Slab Leak Repair and Replacement in Austin, TX

Clay on the east side, limestone on the west

A line of hills called the Balcones Escarpment runs through Austin and divides the city’s ground. East of it, soils are heavy clay that swell when wet and shrink when dry. West of it, limestone lies near the surface and soils are thin and rocky. Slabs on the east side ride clay movement through wet and dry seasons. Slabs on the west side are often poured over a prepared bed above rock.

The result for lines under a slab is different in each place. On clay, small repeated movement works on bends and joints. On rock, a line can rest on hard points. Both can wear a pipe wall from the outside over many years. This is background on the area, not a finding about a house.

Housing from the 1920s to now

The oldest neighborhoods near the center have houses from the 1900s through the 1940s, many raised on piers. Postwar growth brought slab ranches north and south of the center. The 1970s through the 1990s filled in the northwest and southwest hills, and since the late 1990s very large communities have gone up on every side. Most recent construction uses PEX.

Copper under the slab is common in houses from the 1960s through the 1980s. Some from the late 1970s to the mid-1990s may have polybutylene. A technician confirms what a particular house has.

Tracking down the leak

The technician isolates hot and cold lines, pressure tests the suspect line and listens along the floor with acoustic equipment. Thermal imaging can show a warm path under tile or wood. These steps narrow the location before any opening is made. They do not always give an exact point. See how slab leaks are found.

First measures at home

Turn off every fixture and appliance that uses water, then check whether the meter moves. If it moves, water is escaping somewhere on the property. See water meter leak check. If water is surfacing, shut off the main if you can reach it safely, keep people and pets away, move valuables and call. Stay clear of outlets and appliances near standing water. If anyone smells gas, leave and call the gas utility and emergency services from outside.