Waterproofing Estimator
Membrane, coating and chemical quantity for roofs, basements and toilets.
Inputs
Results
Enter your values, then press Calculate Now to evaluate the output.
Guide — Waterproofing Estimator
The waterproofing calculator below follows standard Indian construction practice and the relevant IS-code conventions. Enter the site dimensions exactly as measured, press Calculate Now, then refine the quantities line by line in the live sheet before you export.
Measure the treatment area including the vertical upturn at parapets and around drains — usually 300 mm minimum, and 150 mm above the finished floor level in wet areas. Skipping the upturn is the most common cause of early failure.
Torch-applied APP membranes need a 15% allowance for side and end laps. Liquid-applied acrylic or PU systems are quantified by consumption: roughly 1.5 kg/m² over two coats for a 1 mm dry film.
Always include surface preparation and a fillet at every wall-slab junction in the rate, and specify a 24-hour ponding test before the protective screed is laid.
Treat every output as an indicative pre-tender estimate. Site conditions, wastage allowances, specification changes and local market rates all move the final figure, so validate against your drawings and approved rate analysis before procurement.
Master Measurement Sheet
| Sr. No. | Description | Unit | NOS 1 | NOS 2 | L | B | D | QTY | Action |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.000 |
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About the Waterproofing Estimator
This tool is built for site engineers, quantity surveyors, contractors and property investors who need dependable numbers fast. Every input is reactive — changing a single field instantly recomputes the full output set, so you can run sensitivity checks on dimensions, grades and rates before committing to an estimate.
Keep unit consistency in mind: metric inputs (metres, square metres, cubic metres) produce metric outputs, with imperial and Indian trade units shown alongside where they are commonly used on site.