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Basic Liner Pool Construction

Knowing how a liner pool is constructed can be very helpful in understanding what is going on "behind the scene", as well as setting a standard for what a good renovation is always trying to achieve. Toward that end, we've documented a new pool construction and offer here some of the shots taken along the way.

A liner pool's basic "buried" component is a retaining wall to keep the dirt out, which also is a 'wall' to stand up against the water's pressure. And for an in-ground liner pool, that wall is placed in the ground, preferrably on "undisturbed soil" since disturbed soil will settle causing an uneven wall.  To accomplish this, excavation is performed only to the specifications of the pools predetermined dimensions. Then once the excavation is completed, the walls can be placed and secured.

Most pools start with that retaining wall fabricated from galvanized steel, but pool walls have also been made from poured concrete or concrete block, fiberglass or structural plastic ("polymer"), and various kinds of wood (redwood or pressure treated; plywood or boards).  An ideal addition at this point is to include a "step section", a portion of the wall that is a prefabricated set of steps to allow for easier entry into the pool.  Other amenities that can be included at this time might be 'wall ladders', 'swim outs', or attached spas.  Once the wall structure is set on the ground and temporarily held in place, it is then anchored around the outside perimeter with a 'footing' of concrete which is called the "bond beam".

Once the walls are in place and secured, the fittings (skimmer, returns, etc.) can then be mounted on the walls and the plumbing can be routed from each fixture back to the future site for the pool equipment.  [**Sufficient fixtures and piping in both number and sizing is essential to properly handle the water, so be sure not to skimp here.]  This will also be the time for the electrician installs the pool light. Then the outside of the walls can be back-filled and prepared for the deck. 

Most commonly the decking is initiated at this point, but other excellent builders might suggest you choose to leave the decking until the end of the project; both approaches have their strengths and weaknesses.

Finally comes the completion of the interior of the pool, preparing for and placing the 'water wall' (the liner).  Originally, liner pool floors only had the options of being made of packed sand or poured concrete, but floors now are most commonly overlaid with 2"+/- of some form of cementatious  material, such as the traditional 'sand and cement' or the newer vermiculite based products.  These are troweled to the pre-determined dimensions of the liner, and usually harden within 24 hours.

Once the floor is prepared, then the liner can be positioned and the pool filled with water.

Today's pools have so many new options and features for you, far more possibilities than can be covered here and which are beyond the purpose of this introduction.  So be sure to choose a knowledgeable contractor who will safely guide you through all the important considerations.

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