During work to prepare the Tollcross International Swimming Centre (TISC) in Glasgow workers found that part of the screed beneath the tiles had separated from the concrete pool tank.
Glasgow Life, which runs the pool, said there is no immediate risk to events this year.
However a repair to the pool will eventually be needed and officials have decided to take the opportunity to replace the screed and tiles while work is being carried out.
Ian Hooper, the director of sport and special projects at Glasgow Life, said: "We want our facilities to look at their absolute best during the Games and having a newly tiled competition pool will see Tollcross shine. By completing this work now, while contractors are on site, we will also avoid having to close the pool at a future date, which helps to minimise disruption.
"The new six-lane 50-metre warm-up pool, the 25-metre teaching pool and the rest of the facility will remain open to the public throughout."
It is expected that the work to retile the pool will be completed by late March.
The preparatory work being carried out includes installing new spectator seating and strengthening the roof of the building.
In July the centre was forced to close as torrential rain caused problems with the drainage system.
Operators of the centre worked with architects and contractors to fix the problem and it was reopened the next day.
The TISC is one of the biggest facilities of its kind in Europe after the warm-up pool was added to the site while the 10-lane 50-metre competition pool received a makeover.