Strip foundations in winter

[moldy]

Where I live from now till March temperatures can drop below zero at night. Can foundations be laid during this time? What steps do I need to take to ensure end result? Or should I wait till spring? 

[Declan52]

You can add rapid hardener to your mix so the motar goes off but it is only good for temperatures around zero to -4. If it's going to drop to -10 overnight then you shouldn't really be building. Plus your talking near enough 1L of additive per bag of cement so it won't be cheap.

[Russell griffiths]

Nothing needed, if it’s a strip trench it will be protected by the soil surrounding it, if a frost is coming a roll of hessian over the trench over night. 

 

If you are talking about a finished floor slab then that is different.