Preventing burst pipes in winter

In winter, pipes in unheated basements, attics, garages and beside exterior walls are especially exposed. Freezing water can damage a pipe, and the leak may only become visible as it thaws. Start preparing before the first severe cold spell.

Why do pipes burst?

Water expands as it freezes. Ice can block the flow and place stress on the installation. Insulation slows heat loss, but alone cannot guarantee protection during prolonged freezing conditions.

Five preparation steps

Insulate exposed pipes. Choose insulation suitable for the pipes and their surroundings. Pay particular attention to joints and wall penetrations.
Maintain suitable heating. During an absence, use frost protection according to the system instructions. The temperature required depends on the building and pipe locations.
Prepare outdoor taps. Disconnect hoses. If there is a separate shut-off valve, close it and drain the section designed for draining.
Allow warm air to circulate. In cold areas, open the cabinet beneath the sink if needed, keeping cleaning products safely out of children's reach.
Have vulnerable areas inspected. Pipes that have frozen before need a lasting solution. Leaving a tap dripping is no substitute for proper protection.

If water stops flowing

Check for a water-supply interruption notice. If you suspect a frozen or burst pipe, close an accessible valve if safe and call a plumber. Do not use an open flame or electrical appliances near water. Do not open walls or try to heat concealed pipes yourself.

After thawing

Inspect accessible joints and watch for moisture. Even a small leak may need repair. Before a long absence, arrange safe isolation or draining of the installation with a plumber.