Do You Have a Slab Leak? Boulder Slab Leak Risk Checker

The most reliable signs are: a water meter that keeps moving with all fixtures off, an unexplained water bill spike, warm or hot spots on the floor, the sound of running water when nothing is on, and low water pressure throughout the house. Boulder's older homes, particularly those built between 1960 and 1985 with original copper plumbing, are especially susceptible.

Boulder's five-block rate system means a slab leak that pushes monthly use above the household water budget moves into Block 3 at $15.06 per 1,000 gallons, more than twice the Block 1 rate of $5.65. A moderate slab leak at 5 gallons per hour adds about 3,600 gallons per month. At Block 3 rates, that is over $54 per month in water cost alone, before wastewater charges.

Licensed leak detection technicians use acoustic sensors, thermal cameras, and tracer gas to pinpoint a slab leak through intact concrete, usually in two to four hours. A single opening at the confirmed spot is all that is needed. No guesswork demolition.

Yes, indirectly. Boulder's Front Range climate produces real freeze-thaw cycling from October through April. The soil beneath the slab expands when wet and contracts when dry, flexing buried copper pipe at every joint and fitting over decades. Coupled with Boulder's soft, slightly corrosive water chemistry, this accelerates pitting corrosion in older copper installations under the slab.