Burst Pipe and Slab Leak Water Damage in Plano

• Shut off the main water valve. Most Plano homes have one in the meter box near the street and often a second valve in the garage or on an exterior wall.
• Open a faucet at the lowest point of the house to drain the remaining water out of the lines.
• If water is coming through a ceiling or near light fixtures, turn off power to that area at the breaker if you can reach it from a dry spot.
• If the water heater is the source, turn off its water supply and its power or gas.
• Move furniture, rugs, and electronics out of the water and take photos of everything before cleanup begins.
• Call (972) 944-0660 for extraction and drying, and call a licensed plumber to repair the pipe.

North Texas does not get many hard freezes, which is exactly why homes here are vulnerable when one arrives. Plumbing in exterior walls, unheated garages, and attics is often lightly insulated. During Winter Storm Uri in February 2021, days of temperatures in the single digits caused pipes to burst in homes across Plano and the rest of Dallas–Fort Worth, and many of those failures were not discovered until the ice thawed.

Pipes do not usually burst where the ice forms. As water freezes, pressure builds in the section of pipe between the ice and a closed faucet, and the pipe splits there. That is why a burst often shows up when temperatures rise and water starts flowing again, sometimes in a wall or ceiling far from where you would expect.

When a pipe bursts above a ceiling, water spreads across the insulation and drywall before coming through at the lowest point, so the wet area is usually much larger than the visible stain. Ceilings that sag or bulge should be treated as a safety risk and opened in a controlled way rather than left to fall.

Plano is built on expansive Blackland Prairie clay that swells when wet and shrinks during dry summers. That seasonal movement puts stress on foundations and the water and drain lines running through or under them. Over time, pipes can crack or wear through where they rub against concrete, gravel, or rebar. Hot water lines tend to fail first because heat makes the pipe expand and contract more.

Because the leak is under the concrete, water can spread for weeks before it reaches the surface. It soaks the underside of flooring, wicks up into the bottom plates of interior walls, and sometimes shows up first in a closet or behind cabinets.

Many two-story homes in Plano have water heaters in the attic or the garage. A tank that ruptures in the attic can release 40 to 50 gallons from the tank and keep going until the supply is shut off, bringing down ceilings in several rooms below. Tanks typically last eight to twelve years, so homes from the 1990s and 2000s are often on a second or third unit.

Attic water heaters should sit in a drain pan piped to the outside, and many plumbers recommend adding a leak sensor with an automatic shut-off valve. Rust at the bottom of the tank, water in the pan, popping noises, or rusty hot water are signs the tank is near the end of its life.

Plano grew fastest between the 1970s and the early 2000s, so much of its plumbing is now 25 to 50 years old. Some of the most common failure points are small, inexpensive parts that are easy to overlook.

• Polybutylene supply lines, a gray flexible pipe often stamped PB2110, common in homes built from roughly 1978 to 1995
• Braided and rubber supply hoses on toilets, faucets, and washing machines, which should be replaced every five to ten years
• Ice maker and refrigerator lines behind kitchen cabinets, especially thin plastic tubing
• Pinhole leaks in aging copper lines
• Failed drain pans and clogged condensate lines under attic water heaters and AC units
• Corroded shut-off valves under sinks and behind toilets that fail when turned

If your home still has polybutylene plumbing, ask a plumber about repiping. Insurers may ask about it, and it tends to fail without warning at the fittings.

The plumber stops the leak. Drying the structure is a separate job. Wet insulation is removed from ceilings and walls, small inspection holes or flood cuts are made where drywall is saturated, and drying equipment runs until readings confirm every material is dry. Closing up a wall before it is dry is one of the most common causes of mold behind finished drywall.

Slab leaks need extra attention because concrete releases moisture slowly. New flooring should not go down until the slab tests dry, or the moisture can ruin the new floor and adhesives within months.

Sudden pipe bursts are usually covered by Texas homeowners policies, including freeze damage as long as the home was heated or the water was shut off and drained. Many policies cover the resulting water damage and the cost of accessing the leak, such as breaking out the slab, while excluding the cost of the pipe repair itself. Damage from a leak that went on for months may be excluded as wear and tear or neglect.

Report the claim promptly and keep everything: photos, the plumber's invoice and leak detection report, moisture logs, and samples of damaged flooring if your adjuster asks. Under Texas's prompt payment rules, insurers generally must acknowledge a claim within 15 days and then decide on it within a set number of business days after receiving the information they asked for.

• Insulate pipes in exterior walls, attics, and garages, and cover outdoor hose bibs before a freeze
• During hard freezes, drip faucets on exterior walls and open cabinet doors under sinks
• Keep the garage door closed in freezing weather if plumbing runs through the garage
• Know where your main shut-off is and make sure it turns
• Replace washing machine and toilet supply hoses with braided stainless lines every five to ten years
• Add leak sensors near water heaters, washers, and under sinks, or a whole-home automatic shut-off valve
• Water your foundation with soaker hoses during long dry spells to reduce soil movement around the slab