I am having an extension built with the work likely to start bang on in
the middle of winter.
Are there any precautions I need to take or things to check or be wary
about.
I have heard that bricks can't be laid if the temperature drops to a
certain level, is this true? and what is that temparature.

Is the likelihood of damp higher if the building work is done in winter?
Do I need to wait longer for the plaster to dry before I sand down and
start painting? If so how long do I wait and is there any way of
speeding up drying?

Apologies for all the barrage of questions but as you can probably tell,
am a complete novice
when it comes to the building trade, but hoping to start dabbling in DIY
activities with help from people on this board

Thanks
G