Cluster info · Buy new-build
Dehumidifier in a new build: useful or not?
A new build contains a lot of residual water (concrete, screeds, plasters). Drying takes several months.
1. Why so much moisture
Concrete, screeds and plasters release their water for 6 to 18 months. See moisture defects.
2. Dehumidifier: temporarily useful
It speeds drying but does not replace good ventilation.
3. The structural solution: dual-flow ventilation
See new build Liège for local practices.
Questions about moisture in new builds
How long does a new build take to dry?
Plan 6 to 18 months depending on materials and the weather-tight season. Residual moisture drops progressively.
Should we heat during drying?
Yes, gentle and constant heating speeds evaporation and limits condensation on cold walls.