Cold weather placement
Minimum temperature of 5°C at the point of discharge
The European standard for concrete EN 206, and its complimentary British Standard BS 8500, requires that concrete must be supplied at a minimum temperature of 5°C at the point of discharge and this temperature must be maintained on site using insulation.
This means you need to ensure adequate insulation material is available and have extra labour on hand to place, finish and insulate as quickly as possible. Newly placed concrete which is allowed to cool to freezing point or below will be permanently damaged and unfit for purpose, so one of a number of methods should be used to protect it. These can include straw blankets with tarpaulins, space heaters and layers of hessian.