Converting a concrete pool to liner swimming pool is no mean feat. However for us at Osprey Pools, it’s just another day at the office…
Concrete swimming pools are notorious for taking too long to construct, not because of the actual construction, but because of the many drying and curing times at the different stages of construction
“What has this got to do with converting a concrete pool to a liner pool?”
Let me explain. Here’s the boring technical stuff.
At each stage of construction there are important waiting times:
- Cement setting times
- Drying out
- Curing times
- For the overall pool structure to gain strength over a certain time period.
Example: A swimming pool the size of 16ft X 32ft
3ft 4inches depth in the shallow end and 5ft 6inches in the deep end has a tremendous weight of water alone, of around 60 tonne.
60 tonne of water is a lot of pressure pushing against the floor and the side walls of a swimming pool.
The individual constructions stages for example
- The concrete floor
- The concrete in the cavity wall
- The block walling that acts as a form of shuttering for the concrete
- Then there’s rendering
- Floor screeding
- The wall, floor tiling and grouting finishing stage.
- Believe it or not, it will take several days to fill up the swimming pool with water
So each time there is “cement or cement based products” involved, there are long waiting times before proceeding on to each construction stage.
All these waiting time should be rigidly adhered too Failure to do so can seriously compromise the strength and water resistant integrity of the swimming pool.
Why do concrete pools leak?
Water will always try to find a way to escape from any “waterproof” container (in this case a swimming pool). If there is the slightest gap in the concrete where the concrete comes to an intersection or the concrete has not filled or been vibrated correctly the odds are on that eventually the concrete pool will leak
There are several other reasons for the failure of a pool to hold water:
- One, is cutting corners to finish the pool on time
- leading to poor construction or:
- Inferior or flawed design.
- Draining the water from the swimming pool incorrectly.
- Thermal shock
- Inexperienced “do it yourself” installation
- Deterioration of the pool shells material make up
- Poor workmanship
- Wrongly relying on the finishes to waterproof the swimming pool
Concrete pools leak through:
- Subsidence through poor subsoil
- Inadequate foundations
- Expansion and contraction of the pools structure
- Insufficient bonding of concrete intersections
- Ineffective sealing around the swimming pools fittings
There are other more technical reasons why concrete swimming pools fail and leak (most Investigating and detecting leaks in a swimming pools skimmer of the reasons are above) so I won’t delve into these, but suffice to say you get the general picture as to why, potentially; there can be so many problem with concrete pools if they are not constructed correctly.
There are other more technical reasons why concrete swimming pools fail and leak (most Investigating and detecting leaks in a swimming pools skimmer of the reasons are above) so I will not delve into these, but suffice to say you get the general picture as to why, potentially; there can be so many problems with concrete pools if they are not constructed correctly.
Some swimming pool installers will attempt to repair the concrete pool, and sometimes waterproof and repairing the leaking swimming pool, but there is a risk that the pool will begin to leak once again.
Water will take every opportunity to escape from any swimming pool and if the repair to the pool is not 100% right, water will still find a way out of the structure and a disgruntled and unhappy pool owner will be back to square one worrying about more costs to put the pool right.
My advice would be, do not take chances on pool repairs, it is not worth it. You may be throwing good money away. What the alternative? I suggest a pool conversion to a liner pool. You may be shocked with this option as it’s a top of the range concrete swimming pool that is being downgraded to a liner pool!
There are several words to say about concrete/masonry structures of all types from skyscrapers, small houses to swimming pools “They are very heavy and they all move” A new house will move and settle in the first few years of being constructed. A swimming pool and the water contained in particular is very heavy (as mentioned above) a swimming pool of 16ft x 32ftx 4.5ft (average depth), the water alone weighs in excess of 60 tons, so imagine the weight of 60 tons pressing down on a pool shell, and you can see how this may have an effect on the swimming pools structure over time. Remember too that with this there is “ground movement” continuous expansion and contraction and although this can be small it can still have an affect on the pool shell
A concrete pool conversion to a liner pool can easily be done by an expert swimming pool installer (Like me) I cover most regions including Bristol Swansea and Cardiff Gloucester Wiltshire Somerset and London
I’ll finish up on this part of the article “Your concrete pool leaks, changing it to a liner pool and continue with part II later on, but in the meantime if you need information on the various ideas and options to choose you know where I am located which is between Chepstow Raglan Ross Monmouth and close to Gloucester and not that far from Surrey Kent Essex and London.
Here’s the link for pool liners, for more information…