Water Tank Waterproofing Cost in Mumbai
Tank lining is priced per square foot of internal surface, and for potable storage the certification requirement sets a floor on material cost. A quotation noticeably below the rest of the market for a drinking-water tank usually means an uncertified product.
To be confirmed
We have chosen not to publish a figure we cannot stand behind for your specific building. What follows is more useful anyway: what actually moves the number, and how to compare two quotations honestly.
What actually moves the number
In rough order of how much they typically matter.
- Potable certification
- Certified potable-contact linings cost more than general-purpose coatings, and this is not a place to economise.
- Internal surface area
- Walls, base and any internal baffles, not the plan area.
- Cleaning and preparation
- Removing old lining and scale from a confined space is slow work.
- Access and confined space
- Small hatches and confined-space procedures affect productivity substantially.
- Structural repair
- Cracks and wall-to-base junction treatment where the tank is already failing.
- Out-of-service period
- Cure time before refilling has to be planned around the building's water supply.
What a quotation should and should not include
Normally included
- Draining, cleaning and disinfection
- Crack treatment and junction fillets
- Certified potable lining to specified thickness
- Full cure period
- Fill test
- Flushing before return to service
- Certification handover
Normally excluded
- Alternative water supply during the works
- Plumbing and valve replacement
- External structural repair to the supporting slab
- Water testing by a third-party laboratory
Warning signs in a cheap quotation
None of these prove bad faith. All of them mean the two quotations in front of you are not for the same work.
- No potable certification named for a drinking-water tank
- A cure period shorter than the manufacturer's stated minimum
- No fill test before handover
- The tank returned to service the same day it is lined
What overhead water tank (ohwt) waterproofing involves
Overhead water tank waterproofing lines the internal faces of an elevated potable-water tank with a non-toxic, water-resistant system, and treats the external faces and base where leakage tracks into the structure below. Because the water is for drinking, the internal lining must be a food-grade, potable-water-safe product — not a general-purpose coating.
Full specification, method and materials →Related cost guides
- Terrace Waterproofing Cost in Mumbai
- Basement Waterproofing Cost in Mumbai
- Bathroom Waterproofing Cost in Mumbai
- Brick Bat Coba Cost in Mumbai
- China Mosaic Waterproofing Cost in Mumbai
- APP Membrane Waterproofing Cost in Mumbai
- SBS Membrane Waterproofing Cost in Mumbai
- Polyurea Waterproofing Cost in Mumbai
- PU Grouting Cost in Mumbai
- Injection Grouting Cost in Mumbai
- Podium Waterproofing Cost in Mumbai
- Underground Tank Waterproofing Cost in Mumbai
Cost — questions we get asked
Why will you not publish a rate for this?
Because a rate quoted without seeing the building is either meaningless or misleading. The condition of the existing structure changes the number more than anything else, and it cannot be assessed over the phone. We publish what drives the cost instead, so you can interrogate any quotation — including ours.
What makes two quotations for the same job differ so much?
Almost always the invisible work. Certified potable-contact linings cost more than general-purpose coatings, and this is not a place to economise. Beyond that, the items most often trimmed are preparation, curing time and testing — none of which are visible at handover and all of which decide whether the system lasts.
What should I check before accepting a quotation?
That it states thickness, curing period, junction and penetration detailing, and what testing is carried out before anything is covered. A quotation that omits all four is not comparable to one that states them, whatever the headline rate says.
Is the site inspection chargeable?
No. The inspection and the itemised scope that follows are free and carry no obligation. You are free to take that scope to any contractor.
Get an itemised quotation you can actually compare
An engineer visits, establishes the real condition, and gives you a rate-wise scope. A housing society committee can put it line by line to a general body meeting.
Mon–Fri 08:00–18:00 · Sat 09:00–16:00 · Jogeshwari West