Why sumps and water tanks leak
Underground sumps and overhead RCC tanks hold water 24 hours a day. Over time, cracks, poorly sealed pipe inlets and construction joints start to leak. A leaking sump loses the water you store and, when the groundwater level is high in the monsoon, can let muddy water back in. A leaking overhead tank damages the slab and the ceiling of the floor below.
Our sump and water tank waterproofing in Hyderabad repairs the structure first, then lines it with a waterproof coating suitable for storing drinking water. For overhead tanks sitting on the roof, we also check the tank base and the terrace around it, a very common source of top-floor leaks.
Signs your tank or sump is leaking
- Water level drops without useThe sump or tank empties faster than your household uses it.
- Damp ground or wall near the sumpWet patches around an underground sump or on an adjoining wall.
- Dirty or muddy waterGroundwater seeping into the sump, especially after rain.
- Leaks under an overhead tankDamp ceiling below the tank or wet patches on the terrace around its base.
- Cracks and algae insideVisible cracks, loose plaster or algae growth on the inside walls.
- Leaking pipe inletsWater leaking around the inlet, outlet or overflow pipes.
Our tank and sump waterproofing process
Drain & clean
The tank or sump is emptied, cleaned and allowed to dry enough for inspection.
Crack & joint repair
Cracks are opened and repaired; active leaks are sealed with injection grouting where needed.
Pipe inlet sealing
Joints around pipes are sealed with non-shrink grout and sealant.
Waterproof lining
A coating suitable for potable water is applied in multiple coats, with reinforced corners.
Curing & water test
The lining is cured, the tank is filled and the level is checked before handover.
Tank & sump waterproofing methods
Potable-grade cementitious coating
Flexible, cement-based lining suitable for tanks that store drinking water.
Crystalline treatment
Seals the pores of the concrete from inside; works well for underground sumps under groundwater pressure.
Injection grouting
Stops active leaks through cracks and joints before the lining is applied.
Tank base & terrace sealing
Sealing where an overhead tank meets the roof slab, to protect the ceiling below.
Our water tank & sump waterproofing work in Hyderabad
Why choose Ganga Waterproofing
- We find the cause, not the symptom. Every job starts with a free inspection to trace the water to where it actually gets in.
- Branded materials, named on your quote. You see exactly which product will be used and how much of it.
- Our own trained crew. The same team starts and finishes your job, and cleans up each evening.
- Written warranty and post-monsoon follow-up. We check back after the first heavy rain.
Read what customers say in our Google reviews, or see recent projects.
Water tank & sump waterproofing across Hyderabad & Secunderabad
We provide water tank & sump waterproofing in all parts of Hyderabad and Secunderabad, including:
Water Tank & Sump Waterproofing: frequently asked questions
Yes. For tanks and sumps that store drinking water we use coatings meant for potable water, and allow the full curing time before the tank is filled and used.
Usually 3 to 5 days for drain, repair, coating and curing. We plan the work with you so you can arrange storage in the meantime.
Yes. In most cases the sump is repaired and lined from the inside. Rebuilding is only needed if the structure has failed badly.
Yes, both underground sumps and overhead RCC water tanks, including the base where the tank sits on the roof.