Laying blocks in cold weather

[LSB]

We've always been told that the temp must be 3 degrees and rising to mix mortar and lay blocks.

But, the question is, how long does it need to stay over 3 degrees.

 

At the moment it's warm in the day, say 10 degrees, but getting colder in the evenings, so if they are laid in the morning when it's warm enough, but we know it's going to be cold later, is that a problem.

 

TIA

[Conor]

Cover in Hessian if any concerns. £50 for a roll that will cover more than a squad could lay in a day.

[LSB]

26 minutes ago, Conor said:

Cover in Hessian if any concerns. £50 for a roll that will cover more than a squad could lay in a day.

already done that as we have some hessian from horse feed, just wondered if there was a recommended temperature as it fell to  -2 last week after some blocks had been laid on a warm morning.