Pool leak repair and waterproofing

Finding where your pool is losing water

Before breaking any tiles or concrete, we inspect the pool, balance tank and plant room to establish whether water is escaping through the shell, the fittings, the overflow or the buried pipework. Tracing the real cause first prevents unnecessary strip-out work.

• Evaporation versus leak comparisons and water-level drop checks
• Dye testing around underwater light niches, skimmers, main drains and return fittings
• Pressure testing of suction, return, jet and drain lines
• Checking overflow weir levels where rendering has raised water into the terrace joint
• Inspecting underground balance tanks and pump rooms for seepage

How we repair shell, pipe and balance tank leaks

Once the fault is confirmed, we carry out the repair that matches the problem. A leaking light conduit or too-high overflow lip can sometimes be fixed by lowering the water level, whereas floor pipes, construction joints and full shell waterproofing require the pool or tank to be drained and dried.

• Cutting out and relaying parted or leaking pipes beneath the pool floor
• Resealing leaking underwater light housings, cable glands and wall conduits
• Lowering and re-profiling overflow edges where water escapes beneath the deck
• Repairs to shell cracks and leaking floor-to-wall joints
• Tank-in-tank rebuild: a new balance tank formed inside a leaking old one, where suitable

Waterproofing for pools, tanks, ponds and pump rooms

We apply multi-coat waterproofing systems matched to each wet structure. Rigid and flexible coatings protect concrete pool shells and water features before rendering and finishing in tile or PebbleCrete.

For underground pump rooms where groundwater presses in from outside, we apply negative-side waterproofing to the internal walls and floor. For reflection ponds, koi ponds and domestic water storage tanks, we use UV-stable tank coatings that can also be pigmented as a direct pond finish. The programme is agreed for the individual project.

What to send for a first discussion

Send us the information below so we can review the symptoms, plan an inspection and prepare a quotation.

• Photos of the pool, overflow channel, balance tank, water feature or pump room
• Your villa, hotel or resort location in Phuket or southern Thailand
• The approximate pool size and how much the water level drops when the pump is on or off
• Any damp patches, hollow tiles or past repairs you have noticed