Whats the difference between an inground pool and an above ground pool?

People often confuse above ground pools which have been installed in the ground with inground swimming pools - and it's no wonder, as its a really silly term - given that you can install an above ground pool above the ground, partially in the ground, and even completely in the ground!

Generally speaking, an 'above ground pool' uses a steel wall (usually corrugated to add strength) and a base channel and side supports and top deck in either metal or plastic.

The floor is usually compacted sand to offer a smooth and stone free surface. This type of structure relies on the water pressure from inside the pool for support and the PVC Lining to hold the water.

an above ground pool which has been fully decked in

Without the liner, they don’t hold water. The coping or deck around the top was always colour bond steel, but since about 2005 has been available in moulded or extruded plastic.

The steel top copings are usually straight sections, whereas the plastic copings can be made curved to match the shape of the pool.

Sometimes the coping can be hidden under timber decking, or under paving stones and ornamental rocks etc - which makes it even harder to tell the difference, such as these pools. This above ground pool has been fully decked in using our waterline extrusion.

All above ground pools must use a liner to hold water. You cannot tile, paint or fibreglass an above ground pool.

Inground pools can be made from any solid material suitable for burying in the ground.

They can be concrete, brick, concrete block, treated timber, marine ply, fibro planks and sheets, fibreglass, corrosion protected steel, fibreglass and aluminium. The concrete pools can be formed concrete, sprayed concrete or concrete panels.

The brick, block and panel pools will usually have a concrete floor, but some older type pools with aluminium panels or steel panels only had sand or sand/cement floors.

The reason is, the engineering of the pool did not require the floor to support the pool wall structure, so the floor was only cosmetic and provided it was smooth, could be formed from compacted sand or a sand/cement mix.

Fully moulded one piece fibreglass shells are very popular for inground pools as well.

All inground pool types can be finished with an inground pool liner - the liner is simply a flexible alternative to paint, tiles, pebble etc.

Read more from our Pool of Thoughts at http://www.abgal.com.au/blog/