options.

Should I still stick with cement screed?

I would like to hear your opinions on this.
T
tumaa
16 Apr 2020 10:58
The parquet flooring will be glued down...

By "flowing screed," I mean anhydrite screed... so is calcium sulfate screed something different?
Tolentino16 Apr 2020 11:02
tumaa schrieb:

Anhydrite screed.....then calcium sulfate screed is something different
According to widely available general knowledge encyclopedias, they are considered synonymous.

It also states that anhydrite screed is especially suitable for underfloor heating...
andimann16 Apr 2020 11:44
Hello,

We have parquet flooring and cement screed and didn’t need any leveling compound. The screed installer just has to put in some effort.
What about expansion joints with the tiles? How large are your rooms?

More importantly: anhydrite screed is very sensitive to moisture. We had a severe water damage in our house due to a burst pipe. Luckily, we had cement screed, which you can dry out again. With anhydrite screed, we would have had to remove the screed from the entire upper floor. In other words, the house would have been completely uninhabitable for months.

After this experience, I would never choose anything other than cement screed...

Best regards,

Andreas
T
tumaa
16 Apr 2020 11:57
andimann schrieb:

Hello,

We have parquet flooring and a cement screed and didn’t need any leveling compound. The screed installer just needs to do a proper job.
And expansion joints for the tiles? How large are your rooms?

Much more important is this: Anhydrite screed is very sensitive to moisture. We had a severe water damage in the house due to a burst pipe. Fortunately, it was cement screed, which can dry out again. With anhydrite screed, we would have had to remove the screed from the entire upper floor. In other words, the house would have been uninhabitable for months.

Based on that experience, I would never choose anything other than cement screed...

Best regards,
Andreas

My living, dining, and kitchen area is about 65 sq m (700 sq ft).

The screed installer just told me that with cement screed, the floor must be prepared if parquet is to be glued down.

A combination of cement and anhydrite screed, that is, in different rooms, would cost about €500 more overall.
Tolentino16 Apr 2020 12:16
tumaa schrieb:

The screed installer just told me that for cement screed, the floor needs to be treated if you want to glue down parquet flooring.

This is also mentioned in the article on the knowledge page regarding anhydrite screed, as it is very absorbent. Although I didn’t fully understand that part. Check under "Building Technology and Processing Instructions."
tumaa schrieb:

A combination of cement and anhydrite screed, meaning in different rooms, would cost about 500€ more overall.

Compared to only cement screed?
T
tumaa
16 Apr 2020 12:17
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Tolentino schrieb:

Just cement screed on the other side?

Well, if I want both.