💧 Water & Weather
Preventing Frozen Pipes, and What to Do If One Freezes
A burst pipe can release a huge amount of water in a short time. A few habits during cold snaps prevent most of them.
Marcus Ibe · Oct 7, 2026 · 4 min read · 4 steps
Water expands as it freezes. In a pipe, that builds pressure between the ice blockage and the closed tap, which is why pipes often split some distance from the frozen section itself.
Pipes in unheated spaces and on outside walls are most at risk, and most failures happen during the first hard freeze of the season or when a home is left empty.
Before winter
- Insulate pipes in lofts, garages, crawl spaces, and under kitchen sinks on outside walls with foam lagging
- Disconnect garden hoses and shut off and drain outdoor taps
- Seal draughts near pipes, such as gaps around where they pass through walls
- Find your main stopcock and make sure it turns freely
During a cold snap
Keep the heating on, even when you are away; a low setting is enough for most homes. Open cupboard doors under sinks so warm air reaches the pipes. In very cold weather, letting a tap drip slightly on a vulnerable line keeps water moving and relieves pressure.
If a pipe freezes
If you turn on a tap and only a trickle comes out, a pipe is likely frozen.
- Keep the tap open so water can flow as the ice melts
- Warm the pipe gently with a hair dryer, warm towels, or a space heater kept at a safe distance
- Start near the tap and work back towards the blockage
- Never use a blowtorch or open flame
If a pipe bursts
Turn off the main stopcock immediately, then switch off the electrics in any area where water is near sockets or fittings. Open taps to drain the system, move valuables, and photograph the damage for your insurer before cleaning up.
This is general home-maintenance information, not professional advice. Building codes, permits, and safe practices vary by location — consult a licensed contractor, electrician, or plumber for work beyond your experience.