A pool in the garden is a dream! However, what if it is a plot of land on a hillside? We have compiled the most important information about setting up a pool on a slope and the maximum gradient.

Dangers on slopes

pool must be safe. The possibility of the swimming pool tipping over, sliding or being destroyed by the tilt must be ruled out. If you ignore these aspects, people in your garden can be harmed.

A tilted slope causes the water to collect in one area. That can cause that

  • water overflows
  • the pool overturns
  • the pool wall is too heavily loaded at the center of gravity and breaks
  • the pool slides down the slope
  • the pool construction is destroyed

Maximum slope

The question of the maximum gradient is easy to answer: A pool must stand upright! Even a 1% incline will result in the pool NOT being level. Especially in larger pools, the minimal inclination causes a significant difference in height of the water surface.

Note: To protect against accidents and damage to the pool, the surface must be level! There is no maximum gradient. The permissible slope is zero percent!

even out the gradient

Level the slope before installing a pool in the backyard! You can achieve a balance in two ways:

Dig out a level surface

Dig a level surface for your swimming pool. This variant is simpler, cheaper and not as material-intensive as filling.


  1. 1. Dig the soil in an area at least the size of the pool and a reasonable area around it to move around.
  2. 2. Take the lowest point as a guide.
  3. 3. Consolidate the excavated area with fine crushed stone or fine gravel. Use a shaker to help.
  4. 4. Check the flatness of the area with a spirit level and a measuring rod.
Tip: The best time to set up an inflatable pool is after the Ice Saints. Temperatures around freezing can make the material porous and damage it.

Fill up

Another way to get a level surface on which to set up a pool is by backfilling. A slight gradient of three to five centimeters can be easily compensated with sand and gravel on a pool area of ​​about three meters in diameter.


  1. 1. Fill in the designated area with sand and gravel.
  2. 2. If possible, compact the material with a vibrator. The subsoil must be prepared to be stable and able to bear loads.
  3. 3. Also prepare a level surface around the water basin.
  4. 4. Use the spirit level to check that there is no longer a slope.

frequently asked Questions

A layer of sand, gravel, and crushed stone about 8 to 12 inches thick is recommended to provide a level surface for safely setting up a pool. Compact the subsoil with a vibrator.

In order to prepare the transition between the newly designed level and the original terrain, the following are suitable : – an
– a retaining wall made of stones
– a fortification with stones and grave

For pools that have a diameter of around four meters, a straight safety area should be designed at a distance of at least 50 centimeters all around. If you build an embankment to secure the pool on a slope, the distance to the edge of the pool should also be at least 50 centimeters.

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