Should I Remove the Laitance?
Laitance is one of anhydrite screed layers that remain on the floor surface during the floor drying process. It has a characteristic powdery and weak surface- with some slight shimmers.
Some clients prefer leaving their laitance behind- which is not a good idea. The more the laitance dries, the harder it becomes to remove. If you remove it after ten days or more, the laitance will reveal coarse screed underneath that makes your floor unleveled.
Removing the laitance also speeds the drying process. In some floors, actual drying starts after removal of the laitance. Anhydrite screeds also dry differently than sand/cement screeds. The screed dries out by letting moisture out of the slabs, which is impossible when the laitance is present.
Where to Use the Anhydrite Screeds?
Anhydrite screeds are suitable for both existing buildings undergoing renovations and new ones. They are self-levelling and provided the installer removes laitance, it will last longer.
For smoother floors, one can go for the anhydrite flowing screeds that have a smooth level finishing.
If you have any questions on anhydrite screeds or any other queries don’t hesitate to contact us and a member of our technical team will be happy to help you further.
