Perma lining is a trenchless pipe repair method that permanently fixes damaged sewer lines and drain pipes by creating a new epoxy-coated pipe inside the existing one, without tearing up your yard, breaking through your driveway, or destroying the landscaping you spent years perfecting. Using a flexible liner saturated with specialized epoxy resin, the pipe is inserted and cured in place to form a seamless, jointless interior that stops leaks, blocks root intrusion, and resists corrosion for decades.
For homeowners across Nashville and Middle Tennessee dealing with recurring sewer backups, root intrusion, or aging pipe damage, perma lining offers a long-term, cost-effective alternative to traditional dig-and-replace repairs. On this perma lining page, you’ll see how the process works, where it makes sense, what benefits to expect, how Coolray installs it, what kind of warranty and durability you can expect, and answers to common questions about timing, suitability, and results. Perma-Liner was established in 1998 for trenchless pipe repair, making them a leading manufacturer in the cured in place pipe industry. And as highly skilled relining experts who install these systems every week, we can tell you firsthand that this technology is the real deal.
No excavation required. Your landscaping, concrete driveways, patios, and walkways stay completely intact. Zero excavation repairs are advantageous in urban environments like Nashville, where properties are close together and yards are tight.
Saves you serious money. It costs 30-50% less than traditional dig-and-replace methods when you factor in the restoration of surfaces, landscaping, and concrete that excavation destroys. This is a genuinely cost-efficient alternative to traditional pipe repair methods.
Completed fast. Most residential jobs wrap up in 1 to 2 days for larger jobs, compared to weeks of disruption with traditional excavation. Some cured-in-place-pipe systems can be installed in as little as 20 minutes for certain sections.
50-year design life. The technology complies with ASTM standards and is designed for a 50+ year lifespan. Perma-Liner offers a 50-year design life warranty on products, so you are covered for the long haul.
Stops problems at the source. The epoxy-coated liner is resistant to corrosion and root penetration, so those recurring backups and slow drains become a thing of the past.
Most plumbers in Middle Tennessee still rely on the old way of doing things. They dig a trench, rip out the old pipe, and replace it. That means costly excavation, weeks of mess, and a yard that looks like a construction zone when they leave.
Coolray's perma lining approach is built differently:
Certified installation expertise. Our team uses premium Perma-Liner materials with a proven track record across north america. Perma-Liner is the first CIPP company approved by NSF International, which means the materials meet the highest safety and performance standards in the contracting industry.
Advanced equipment and techniques. We use high-definition camera inspection systems, hydro-jetting equipment for pipe preparation, and heat assist equipment for proper curing. Whether the liner is air inverted, steam cured, or ambient cured, we match the right pipe repairing techniques to your specific situation.
10-year parts and labor warranty on all installations, backed by our Coolray guarantee plus the manufacturer warranty. That kind of coverage is hard to find.
Same-day service availability for emergency situations, because a failing underground sewer does not wait for a convenient time.
Camera Inspection We start every broken pipe repair project by sending a high-definition camera through your sewer lines. Inspection involves using high-definition cameras to evaluate the condition of your pipes, locate cracks, root intrusion, corrosion, and any other damage. This lets us plan the installation precisely and confirm that perma lining is the right fit for your situation. Trenchless repairs can be completed with only one access point, so we often just need a single point through one of your clean outs or even open end pipes to get started.
Cleaning and Preparation Before any liner goes in, the host pipe needs to be spotless. Cleaning removes debris and tree roots from damaged pipes before lining. We use hydro-jetting to scour the inside of your existing pipes, removing scale, mineral buildup, and root masses. This step is critical because the new pipe liner needs a clean surface to bond properly.
Liner Installation and Curing Here is where the magic happens. A flexible liner soaked in epoxy resin is inserted into the damaged pipe through the access point. Depending on the situation, the liner can be installed using perma lateral air inversion or a pull in place method, with place lining options that include place pipe cipp techniques for the right application. For larger or municipal jobs, installation may also be completed from a manhole through existing manholes with a manhole inversion rehabilitation system. These newly developed trenchless pipe repair systems use user-friendly equipment and workflow for trained crews, and different pipe liners can also be paired with next generation uv technology when the job calls for it. The curing process can use hot water, steam, or ambient light. Once cured, Perma-Liner creates a durable seamless pipe within the old pipe. The result is a smooth, corrosion-resistant new pipe inside your existing one, and it is installed safely with minimal disruption to your daily routine.
The manufacturer supports a wide range of applications and helps provide plumbers with training and support backed by distribution facilities and Waterline Renewal Technologies resources.
Pipe sizes: Perma-Liner products can rehabilitate pipes ranging from 2" to 48" in diameter, covering everything from small diameter residential laterals to vertical pipe repair solutions in high rises and industrial and factory facilities. CIPP systems can handle 2" to 60" diameters for commercial applications, including factory facilities, and perma patch options may be used for targeted repairs.
Materials: NSF-certified felt liner with epoxy resin system. Our materials meet ASTM standards and carry NSF/ANSI certification for safety and durability, with compatible gun materials selected for proper installation performance.
Reach: The Perma-Lateral System rehabilitates pipes up to 600FT in length, handling even the most extensive line runs. The Perma-Main Top Gun can be installed in as little as 1.5 hours for larger diameter mains.
Coverage area: Nashville metro and all of Middle Tennessee, including surrounding communities.
