Full drain & inspect
The tank is emptied and inspected thoroughly to locate every crack or weak point.
Problem & causes
Tank leaks often go unnoticed until the water bill or damp walls show it
Signs you have this problem
- Damp patches on walls or ceiling directly below or beside the tank
- Noticeably higher water usage without a clear reason
- Visible cracks or white salt deposits on the tank’s outer or inner wall
- A musty smell near the tank room or underground sump
Common root causes
- Cracks developing in the tank wall or base over time
- Failed waterproofing coating from the original construction
- Poor curing or low-quality material used when the tank was built
- Structural settlement causing small cracks at joints
How Gracia diagnoses
What we do differently
Potable-water-safe coating
For drinking water tanks, we use compounds specifically safe for water storage.
Crack sealing
All cracks are sealed before the waterproofing layer is applied, so the fix holds under water pressure.
Overhead & underground
We treat both rooftop overhead tanks and underground sump tanks.
Our process
Symptom to warranty
01
Symptom
Bathroom leak, ceiling stain, wall damp or terrace seepage — what you see is the starting clue, not the diagnosis.
02
Inspection
On-site visual, thermal and optical checks. We do not quote a coating from a WhatsApp photo alone.
03
Evidence
Photos with marked points, thermal or moisture notes, and the limits of what the scan can prove.
04
Diagnosis
Cause labelled Confirmed, Probable, Possible or Excluded — then the minimum opening if we still need to verify.
05
Treatment
Quoted system, preparation, exclusions and testing. Work starts only after you approve the scope.
06
Warranty
The period on the quotation and certificate — not a generic banner number.
Real case
Overhead tank seepage down the stairwell — Suchitra
Problem. Wet patch on the staircase wall under the overhead tank.
Inspection. Empty-tank visual of floor and wall joints; no thermal scan needed once the weep was visible.
Confirmed. Failed tank lining at the floor-wall joint.
Treatment. Surface prep, food-grade epoxy lining. Drilling after lining excluded from warranty.
Testing. Fill test after curing.
Warranty. Quoted 5-year tank lining. Later drilling or impact excluded.
Full case study →Testing / handover
Fill test after curing. Drinking-water tanks use a potable-safe system; later drilling through the lining is excluded.
Warranty on this treatment
Typically 5 years, treatment-specific
Structural movement, impact, or later drilling and modification of the lining are excluded.
Open the warranty matrix →Not automatically included
- Major concealed pipe replacement
- Plumbing rerouting and sanitary fixture replacement
- Electrical work
- Major structural reconstruction
Questions
Water tank — frequently asked
Most tanks need re-treatment every 3–5 years depending on usage and original material, but we check the actual condition during inspection rather than going by a fixed number.
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