South Wales Cold Water Tank Repair and Fibreglass Lining The sectional panels in this 'Braithwaite' water tank were starting to corrode and leak in places. Our client had been making patch repairs by welding steel plates over the leaks from the outside. This practise was becoming impracticable and they wanted a repair system that would last for at least the next 20 years. The tank was drained and inspected. It was found that the original factory bitumastic coating was breaking down and leaving the steel substrate exposed, ultimately causing the surfaces to corrode. Because of the condition of the tank is was decided to apply a reconstructive fibreglass lining and not a coating system. The internal walls, floor and tie bars were all keyed by sand blasting. The sand blast prep removed what was left of the original bitu coating. A specialist resin primer was applied before the repairs were made to the holed and corroded areas. These repairs were made with fibreglass and allowed to cure before the application of the full fibreglass lining system to the walls and floor surfaces. The completed cured application was top coated with a WRAS approved polyester gel flowcoat.