How does a frozen pipe turn into a split pipe?
Water expands when it freezes, and the pressure inside a closed line can split the pipe at a weak joint. The split often opens only when the ice melts and the water begins to flow again.
A line that is fully frozen does not leak, because the ice holds the water in place. The problem comes on the thaw, when the water moves and the split at the frozen section lets it out under pressure. That is why the leak is often discovered hours or days after the cold snap, and why the first wet spot can appear in a room that was never cold.
Thin copper and older galvanized steel are the materials most often affected in houses of this age. A joint or a bend can crack without any visible sign, and the first symptom is a wet wall or a stain on the ceiling below.
Where does the water go once a line bursts in a Hammond house?
Water follows gravity and the framing. It runs down the stud bay, along the joists and under the subfloor, and it can reach the room below through a ceiling, a light fixture or a gap around a pipe.
Many older houses here have plaster over wood lath on the upper floors, and the gaps in the lath carry water behind the plaster for a surprising distance. A leak that shows as a small stain on a ceiling may have soaked a whole section of wall, and the subfloor above it may still be wet.
In multi-story houses the water can reach a basement wall and run down the inside face of the foundation. The moisture readings are taken across every level the water could have reached, not just the room where the stain was first seen.
What should you keep, shut off or move before the technician starts work?
Shut the main, move valuables and papers out of the path of the water, and leave wet electrical equipment alone. Photographs of the damage before anything is moved are the most useful record you can make.
Furniture, boxes and rugs in the path of the water should be moved if they can be lifted safely. Electrical fixtures and outlets in the wet area should be left alone until the power is confirmed off at the panel. If the water is near the furnace or the water heater, the call should say so, because those appliances need a check before they are used again.
Photographs and video of the damage, the ceiling and the wet floor should be taken before anything is removed. They show the state of the room at the start, and they are the first thing an adjuster will ask to see when the claim is opened.
What does a burst pipe repair cost, and who does it?
The restoration work and the pipe repair are different jobs. Restoration removes water and dries the building. The pipe repair is done by a plumber, and its cost is quoted by that plumber, not on this site.
No price is given on this site for either stage, because the size of the leak, the number of rooms affected and the amount of finish that has to come out decide the cost. A pipe that splits behind one wall is a different job from a line that has run water through three floors. The technician explains the scope and the owner approves it before work begins.
The plumbing repair is the owner's to arrange. Ask the plumber what licence or registration the repair requires and ask to see it, and keep the invoice with the restoration file, because the insurer may ask for both.