—Building a new pool
Forming the concrete pool shell
The shell is the pool’s structure. Everything that follows — waterproofing, tiles, equipment — relies on it being built correctly.
A concrete pool shell is a reinforced structure that holds the water and resists the ground around it. Steel reinforcement is tied into a cage following the structural design, with fittings such as returns, skimmers, main drains and light niches positioned before concrete is placed. Concrete is then either sprayed onto the reinforcement or cast into formwork, depending on the method used.
Construction guides follow a new pool from the first idea to the first swim, so each stage is easier to plan and to question.
After placement, the concrete needs time and moisture to cure and gain strength. Curing in Dubai’s heat needs care, because fast drying can weaken the surface. Before waterproofing, the shell is checked for dimensions, levels, smoothness and the correct position of every fitting, since changes after this point are difficult.
01Summary
What matters most here
Steel follows the design
Reinforcement is placed according to structural drawings.
Fittings are cast in
Their positions are fixed before concrete.
Curing matters
Heat makes careful curing more important.
02Detail
How the shell is formed
Reinforcement
Steel bars tied to the specified spacing and cover.
Cast-in fittings
Returns, skimmers, drains and light niches positioned and secured.
Sprayed concrete
Applied onto the reinforcement and shaped, suited to curved forms.
Cast concrete
Poured into formwork, suited to straight walls.
Curing
Keeping the concrete moist so it gains strength evenly.
03Before you start
Before the concrete goes in
Confirm fitting positions
Lights, returns and steps.
Confirm step layout
Shape and position of steps and ledges.
Ask about curing
How it will be managed in the heat.
—In practice
How to use this
Ask how the shell will be formed — sprayed or cast — and how curing will be managed in the heat. Before concrete is placed, confirm that every fitting is in position: returns, skimmers, drains, light niches and any feature lines. Ask for photographs of the reinforcement and fittings, and for the curing period to be respected before waterproofing begins.
Mistakes worth avoiding
- Rushing the curing
- Concrete gains strength and stability as it cures. Moving on too early risks cracks that later show through the finish.
- Forgetting a fitting
- A missing return or light niche discovered after the pour means cutting into new concrete. Check positions before it is placed.
04FAQ
Common questions about this
- Why can’t fittings be added later?
- They are cast into the concrete; adding them later means cutting the shell.
- Is sprayed concrete as strong as cast?
- Both are used successfully; the method suits the shape and site.
- How long does concrete cure?
- It continues to gain strength over weeks; the next stage waits until it is ready.
- Does heat affect concrete?
- Yes. High temperatures speed up drying, so curing is managed carefully.
05Read next
More pool guides on this
- Waterproofing a new poolAnother stage of planning and building a pool.
- The plumbing between pool and plantAnother stage of planning and building a pool.
- Choosing pool copingA related design decision.
- Choosing a pool deck materialA related design decision.
Filed under new pool construction. Every pool guide is listed on the pool guides page.
—NEXT
Want to understand your pool’s structure?
Ask us about the shell design. We will explain how it is built.