Enclosures come in a number of different forms with the most popular being a sectional telescopic canopy. With this type of structure several sections telescope out to cover the pool during cooler weather and retract to leave the area uncovered during warmer days. These canopies can be motorised or opened manually and slide on runners.
All sections are made of a toughened glass or a "Perspex like" material which is held in a lightweight frame that slides over the pool's perimeter. The height of the canopy is usually sufficient for someone to walk under without stooping and most models will have manually adjustable ventilation openings.
swimming pool covers offers maximum versatility and it can even be positioned in a half open and half closed state.
More permanent (non-retractable) enclosures are also available, but these are classified as permanent structures and, depending upon local laws, may require a planning permit.
These structures are usually referred to as "pool houses" and they can be built of brick or stone, but with a wall and roof area that is predominantly made of glass. This type of structure has a considerably greater cost than its telescopic counterpart and it has the effect of converting an outdoor pool into an indoor one. These glasshouses can be simple or elaborate and they can encompass an area that allows for a patio area and the inclusion of heating and/or air conditioning.
The Affordable Option
At the opposite end of the scale there are inflatable bubble enclosures that are tied or weighted down over the swimming pool.
These bubbles use an air pump that inflates them so that they encapsulate the swimming zone and create a bubble of warm air around and above it. This makes swimming conditions much more pleasurable on cool days, however these "bubbles" are not suitable for windy days and therefore they do have some limitations.