Waterproofing is scoped everywhere water goes
Why — act while you have leverage
Waterproofing is the most commonly missing item in Kerala quotations, and the one whose absence you discover in the first monsoon after moving in. Partial cover is nearly as bad: several quotes waterproofed upstairs bathrooms and not the ground-floor ones.
What to look at
- Every bathroom listed, not just the ones upstairs
- Terrace or flat roof named separately from the slab
- A damp-proof course at plinth level
- Coats stated, and an area - not a bare rate with no surface named
How to check it yourself
Name every wet surface and find each in the quote: every bathroom floor and wall skirting, the terrace or flat roof, the plinth damp-proof course, and any sunshade or parapet junction. A waterproofing admixture in the concrete is not a waterproofing system - the system is a membrane or coating over a prepared surface, with a stated number of coats.
Where this comes from: NBC 2016 Part 9 for wet areas; IS 2645 for waterproofing admixtures (indian standard or building code)
More construction quotation and boq checks
- Identical tender pack sent to 2+ contractors
- Quote comparison and conflicts pass done
- Negotiation round held on the comparison verdicts
- Grades and thicknesses are written down, not just brands
- How the work will be measured is agreed before it is priced
- The things you cannot occupy without are in the price
- The electrical safety layer is named, not assumed
- What the quote leaves out, in writing