Vinyl liner pool installation in Greenville, NC is how a lot of Pitt County families get into an inground pool without a six-figure budget. The structure is a perimeter of steel or polymer wall panels braced back into the ground, a hand-shaped and compacted floor, and a custom vinyl membrane fitted over the whole thing and held in a track at the top. The water pressure holds the liner tight against the structure.
It is the cheapest inground pool to build and the nicest one to stand in barefoot. It also has one scheduled cost that the other two do not: the liner is a wear item. Plan on replacing it, and budget for it, and it is a perfectly sensible long-term pool.
Why the floor is the part that fails around here
In a vinyl pool the floor is not structural concrete. It is typically a vermiculite or grout mix troweled over compacted base, or in some builds a thin concrete floor. It has to be smooth, because every dip and pebble telegraphs through the liner, and it has to stay put.
Our ground makes both of those harder. Pitt County soils are Coastal Plain sand and sandy loam, and across large parts of the county the seasonal high water table sits at or near the surface. Groundwater moving under a vinyl pool floor does two things. It washes fines out from under the floor, leaving voids that show as soft spots and eventually as wrinkles. And when the pool is drained, it can lift the whole floor and the liner with it.
The countermeasures are not complicated but they have to be included. A stone drainage layer under the floor instead of raw sand. A dewatering pipe alongside the pool so groundwater can be pumped down whenever the pool has to come below the water line. And on genuinely wet lots, a sump under the deep end with a pump in it, which is unglamorous and completely worth it.
Wrinkles in a liner are usually a groundwater symptom, not a liner defect. When water gets behind the membrane it floats it off the wall. Chasing it with a new liner without fixing the drainage means buying the same liner twice.
Steel walls, polymer walls, and what our climate does to each
Traditional wall panels are galvanized steel. They are strong, well proven and inexpensive. In consistently wet, acidic ground — which is what we have, since county soils are generally acidic — galvanizing eventually gives way and steel corrodes from the outside in. It is a slow process and a well-drained install lasts a long time. A poorly drained one does not.
Polymer and composite panels do not corrode. They cost more up front and are, for our conditions, a sensible upgrade rather than a luxury. The same argument applies to the wall bracing and the fasteners. If you are building in an area with high groundwater — the flats out toward Grimesland, the low ground near Contentnea Creek around Grifton, anything close to the Tar — this is the place to spend money.
What a new vinyl pool build looks like
- Layout and dig. Fast in sand, but the walls of the excavation need care because sand sloughs.
- Panels set and braced. This is precision work. The panel perimeter has to be dead level and square, because the liner is cut to fit and cannot take up error.
- Plumbing and bonding. Skimmers, returns, main drain with a compliant cover, and the equipotential bond grid tying the panels, the deck steel, the rails and the equipment together.
- Concrete collar. The panels get locked in with a concrete footing around the base.
- Floor. Base material, then the troweled floor, worked smooth by hand.
- Liner set and vacuumed in, then filled immediately — a liner should not sit empty in the sun.
- Deck, barrier, start-up.
Four to seven weeks is typical for the whole sequence in this area, weather allowing.
Liner replacement on an existing pool
A large share of the inground pools in Greenville, Winterville, Ayden and Farmville are vinyl pools dating from the late 1970s to the 1990s, and many are on their second or third liner. Replacement is a good, contained project — but it is also the only chance you get to see the structure underneath, so it is worth doing properly.
When the old liner comes out we look at the panel condition and the bottom of the walls where corrosion starts, the floor for voids and soft spots, the coping and track for damage, and the plumbing penetrations. Fixing a rusted panel section, re-troweling a washed-out floor or replacing a failed skimmer is straightforward with the liner out and disruptive later. This is also the moment to add the drainage that the original build skipped.
If the structure is past saving, we will say so. See renovation and remodeling for conversions — a tired vinyl pool can be converted to fiberglass or gunite, and sometimes that is the better money.
North Carolina rules that apply
The threshold and the classification
General Statute 87-1 requires a general contractor license from the North Carolina Licensing Board for General Contractors on projects costing $40,000 or more, up from $30,000 as of October 1, 2023. Some vinyl liner builds fall below that line and some clear it comfortably once the deck and fencing are included — the statute looks at the cost of the undertaking, not just the pool.
The S (Swimming Pools) classification covers construction, service and repair of pools, excavation and grading, decks and walkways, tile and coping, and the pumps, filters and chemical feeders. It excludes direct sanitary sewer and potable water connections, electrical connections, and the grounding and bonding of metal surfaces.
Safety items on a vinyl pool
The 48-inch barrier with self-closing, self-latching gates applies the same as on any other pool. Main drain covers must meet the federal Virginia Graeme Baker Pool and Spa Safety Act standard — older vinyl pools are the most common place we find non-compliant flat drain covers still in service, and replacing one during a liner change costs almost nothing. Steel wall panels are metal in the pool structure and must be part of the Article 680 equipotential bond grid.
Related pages
Deck construction matters especially here because the coping track carries the liner. Equipment choices affect running cost more on a vinyl pool than people expect. And a spa can be added alongside a vinyl pool as a separate self-contained unit.
Other services
Towns we serve
Questions people ask before they build
How long does a vinyl liner last?
In this climate, plan on roughly eight to twelve years for a well-maintained liner, sometimes longer. Sun exposure, water chemistry and how often the water level is allowed to drop all matter. Liners fail earlier when the pool runs with low chlorine and swinging pH, and much earlier when groundwater is allowed to get behind them.
Why does my liner have wrinkles?
Almost always because water got behind it and floated it off the wall or floor. That water comes from groundwater pushing in from outside or from a leak letting pool water out into the backfill. Smoothing the wrinkles without finding the water source means the wrinkles come back. The fix is drainage first, liner second.
Can you replace just the liner, or does the whole pool need work?
Often just the liner. But the only time anyone can see the walls, floor and plumbing penetrations is while the old liner is out, so that is when the structure gets inspected. Corroded panel bottoms, washed-out floor sections, damaged track and failing skimmers are all cheap to fix at that moment and expensive to fix a year later.
Is a vinyl pool a bad idea with our water table?
Not at all, provided it is built for it. Stone drainage under the floor, a dewatering pipe alongside, and a sump on genuinely wet lots handle the problem. Vinyl pools that fail here are the ones built with none of that on the assumption that Pitt County ground behaves like ground somewhere drier.
Steel walls or polymer walls?
Polymer if you can afford it, in our conditions. Our soils are generally acidic and often wet, which is the combination that eventually eats galvanized steel from the outside. Steel is entirely serviceable in a well-drained yard and has been used here for decades. Polymer removes the variable.
Can I get a custom shape in vinyl?
Yes, within limits. Panel systems make rectangles, L-shapes, lagoon and freeform outlines and can include steps, benches and sun ledges. What they do not do easily is the truly sculptural work, vanishing edges or complex depth transitions. For those you want gunite.
Does a vinyl pool feel different to swim in?
Yes, and most people prefer it. The surface is soft and warm underfoot with no roughness on toes or swimsuits. Plaster in a gunite pool is noticeably more abrasive, particularly on steps and on the floor of the shallow end where children spend their time.