Pay special attention to water tanks and pipes in unheated areas like loft spaces and garages, and check insulation in any property likely to be unoccupied for long periods. Fix dripping taps – even a small trickle can result in a frozen pipe.
Lag pipes in exposed or draughty places.
Leave the heating on to keep pipes from freezing. Keeping the heating on means that water in pipes will remain at a constant temperature and should not get cold enough to freeze.