How To Level An Above Ground Pool?

Ever wondered how to level an above ground container pool without ending up with a lopsided lagoon?
Clear the spot, add a solid sand or stone base, and check with a level — that’s the short answer.

But here’s the thing.
If you skip the details, you could end up with a pool that looks like it’s trying to escape downhill. Or worse, one that springs a leak after your first family swim.

So let’s walk through the why, the how, and the quick fixes — with a few pro tips you’ll thank me for later.

Why Proper Leveling is Absolutely Critical

The Dangers of an Unlevel Pool

The risk of structural collapse and liner damage

Picture this — it’s a hot day, the kids are ready to jump in, and then you notice the water’s deeper on one side. That’s not just a quirk, it’s a red flag.

Uneven pools put all that water weight on one side, forcing the walls to strain like an overstuffed suitcase. Over time, liners stretch, seams weaken, and the whole structure can fail.

We’re talking about:

• More chance of slipping on uneven edges.

• Wall bulges or total collapse.

• Filtration systems working overtime just to keep up.

How a slight slope affects water pressure

Even a small slope changes the way water pushes against the pool walls.
On the deep side, pressure builds. On the shallow side, the liner sags. Both can lead to early wear and tear — and some very expensive repairs.

The Settle-or-Unlevel Problem

Will above ground pool settle?

Yes — every pool settles a little over time.
The trick is starting with a base that’s so solid it only shifts a hair, not inches.

If the ground underneath is soft or poorly compacted, you’ll see the difference quickly. A perfectly level pool in June can start looking like a lazy river by August.

What to do if above ground pool is not level

If it’s off by more than about an inch, you’re in the danger zone.
You’ll need to drain, re-level, and refill.

It’s tempting to ignore it or try “spot fixes” while the pool’s full — but that’s a quick route to a torn liner or bent frame.

A Step-by-Step Guide to Leveling

Preparing the Ground

Removing grass and debris

Start by marking out your pool spot with stakes and string. Measure twice — mistakes here will haunt you later.

Next, strip away the grass, roots, and anything else living there.
A flat spade or sod cutter works wonders. Think of it like rolling out a carpet — only you’re rolling it up and taking it away.

Getting rid of all organic material stops your pool from sinking into soft spots later.

How to level the ground with a tamper or roller

Once you’ve got bare earth, spread a layer of sand or crushed stone.
Sand is easier to work with. Stone drains better — great for rain-heavy UK summers.

Compact it with a tamper or roller until it feels solid underfoot. If it shifts when you walk on it, keep going.

Checking and Fixing the Level

Using a long board and a level

You don’t need fancy kit to check your level.
Lay a long, straight board across the base with a spirit level on top.

Move it around like a clock face, checking every “hour” point for dips or humps.
It’s a bit like icing a cake — you want the whole surface to look smooth and even.

How to add or remove sand to achieve a level base

If you find low spots, sprinkle in sand and tamp it down in thin layers.
For high spots, shave them down with a shovel or rake.

Always recheck after each adjustment. The more precise you are now, the more years you’ll get out of your pool.

Quick Tip on Slopes and Erosion

Got a slope? You can still make it work with a retaining wall and extra base material.
This not only levels your pool but also makes the garden look tidy.

To stop erosion, use geotextile fabric under the pool. It’s like armour for the ground, keeping it firm even after heavy rain.

Final Splash

Level once, and you’ll swim happy for years.
Rush it, and you’ll be fighting sagging walls, twisted liners, and endless maintenance.

Get the ground right, use the right tools, and check your level like your summer depends on it — because it does.

Have you checked out our other posts?

How To Cool Above Ground Pools?

How to Winterize Above Ground Pool?

How To Drain Above Ground Pool?

Should I Cover Above Ground Pool?

When Closing Above Ground Pool?

How Many Hours A Day Should An Above Ground Pool Run?

Do You Leave Your Above Ground Pool Pump On All The Time?

Do I Need To Drain My Pool When It Rains?