As with all screeds the performance and finish achieved can be affected by the conditions on site at the time of installation, and for a short period of time afterwards. 

The temperature for supply of screed mortar in very cold conditions is stated within BSEN 8204-7 (pumpable self-smoothing screeds)

 “The temperature of both the base slab and the air in the area where a screed is to be installed should remain in the range of 5°C to 30°C, while the screed is being applied, and subsequently for at least 72h”.

Guidelines for Gyvlon Screed Installation in cold weather

♦  Do not apply Gyvlon screed onto frozen surfaces.

♦  Work should stop at air temperatures of 3°C and falling and can resume again at 2°C and rising.

♦  Ensure the Gyvlon screed is protected from draughts and poured into a watertight location with internal        temperatures above 3°C for at least the next 72hrs.

Gyvlon screeds are calcium sulphate based and therefore setting time will not be retarded significantly in the manner affecting cementitious based materials. Therefore, a slightly lower temperature limit may be applied, however, frost / freezing of the screed must be avoided. 

Note:  Supply of screed mortar below 5°C, will be at the discretion of the screed producer.