Above ground pools have become a popular choice for homeowners looking to add value and enjoyment to their property without the significant investment and installation time required for in-ground models. Understanding what these pools are made of is the first step in selecting a durable, safe, and cost-effective option for your backyard. The construction involves a combination of robust structural components and necessary chemical management systems, all designed to withstand the elements while providing years of family fun.
Primary Structural Components
The foundation of any above ground pool is its walls, which are typically constructed from one of two materials, each offering distinct advantages. Steel walls are the industry standard for durability, known for their strength and resistance to rips and punctures, although they may be prone to rust if the protective zinc coating is damaged. Alternatively, resin walls, often made from heavy-duty polyethylene, are exceptionally resistant to rust and fading, making them a low-maintenance choice for coastal or humid environments.
Resin vs. Steel Walls
When comparing resin and steel, the decision often comes down to climate and maintenance preference. Resin walls do not rust, which is a significant benefit for areas with high salt content in the air or ground moisture. Steel walls, while potentially heavier and more challenging to level, offer superior structural rigidity and are less likely to flex under the immense pressure of thousands of gallons of water, ensuring a perfectly round shape over time.
The Liner: The Watertight Skin
Perhaps the most critical component for preventing water loss is the pool liner, a flexible PVC sheet that creates the waterproof interior. This liner is stretched tight over the frame and secured to the top ledge, acting as the primary barrier between the pool water and the structural walls. Modern liners are engineered for UV resistance to prevent fading and are designed with intricate patterns that create an optical illusion of depth, making the pool appear larger than it actually is.
Types of Liner Materials
- PVC Vinyl: The most common and cost-effective option, offering good durability and a wide range of colors and patterns.
- TPU (Thermoplastic Polyurethane): A premium, ultra-durable option that is thicker, more resistant to chemicals, and features superior anti-microbial properties to inhibit algae growth.
Framework and Support Systems
The framework, often referred to as the "top rail" and "lateral uprights," forms the rigid skeleton that gives the pool its shape. These components are usually made from either steel or aluminum. Aluminum framing is lightweight, resists corrosion, and is easier to assemble, while steel framing provides a heavier, more stable base that is better suited for larger pools or areas with high wind conditions.
The Role of the Pump and Filter
No discussion of pool materials is complete without mentioning the essential mechanical systems. The pump and filter unit is typically constructed from durable thermoplastic or corrosion-resistant metal, circulating water to keep it clean and balanced. For those interested in eco-friendly maintenance, a saltwater generator can be integrated, which uses electrolysis to create chlorine from salt, reducing the need for harsh chemicals and providing a gentler swimming experience.
Accessories and Safety Features
Above ground pools often include a ladder, which is typically made from aluminum for its lightweight and rust-proof properties, ensuring safe and easy access for swimmers. Safety covers are usually constructed from heavy-duty vinyl or polyethylene, designed to support weight and protect the water from debris during the off-season. Additionally, the walls often feature coping tracks that accept a decorative stone or beadlock finish, allowing the pool to seamlessly integrate with your landscape design.
Material Comparison Table
| Component | Material | Key Benefit | Consideration |
|---|---|---|---|
| Walls | Steel | High rigidity, durable shape | Requires anti-rust coating |
| Walls | Resin (Polyethylene) | Rust-proof, low maintenance | Can flex under pressure |
| Liner | PVC Vinyl | Affordable, variety of designs | Standard durability |
| Liner | TPU | Thicker, chemical resistant, algaeζεΆ | Higher initial cost |
| Frame | Aluminum | Lightweight, corrosion-free | May bow in high water pressure |
| Frame | Steel | Heavy, highly stable | Requires assembly care to prevent rust |
