AQUA-SPAZIO

A deck-level, or overflow, swimming pool is a design where the water is at the same height as the surrounding deck. The water continuously spills over the pool's edge into a perimeter channel, giving the pool a sophisticated, sleek, and minimalist appearance. This system also provides superior water quality and circulation. 

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Deck-level system design

 

The defining feature of a deck-level pool is its overflow system, which requires a specific set of components for proper function. 

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• Overflow channel: A continuous channel runs around the entire perimeter of the pool. Water overflows the edge and into this channel.

• Balance tank: This underground holding tank stores the water that overflows from the pool. It is a critical component for maintaining the water level and volume, especially when swimmers displace water. A balance tank typically holds around 15% of the total pool volume.

• Water circulation: From the balance tank, water is pumped to the filtration system for cleaning and treatment. It is then returned to the pool via inlets located near or in the floor. This "top-down, bottom-up" circulation pattern effectively removes surface pollutants and eliminates dead spots.

• Deck grading: The pool deck must be laid with a slight downward slope towards the overflow channel to ensure any water that splashes out drains properly. 

 

Aesthetic and material considerations

 

The aesthetic appeal of a deck-level pool comes from the seamless transition between the water and the surrounding deck. The choice of materials for the channels and surrounding surfaces greatly influences the final look. 

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• Channel cover options:

  • Grates: The channel can be covered by a series of grates, typically made from durable materials like plastic or high-grade stainless steel. Plastic is cost-effective, while stainless steel offers a premium, modern finish.

  • Slot drains: For a cleaner, more minimalist appearance, a narrow, single-slot drain can be used. This option can be difficult to clean, so accessibility must be considered in the design.

  • Natural stone or tiles: For a luxury finish, the channel can be covered with tiles or stone that match the pool surround, creating an almost invisible drain. Portuguese Limestone has also been used for its aesthetic qualities.

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• Surround materials: The deck material should be non-slip and able to withstand constant moisture without becoming a safety hazard.

  • Natural stone or pavers: Provide an elegant finish but require a stable base to prevent shifting. The Spruce showcases a custom Palm Springs design with concrete slab decking, edged with gravel for a modern look.

  • Composite decking: Low-maintenance, moisture-resistant options are ideal for pool surrounds. For instance, 

    Cladco Composite Decking Boards

     are anti-slip and come in various colours.

• Pool finishes: With the vertical wall face constantly covered by water, tiling the entire pool interior is often unnecessary. Focusing on the finish of the pool floor and any visible coping stones can be more cost-effective. 

 

Construction and safety

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Designing a deck-level pool is a complex process that is more demanding and costly than a standard skimmer pool. 

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• Engineering and space: The overflow system and balance tank require specific engineering considerations and more physical space than a traditional pool.

• Stability: The ground must be properly prepared and level to support the pool and deck, especially for in-ground installations.

• Insulation: For indoor pools, the structure's heat retention and moisture control are critical. Part L of the UK Building Regulations, for example, requires the pool shell to be sheathed in insulation.

• Safety surfaces: To reduce injuries, particularly for commercial or public pools, consider using aquatic-rated, non-slip safety surfacing on the deck. Life Floor offers a range of durable, cushioned, and chemical-resistant surfaces for this purpose. 

 

Comparison with skimmer pools

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• In a Deck-Level Pool the water level is at the same height as the deck, creating a sleek, infinity-like edge. In a Skimmer Pool the water level is typically 100–150 mm below the deck, exposing a visible "freeboard" wall.

• In a Deck-Level Pool the water continuously overflows the entire perimeter, providing superior surface water filtration and better circulation while in a Skimmer Pool water is drawn into a few perimeter skimmer baskets, which is less efficient at removing surface debris.

• For a Deck-Level Pool to function correctly the equipment need an additional balance tank, which increases cost and space requirements.The Skimmer Pool uses a simpler skimmer basket system that does not require a balance tank.

• The water quality in a Deck-Level Pool is considered to offer more hygienic due to the constant removal of surface water pollution.A Skimmer Pool is prone to "scum lines" on the tile line if the water level is not maintained correctly.

• A Deck-Level Pool is more expensive to build and install due to the complexity of the overflow system and the balance tank while a Skimmer Pool is generally a more cost-effective and popular option for residential use.