Brick Bat Coba Cost in Mumbai
Brick bat coba is priced per square foot and is generally the most economical full terrace system in Mumbai for buildings whose slabs can carry the dead load. Where quotes diverge is thickness, curing period and finish — the three things least visible at handover.
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.
- Thickness laid
- Coba at 75 mm and coba at 115 mm are different quantities of material and labour, and both get called 'coba' on a quotation.
- Removal of existing
- Stripping old coba is heavy work with substantial debris.
- Curing period
- Fourteen to twenty-one days of water curing is site time, supervision and water. It is the single most common place a cheap quote saves money.
- Finish selected
- China mosaic, IPS or Shahabad differ materially in both cost and labour.
- Fall requirement
- Where fall has to be built into the coba thickness, the average depth and therefore the material quantity rises.
What a quotation should and should not include
Normally included
- Slab preparation and crack treatment
- Waterproof cement slurry bond coat
- Soaked brick bats in waterproofed mortar to specified thickness
- Laying to fall and consolidation
- Full water curing period
- Finish layer
Normally excluded
- Structural repair to the slab
- Parapet repair and coping
- Rainwater goods replacement
- Debris disposal charges levied by the society
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 stated thickness anywhere on the quotation
- A curing period of under fourteen days
- No bond coat line item
- Coba proposed over an existing hollow coba rather than a stripped slab
- No structural check where dead load is being added
What brick bat coba waterproofing involves
Brick bat coba is the traditional Indian terrace system: broken brick pieces bedded in waterproofed cement mortar, laid to a fall and finished with china mosaic or IPS. It does three jobs at once — it creates the slope, it insulates the slab against Mumbai heat, and it forms a thick, forgiving water barrier. It remains the default for society terraces because it is repairable and long-lived.
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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. Coba at 75 mm and coba at 115 mm are different quantities of material and labour, and both get called 'coba' on a quotation. 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.
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