Liquid screed is designed to last the entire lifetime of the building. Because it is highly durable and resistant to the curling and shrinking often seen in traditional sand and cement, it provides a permanent, stable foundation. Once cured and properly maintained, it will not degrade, ensuring your floor remains flat and structurally sound for decades.

Yes, you can screed over an existing layer, but it requires careful preparation. The old surface must be structurally sound, free of dust, and properly primed to ensure a strong bond. In many cases, we recommend an "unbonded" approach using a plastic membrane between the layers to prevent any cracks in the old floor from transferring to the new surface.

A bonded screed is applied directly to the concrete substrate using a bonding agent or primer, making the two layers act as one. An unbonded screed is separated from the main concrete structural floor by a damp-proof membrane (DPM) or polythene sheet. Bonded is best for thin layers where height is limited, while unbonded is ideal for preventing moisture issues and structural movement.

Premium anhydrite screed like Gypsol has minimal shrinkage and virtually zero risk of cracking or curling when installed correctly, which is why we guarantee it.

Unbonded screed is highly effective at preventing "reflective cracking," as it isn't affected by the settling or movement of the base concrete. It also provides an excellent moisture barrier, protecting your final floor finish from rising damp. This method is often quicker to prepare and is the preferred choice for modern timber-frame builds or when installing high-performance insulation.