Wall and floor repairs are the part of a liner job homeowners cannot see and are most likely to be sold badly. Some of them are genuinely required; some are upsells. This page explains what each repair is for, what it costs in published 2026 figures, and how to tell the difference on your own pool.
Rust and corrosion on steel walls
Steel pool walls are coated, and the coating fails at the cut-outs and along the base where water sits. Once corrosion starts, it expands, lifts the liner, stains it and eventually perforates the panel.
Spot treatment and coating of sound panels is the cheap outcome. Panel replacement is structural work, itemised separately, and in Nashville it is one of the scopes that requires a Davidson County permit and inspection.
Floor base: vermiculite and the soft patch
Inground vinyl pools usually have a vermiculite or concrete base under the liner. It can go soft, delaminate or hollow out, and you feel it as a spongy area underfoot. Floor patching runs $150 to $3,000 depending on the extent, and a full rebuild $1,200 to $3,000.
This is the repair most often skipped, because a small soft spot is easy to ignore when the water is out and the weather is bad. It is also the one that shows up as a wrinkle or a puncture a season later.
Wall foam and liner backing
Wall foam sits between the wall and the liner. It cushions the liner against rough or rusty surfaces, reduces the chance of punctures, and makes the wall feel smooth. It is cheap next to the liner itself, and it is the sensible default on any pool with a wall that is not pristine.
How to sanity-check the repair list
- Ask for photos of every defect, taken after the old liner is removed
- Ask for the repair to be priced line by line: how much area, what material, what labour
- Ask what happens if a repair is declined, and whether it affects the liner warranty
- Ask whether the work is maintenance or permitted structural work
Frequently asked questions
How do I know if my pool walls need repair?
You cannot tell from above the water. The walls are only inspectable with the old liner out, which is why repairs are quoted after drain-down and why photos of the defects are reasonable to request.
Does wall repair need a permit in Nashville?
Replacing wall panels or changing the shell does require a Davidson County permit and inspection - Code Enforcement at LUESA issues building, electrical and plumbing permits here, and the county Public Health department approves pool construction. Treating and coating sound panels as part of a liner replacement is maintenance.
What does vermiculite floor repair cost?
Published figures are $150 to $3,000 for floor patching or vermiculite repair depending on damage, and $1,200 to $3,000 for a full floor rebuild.
Is wall foam worth it?
On a wall that is not perfect, yes. It is inexpensive relative to the liner and it protects against the abrasion and punctures that a rough wall causes.
