ᐅ Construction dehumidifiers – a must-have?

Created on: 3 Jan 2012 22:04
S
steffi23
Hello,
we are currently building as well. In the next few weeks, the screed will be installed.
Our builder now wants to place three construction dryers in the house for two months afterwards. However, we would prefer to avoid this and get rid of the moisture by ventilating. The builder advises against this.
Can anyone give us advice on whether construction dryers are really necessary or if it is possible to manage the moisture without them?

Thank you in advance for your opinions.
Best regards,
steffi23
Jaydee20 Nov 2013 09:39
We are facing the same problem. Our screed is now 6 days old, and we ventilate daily as usual. We are currently waiting for the electricity connection for our underfloor heating so that we can run the screed drying program at the earliest in 1 week.
C
Christian AHS
20 Nov 2013 13:26
So, after consulting with the site manager, we will ventilate 1-2 times daily by opening windows fully for 10 minutes.

At the end of next week, beginning of calendar week 49, the central heating installation (no underfloor heating) will take place, and then heating can be started – this should make things easier.

The site manager thinks we won’t need a building dryer (but I’ll keep that in mind).

Regards,
Chris
Der Da20 Nov 2013 14:43
We had our house assembled in early December last year, without underfloor heating.
After pouring the anhydrite screed, the heating was turned on and heated to about 30°C (86°F). A window was left slightly open, and there was an exhaust fan installed upstairs.
During this time, there was usually someone working inside the house, which limited the airing out to only about three weeks.
After eight weeks, the residual moisture in the screed measured by CM measurement was 0.2%, which is almost ready for covering.

In total, around €600 of gas was used for the heating.
Jaydee20 Nov 2013 18:59
8 weeks???!!!!

Oh no. If it takes that long, we really might have a problem with our move ...
Y
ypg
20 Nov 2013 19:04
For each cm (0.4 inch) of cement screed, one week is recommended – this is said to apply under optimal conditions.

This morning, the moisture level in the house was 92%, after airing on a sunny day it dropped to 67%.

I wish you all good luck
Jaydee20 Nov 2013 19:22
We have an anhydrite screed on site. It apparently dries faster.