For homeowners considering a new pool installation, the semi inground oval pool presents a compelling compromise between the classic inground experience and the practical realities of above ground structures. Unlike fully above ground models, these pools feature a significant portion of the wall buried beneath the ground, which allows for a more seamless integration into the landscape. The oval shape, in particular, offers a timeless aesthetic that fits comfortably into a variety of yard designs, from sprawling estates to more compact suburban lots.
Understanding the Semi Inground Design
The defining characteristic of a semi inground pool lies in its hybrid construction method. While an above ground pool sits entirely on the surface, the semi inground version involves excavating a trench around the perimeter. The wall, typically made of steel, resin, or vinyl, is then set into this trench and backfilled. This process raises the wall height above ground level in the center while anchoring it securely below the surface. The result is a pool that offers the structural integrity and customizable depth of an inground pool with a significantly lower price point and faster installation time.
The Advantages of an Oval Configuration
Choosing an oval shape over a rectangular one is often driven by both aesthetics and functionality. Oval pools create a softer visual line that blends more naturally with organic garden layouts and curved property lines. They require less spatial planning than rectangles, as they do not need sharp 90-degree corners that can dominate a small backyard. Furthermore, the oval shape is renowned for its excellent water circulation patterns, which typically lead to more efficient filtration and a more comfortable swimming experience, as there are fewer stagnant corners where debris can accumulate.
Material Choices and Durability
Selecting the right wall material is crucial for the longevity and performance of a semi inground oval pool. Steel walls are the most traditional and budget-friendly option, offering robust strength but requiring vigilant rust prevention measures, especially in areas with high water tables. Resin walls represent a premium choice, as they are impervious to rust and often feature thicker polymers that resist warping and algae growth. Vinyl liner models provide the most design flexibility, allowing for custom patterns and colors, though they require periodic replacement every decade or so.
| Material | Key Benefit | Consideration |
|---|---|---|
| Steel | High strength and structural stability | Requires proper coating to prevent rust |
| Resin | Non-rusting and low maintenance | Higher initial cost compared to steel |
| Vinyl | Customizable aesthetics and patterns | liner may need replacement over time |
Installation and Site Preparation
While less invasive than a full inground pool, installing a semi inground oval pool is not a simple DIY project that involves merely dropping a frame into a hole. Proper site preparation is essential to prevent future wall collapse or wall bulge. This process begins with a detailed survey of the land to determine the frost line, which dictates how deep the wall must be buried to avoid freezing heave. Excavation requires heavy machinery to remove soil, and the walls must be braced during installation to ensure they remain perfectly plumb as the backfill is compacted layer by layer.
Landscaping and Integration
One of the most significant benefits of the semi inground design is the ability to customize the grade surrounding the pool. Homeowners can elevate the pool deck to match the height of the wall, creating a clean, modern look that resembles a traditional inground pool. Alternatively, they can slope the terrain downward to create a gradual transition from patio to grass, which is ideal for pool entry and informal lounging. This versatility allows the pool to function as a true architectural feature of the yard rather than a stark utility object.
Maintenance and Long-Term Ownership
Owning a semi inground oval pool requires a commitment to regular maintenance, though the specifics differ slightly from above ground models. Water chemistry is paramount; the larger water volume found in semi inground pools means that temperature fluctuations are less drastic, but it also means more water to treat. Wall cleaning is essential, particularly for vinyl and steel models, to prevent algae from gaining a foothold in the buried section. Investing in a high-quality cover and a reliable filtration system is critical to minimizing the time spent on upkeep and maximizing the enjoyment of the pool.
