Leak Detection in Forest Hills

Last reviewed and updated: 2026-09-28

Forest Hills is an established Marietta neighborhood with a mature tree canopy. In this part of the city the plumbing question is usually about age rather than anything exotic: what material was standard when the house was built, how many times it has been repaired since, and whether the water utility is the city or the county.

The practical starting point is the same everywhere: confirm the leak exists at the meter, then narrow it to inside or outside the house before anyone opens anything.

Tree roots and older sewer laterals

Marietta's mature tree canopy is one of the best things about living here and one of the hardest things on its sewer laterals.

Roots seek moisture and find it escaping at the joints of older clay and cast iron pipe. Once inside, they trap solids, which is why the first symptom is usually repeated backups rather than a visible leak. Cutting the roots clears the blockage but not the defect that let them in, so they grow back.

Drain lines are not pressurized, so acoustic listening does not work on them. They are diagnosed with a camera inspection that shows the inside of the line, cracks, joint offsets, root masses, bellies where the pipe has sagged, and with smoke testing for odor sources a camera cannot see. Repeated backups on the same line point to a structural repair rather than another cleaning.

Slab, crawlspace or basement: it changes everything

The foundation under your house decides how long a leak can hide. It is the most useful thing to know before anyone comes out.

Slab on grade. Supply lines run through or under the concrete. A leak there can run for months producing nothing but a climbing water bill, until a warm patch, cracked tile or damp carpet finally appears. These are slab leaks, located acoustically, through the concrete.

Crawlspace. The pipe is accessible, so a leak usually shows within days, but that same exposure makes the pipe vulnerable to freezing after a hard Marietta winter.

Basement. Water shows quickly, but in a finished basement it has already traveled along joists before appearing, so the ceiling stain is rarely below the actual leak.

What your insurance will and will not pay for

Georgia homeowners policies generally pay for leak detection only as part of a covered loss, not as a standalone inspection.

Where a leak has caused damage your policy covers, insurers commonly pay to locate the leak, gain access to the pipe, and restore what had to be opened. What a policy does and does not cover is set out on the homeowners insurance page, a public adjuster described typical handling as covering "leak detection, access to the pipe, treating the soil, and pouring new concrete into the void." The pipe repair itself is frequently treated as maintenance and excluded.

The two exclusions that defeat most claims are earth movement and gradual deterioration or wear and tear. A slow pinhole that ran for months is easy to characterize as gradual, which is why documenting when symptoms first appeared matters so much. Read your own policy, and speak to your carrier before work begins.

Water pressure as an early warning

Pressure is one of the few things that tells you something is wrong before any water appears.

A sudden drop across the whole house usually means water is escaping before it reaches your fixtures, a valve has partly closed or failed, or the utility is working on the main. Ask a neighbor first, if their pressure dropped too, it is the utility and not your plumbing. If the drop is only at your house, see sudden low water pressure. A drop confined to one fixture is almost always a blocked aerator or a worn cartridge.

Pressure that is too high is its own problem. Sustained static pressure above roughly 80 psi shortens the life of supply lines, water heaters, valves and appliance hoses, and contributes directly to pinhole leaks. A gauge that screws onto an outside tap costs very little. If a house has had several unrelated leaks, a failed or missing pressure-reducing valve is worth ruling out.

Which water utility bills you here

Billing is mixed across this part of Marietta. Some addresses fall inside the City of Marietta utility service area and are billed by Marietta Power & Water; others are served by Cobb County Water System. They run separate leak credit processes with separate paperwork, so check the utility name printed on your bill before applying for a credit.

Local notes

Mature trees are the defining feature here, and they sit directly above the sewer laterals. If you have had the same line cleared more than once, the cleaning is treating a symptom, a camera inspection will show whether the joint that let the roots in needs a structural repair.

Frequently asked questions