What should I do first when a line bursts in a freeze?
Close the main shut-off, open a faucet on the lowest floor to relieve pressure, and keep electrical equipment away from the water. Then call. The thaw can release more water than expected, so the first minutes are about stopping the flow.
Once the main is closed, the water in the lines drains out at the open faucet and the flow slows. Leave that faucet open while the house drains, and keep a bucket under it if water is still coming. Do not try to repair the line with tape until it is safe to work on, because the joint can come under pressure again when the line refills.
If the water has reached a light fixture, an outlet or an appliance, turn off the circuit at the panel only if the panel is dry and you can reach it without wading. Otherwise leave the power off and say so when you call.
Why did the leak start days after the freeze?
Because a split line can hold while it is frozen and begin to leak when the ice melts and the pressure returns. The thaw is when the water finds the gap, and it can run into a wall for days before a stain appears.
A frozen line is not automatically broken, but it should be checked. Turn the tap on slowly once the house is warm. If nothing comes out, or the flow is weak and rusty, call a plumber rather than forcing it.
The thaw is the moment to be alert. Listen for running water in the walls, check the ceilings below the lines and look at the meter. A drip that starts on a mild afternoon is often the first sign of a split from the week before.
How far does a leak from a frozen line spread?
Further than the stain. Water follows the framing, runs down inside the wall and along the joists, and can reach a room some distance from the break. The drying plan covers the whole path, not only the visible patch.
A leak inside a wall travels down the stud bays until it meets a plate or a joist, then runs along that line until it finds an opening. A ceiling stain may have come from a bathroom two rooms away, so crews measure the path with readings and mark each point the water reached.
The reach is recorded on a plan of the house so the repair trades know where the wet framing is before they open anything. That record also decides which materials come out and which dry in place.
Will the insurer pay for a frozen line?
Many standard homeowner policies cover sudden water damage from a burst pipe, but the terms differ, and some exclude damage from freezing when the heat was off or the house was empty. Read the policy and ask the insurer in writing what it covers.
The most useful record for a claim is the time the water was shut off, the photographs of the damage and the readings that show how far the water went. Keep the failed section if it is replaced, because the break is evidence of how the line failed.
Tennessee homeowners with a dispute can take a written complaint to the Department of Commerce and Insurance, and this page does not decide what a policy covers.
How do I protect the lines before the next freeze?
Insulate exposed lines, seal the gaps where cold air reaches them, keep the heat at a steady setting and know where the main is. A plumber can advise on heat tape for the most exposed runs.
Lines in outside walls, garages and under the house are the most at risk. Foam insulation on the exposed runs and a sealed opening where a line enters the house are cheap steps that reduce the risk.
On the coldest nights, let the taps served by the most exposed line drip slightly and keep cabinet doors open on outside walls so warm air reaches the pipes.
