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  Steve London Stone September 23, 2012 at 10:59am

  You can put things into your mortar to accelerate the going off process.  I have used them in the past but have always found them hit and miss to be honest

  I have never heard of people using heavy duty marquees and heaters, it could get quite expensive with results not going to be guaranteed.  Mots people I know will just avoid laying paving when the temperature get too low.  
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  Charles Langford September 23, 2012 at 11:02am

  Hi there, thanks for your answer. We use frostproofer in our mixes and cover everything with tarps and hessian but as far as I am concerend it is still risky. I have ten guys on the payroll so can't really avoid paving / brick work / rendering for a large portion of the year.
   
  London Stone said:

  You can put things into your mortar to accelerate the going off process.  I have used them in the past but have always found them hit and miss to be honest

  I have never heard of people using heavy duty marquees and heaters, it could get quite expensive with results not going to be guaranteed.  Mots people I know will just avoid laying paving when the temperature get too low.  
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  Steve London Stone September 23, 2012 at 11:14am

  Its a difficult situation Charles, especially when you've got guys to pay.  the winters do seem to have been particuarly harsh over the past couple of years as well.  Dont think there are any sure fire methods
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  Thermo September 23, 2012 at 5:59pm

  trouble is even if you take measures like that, you still end up with the sand being delivered thats been outside and then youre scuppered! You cant realistically keep the blowers going all night long either
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  Gareth Wilson September 23, 2012 at 6:41pm

  The brush in products rompox are good but still you have to use above 3degrees but they are expensive in my view. We tried last year using polythene tents on a timber framework and putting in a fan heater. We used extra rapid ( which doesn't go off any faster than any other cement under 10 degrees) then put the heater in and it went off quickly and we didn't have any problems but we didn't have many deep frosts last year as it was mild. We only point between 11.00 and 2.00 when the day should be at its warmest and should be 3 degrees and rising.
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  Gareth Wilson September 23, 2012 at 7:20pm

  Sorry I forgot also use silica sand don't ask me why but it seems to work.