Installation time: Typically completed within 24 to 48 hours for residential applications. Access is often made through a single entry point, such as clean outs or other open end pipes. CIPP liners can be installed using pull-in-place or inversion methods with place lining and pipe liners suited to the application, then cured in as little as 20 minutes for individual sections using ambient, steam, hot water, or next generation UV technology, which means less waiting around for you. For larger sewer work, similar place pipe CIPP methods can also be installed through a manhole or existing manholes, including a manhole inversion rehabilitation system.
Warranty: 10-year Coolray guarantee covering parts and labor, plus manufacturer warranty with a 50-year design life.
Ideal for:
Homeowners with recurring sewer backups or slow drains. If you keep calling a plumber for the same pipeline problems, lining solves the root cause instead of just treating the symptoms before a failing pipeline gets worse.
Properties dealing with root intrusion. Nashville's sewer systems often consist of clay pipes prone to root intrusion. Tennessee's mature trees are beautiful, but their roots wreak havoc on older clay and cast iron pipes. Perma lining seals every joint and crack so roots cannot get back in, helping prevent leaks and even breakage.
Homes where excavation would cause expensive damage. If your sewer lines run under a concrete slab, paved driveway, or carefully maintained landscaping, trenchless technology preserves landscaping and historical foundation integrity without the disruption of rebuilding infrastructure versus repairing the line in place.
Older Middle Tennessee homes with corroded cast iron or crumbling clay pipes. These are the most common candidates we see, and perma lining is perfectly suited for this kind of rehabilitation.
Properties in tight urban spaces. Simple residential applications in downtown Nashville neighborhoods or dense subdivisions benefit from the minimal footprint of trenchless sewer repair, including vertical pipe repair solutions for high rises and similar properties.
If you want your pipes rehabilitated relined without turning your property into a dig site, this lining system fits your needs.
Stop dealing with recurring pipe problems, messy excavation, and temporary fixes that do not last. Perma lining is the permanent underground pipe repair solution that protects your property and your wallet.
Call Coolray today for your free camera inspection and get upfront pricing with no surprises. We serve Nashville and all of Middle Tennessee with the trenchless pipelining expertise your home deserves.
Is perma lining as durable as new pipe replacement? Absolutely. Once the cured in place pipe liner hardens, it becomes a fully structural pipe inside your old one. Repairs can improve flow capacity due to a smooth epoxy surface that actually outperforms the rough interior of aging cast iron or clay. With a 50-year design life and resistance to corrosion and root penetration, you are getting durability that matches or exceeds traditional replacement in most situations.
How long does the installation process take? Most residential perma lining jobs take 1 to 2 days from start to finish. That includes the camera inspection, hydro-jet cleaning, liner installation, and curing. The actual curing stage can happen remarkably fast. Trenchless pipe repair eliminates the need for excavation, which is what saves you all that time compared to traditional methods.
What warranty coverage do I get with Coolray? You get our 10-year Coolray guarantee covering both parts and labor on every installation. On top of that, the Perma-Liner manufacturer warranty backs the product with a 50-year design life. We stand behind our work completely.
Will perma lining reduce the size of my pipes? The liner does add a thin layer inside the pipe, but for standard 4-inch and 6-inch residential pipes, the reduction is minimal. In practice, the smoother epoxy interior actually improves water flow compared to your old, rough, corroded pipe. Most homeowners notice better drainage after installation, not worse.
When is perma lining not the right choice? If your pipe has completely collapsed, has large missing sections, or severe misalignment, traditional replacement may be necessary. That is exactly why we start every job with a thorough camera inspection. We will always be upfront with you about the best approach for your specific situation.
Repiping costs vary based on home size and pipe material, as well as the number of fixtures, accessibility of your plumbing runs, and whether you choose copper or PEX. A whole home repipe in the Nashville area typically ranges from $3,000 to $13,000 or more depending on these factors. Partial repipes often fall in the $1,500 to $5,000 range. We provide free in-home estimates with honest pricing so you know exactly what the job will cost before any work begins. We also offer financing options to make larger projects more manageable.
A typical repiping project takes 3 to 7 days to complete for a standard home. Homes with crawlspace access tend to go faster, while slab foundations or multi-story layouts may take a bit longer. During the work, we isolate sections and replace them strategically so you have water available for most of the process. There will be brief periods where we need to shut water off, but we always coordinate with you to schedule around your needs so there's minimal disruption to your daily routine.
Every repiping installation from Coolray comes with our 10-year parts and labor warranty. We use copper and PEX pipes, which are the two most popular and reliable materials in the industry today. Copper is ideal for exposed runs and offers exceptional durability. PEX, or cross linked polyethylene, is flexible, resistant to scale buildup, and performs well in our Middle Tennessee freeze and thaw cycles. Both are code-approved, and we use the right materials and fittings for your specific home. Hard water issues can require water softeners or flushes for effectiveness, and we can advise you on that as part of your assessment.
There are several signs to notice. Discolored or foul-smelling water can indicate pipe corrosion. Low water pressure can signal corroded pipes restricting flow. Frequent leaks can be a sign of failing plumbing, and water damage spots on ceilings suggest plumbing issues behind your walls. Corroded pipes can affect water quality, impacting daily activities like cooking and bathing. If your home was built before the mid-1980s and still has its original plumbing, it's worth having an inspection. Leaking pipes can cause damage to a home, including mold and rotting, so acting sooner rather than later saves money.
Absolutely. Repiping can increase your home's resale value significantly. New pipes reduce leaks and water damage risks, and repiping enhances water quality by eliminating rust. Home inspectors flag outdated plumbing more rigorously now than ever, and buyers pay attention. A complete pipe replacement with modern materials removes a major concern for potential buyers and can easily justify the investment when it comes time to sell.
Get up-to-date current news, promotions and industry tips.