When It's Time to Repipe: A Mountain Home Owner's Guide

The Pipe Problem Specific to Mountain Homes

Two pipe materials account for the majority of repiping jobs I do in North Georgia: galvanized steel and polybutylene. Both were widely used in construction before better options took over. Both are now a problem.

Galvanized Steel Pipe

Galvanized pipe was the standard for residential water supply from the early 1900s through the 1960s, and you still find it in homes built into the 1970s in rural areas where older materials stayed in use longer. It is steel pipe coated with zinc to prevent corrosion. The zinc works fine for decades. Then it starts to fail from the inside out.

As the zinc coating degrades, the interior of the pipe corrodes and the rust buildup narrows the pipe bore. What was once a 3/4-inch supply line might have an effective opening of 3/8 of an inch or less after 40 or 50 years of corrosion. Pressure drops. Water discoloration shows up, especially first thing in the morning. Fittings and joints start to weep. The pipe does not fail catastrophically all at once. It just gets worse, and then one section develops a pinhole, and then another, and eventually you are chasing leaks one at a time in a system that is done.

I have been in crawl spaces in Ellijay where galvanized runs were so corroded inside that I could barely push a small wire through them. The homeowners had been living with what they thought was just low water pressure for years.

Polybutylene Pipe

Polybutylene, often called poly-b or PB pipe, was used extensively from the late 1970s through 1995. It is a gray flexible plastic pipe, and at the time it looked like an improvement over rigid copper: flexible, easy to install, cheaper. The problem is that chlorine and other oxidants in water react with the pipe wall over time and cause it to become brittle and crack. The fittings are often a bigger failure point than the pipe itself. Plastic acetal fittings that came with poly-b systems crack and fail with little warning.

Polybutylene was the subject of a national class action settlement in 1995 and has been off the market since then. But the pipe itself is still in millions of homes across the Southeast. Many mountain cabins built from 1980 to 1995 have it. If you bought a property in that era and no one has ever mentioned the piping, it is worth finding out what you have.

Signs the Pipes Are the Problem

Some of these are obvious. Some are easy to explain away until they are not.

• Rust-colored water when you first run a tap: This is galvanized corrosion. The rust flushes through when water starts moving. It clears up but the pipe is deteriorating.
• Pressure that keeps getting worse over months or years: Galvanized corrosion narrows the pipe over time. If pressure has been declining for a year or two with no obvious cause, the pipe bore is the likely reason.
• Multiple small leaks in different parts of the system within a short period: One leak is an isolated failure. Two or three in the same year, in different locations, means the whole system is at or near end of life.
• Visible gray flexible pipe behind appliances or under sinks: If you see it, get it tested. That is poly-b.
• Damp spots in walls or ceilings without an obvious source: Can be slow leaks in walls. Worth a closer look before you dismiss it.

The one thing that points toward the pipes rather than isolated fixture issues is when the problems are widespread. A single fixture with low pressure or one leak under a sink is usually a local problem. Low pressure through the whole house, recurring leaks in multiple locations, and discolored water at every tap point to the supply system itself.

What Repiping Actually Involves

A full repipe means replacing all the water supply lines in the home: from the main shutoff to every fixture. It does not typically include drain lines, which are a separate system and a separate job.

PEX vs Copper

Most residential repiping today uses PEX tubing. Cross-linked polyethylene is flexible, durable, resistant to freeze damage because it can expand slightly, and significantly faster to install than copper. It does not require soldering, which means fewer torch-related fire risks in tight spaces. A PEX repipe in a typical 3-bedroom, 2-bath home takes less time and costs less in labor than the same job in copper.

Copper is still a valid choice and has a longer documented track record. If you are in a high-end renovation and want copper, the material cost is roughly three to four times that of PEX. For most mountain home owners, PEX is the right call. It handles the freeze-thaw cycles in North Georgia better than any rigid pipe material.

Access Challenges in Mountain Homes

This is where North Georgia is different from a standard suburban repipe job. Mountain properties have their own complications.

Log homes: Log walls are solid wood. There is no wall cavity to route new pipe through. Every run has to go through the floor, through a chase, or in some cases be exposed and covered with a decorative sleeve. It takes longer to plan and longer to execute. A log cabin repipe is not the same job as a stick-built house of the same square footage.

Crawl spaces under stone foundations: A lot of older mountain homes in Gilmer County sit on stone piers or rubble stone foundations. The crawl space access is often tight, sometimes 18 inches or less of clearance in places. Running new pipe through those spaces means working flat on your back in the dark. I have been in crawl spaces up here where I had to snake pipe around old stone piers that were set with no thought to any future service work. It is doable, but it is not fast.

Seasonal cabins: A property that has been winterized and de-winterized every year, sometimes by people who did not fully drain every branch line, often has water damage and corrosion in places that only become visible when you start pulling pipe. Budget for unknowns on seasonal properties. I find rotted subfloor under leaking supply lines in vacation cabins more often than I find it in full-time residences, simply because the leaks go unnoticed longer.

What a Repipe Involves

Repiping is not a small job. Site conditions, house size, pipe material, and access all affect the final number. Call for a free estimate specific to your property. Most homeowners who have put off a repipe tell me they wish they had done it sooner, because each leak repair along the way was money spent on a system that was not worth saving.

How Long It Takes and Living There During the Job

A typical repipe in a 3-bedroom home runs 2 to 4 days for the plumbing work itself. A log home or a property with difficult access can run a week or more. During the job, water to the house is off for most of each workday. We restore service at the end of each day so the home is livable overnight.

Most homeowners stay in the house during a repipe without much disruption beyond the daily shutoffs. The bigger inconvenience is the patching: where we cut drywall to access pipes in walls, that drywall has to be repaired after we are done. On a PEX job with good planning, we minimize the number of cuts. But some are unavoidable. You should plan to have a painter or drywall contractor come through after the plumbing is finished.

Why You Want a Licensed Master Plumber, Not a Handyman

Repiping is permitted work in Georgia. It requires a licensed plumber to pull the permit and a licensed master plumber to oversee the job. An inspection has to happen after the work is done, before the walls are closed up. That inspection protects you: if something is wrong, it gets caught before it is buried in a wall for the next 30 years.

I have followed behind handyman repipe jobs that failed inspection and had to be redone entirely. The homeowner paid twice for the same work. For a job of this scope and cost, use someone licensed, pull the permit, and get the inspection. If a contractor tells you permits are not necessary for a full repipe, that is a reason to walk away.

If you are in Gilmer or Pickens County and you have an older property, or if you have been dealing with chronic pressure issues or recurring leaks, a pipe evaluation costs nothing. Call and describe what you are seeing. In most cases I can quickly tell you whether what you are describing sounds like a repipe situation or something else.