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VillaPool

—Building a new pool

Building a pool on a roof or terrace

Water is heavy. A rooftop pool starts with the question of whether the structure can carry it, long before anyone chooses tiles.

A pool full of water weighs a great deal, and a roof or terrace must be designed to carry that load along with the pool structure, finishes and people. A structural engineer assesses the existing building or designs the support for a new one. Some roofs cannot take a pool at all; others need strengthening, or a smaller and shallower design.

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

Waterproofing is critical because a leak would go into the building below, not into the ground. Rooftop pools usually have layered waterproofing under and within the pool, with careful drainage. Equipment needs a nearby location and power, and the building or community’s approval is essential. Access for materials, often by crane or hoist, is planned from the start.

01Summary

What matters most here

  • Structure first

    An engineer confirms the roof can carry the load.

  • Leaks go into the building

    Waterproofing must be layered and tested.

  • Approval is essential

    Building and community consent comes first.

02Detail

What is involved

  • Structural assessment

    Loads, supports and any strengthening needed.

  • Waterproofing

    Membranes below and within the pool, tested before finishes.

  • Drainage

    Overflow and rain water routed safely.

  • Equipment

    Plant space nearby, with noise and vibration considered.

  • Lifting

    Crane or hoist access for materials.

03Before you start

Before planning

  • Get structural drawings

    Of the roof or terrace.

  • Ask the building

    About approval and conditions.

  • Consider wind and sun

    Exposure affects water and comfort.

—In practice

How to use this

Start with a structural engineer’s assessment of whether the roof or terrace can carry a full pool, its finishes and the people using it. Then plan waterproofing for both the pool and the roof below, access for maintenance, drainage for overflow, and the route for plant and equipment. Building rules and approvals for roof works apply before the design is finalised.

Mistakes worth avoiding

Designing before the structural check
If the roof cannot carry the load, design work and approvals are wasted. Structural capacity has to be confirmed first.
Relying on a single waterproofing layer
A leak from a rooftop pool reaches the rooms below. Waterproofing is planned as a system together with the roof itself.

04FAQ

Common questions about this

Can any villa roof take a pool?
No. An engineer has to assess the structure; some roofs need strengthening or cannot carry one.
Why is waterproofing so important?
A leak would affect rooms below, so the system must be robust and tested.
Is a rooftop pool hotter?
Full sun and wind exposure affect temperature; heating or cooling may be needed.
How do materials get up there?
Usually by crane or hoist, planned with the building.

05Read next

More pool guides on this

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

—NEXT

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