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—Building a new pool

Excavating for a pool

Excavation is the loudest and dustiest stage of a pool build, and the one where the ground reveals what it is really made of.

Once approvals are in place and the design is fixed, the pool outline is marked on the ground and excavation begins. Depending on access, digging is done by machine or by hand. The excavated soil — the spoil — has to go somewhere: removed by truck, or partly reused in the garden if the design allows. The hole is cut slightly larger than the finished pool to leave room for the shell and its reinforcement.

Construction guides follow a new pool from the first idea to the first swim, so each stage is easier to plan and to question.

Excavation is when ground conditions become clear. Hard rock may need breaking; loose fill may need stabilising; groundwater may need pumping during the works. Digging close to the house or a boundary wall is done carefully so their foundations are not undermined. The finished excavation is checked for dimensions and levels before steel and concrete work begins.

01Summary

What matters most here

  • Spoil has to go somewhere

    Removal or reuse is planned before digging starts.

  • The ground can surprise

    Rock, fill or water may change the method.

  • Foundations are protected

    Digging near walls and the house is done with care.

02Detail

During excavation

  • Marking out

    The outline and levels are set out from the drawings.

  • Digging

    By machine where access allows; by hand where it does not.

  • Groundwater

    If water enters the hole, it may be pumped out while work continues.

  • Checking

    Dimensions, depths and levels are confirmed before the next stage.

03Before you start

For the household

  • Plan for noise and dust

    Close windows and move cars if needed.

  • Secure the site

    Fencing or barriers around the excavation.

  • Agree the truck route

    Especially in communities with shared roads.

—In practice

How to use this

Before digging starts, agree where spoil goes, the route for machinery, how nearby walls and foundations will be protected, and what happens if rock or groundwater is found. Keep children and pets away from the open excavation, and ask for the dug shape to be checked against the setting-out before any steel is placed.

Mistakes worth avoiding

No plan for the spoil
Excavated soil piled in the garden damages planting and blocks access. Agree its removal or reuse before the first bucket is dug.
Leaving the excavation unprotected
An open hole in a family garden is a real hazard. It needs barriers until the shell is built and the area made safe.

04FAQ

Common questions about this

What happens to the soil?
It is usually removed by truck; some may be reused in the garden if the design allows.
What if rock is found?
It may need breaking, which takes longer. The contractor should explain the impact.
Can excavation damage my house?
Digging near foundations is planned to avoid undermining them; the survey identifies these areas.
Why is the hole bigger than the pool?
Room is needed for the reinforcement, concrete shell and backfill.

05Read next

More pool guides on this

Filed under new pool construction. Every pool guide is listed on the pool guides page.

—NEXT

Planning excavation?

Send photos of the site and access. We will explain what to expect.

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