▽ +09.00Engineering Hub · Calculator

Liquid waterproofing calculator

Work out the quantity of a liquid-applied membrane (PU, polyurea, cementitious, crystalline…) in kilograms and pails from the TDS consumption.

Inputs

The values shown are an illustrative example, not product data; replace them with your project values and the approved TDS.

Area

m²

The net area to be treated, without waste.

Consumption per coat

kg/m²

From the TDS of the approved product.

Number of coats

As the approved specification requires.

Waste

An allowance for cuts, overlaps, details and site losses.

Pail size

The net weight of one pail or kit.

Pails10 pails

Results

Result of the example values

Total consumption per m²: 1.50 kg/m²
Net quantity: 180.0 kg
Waste: 18.0 kg
Total quantity: 198.0 kg
Pails: 10 pails
Quantity supplied: 200 kg

Estimate only — final quantities depend on the approved specification, the product TDS and a site survey. No prices are given.

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+01.00Formulas

How it is calculated

Consumption per m² = consumption per coat × coats
Total = area × consumption per m² × (1 + waste %)
Pails = round up [ total ÷ pail size ]

QQuestions

Questions clients ask

How do I work out a liquid waterproofing quantity?

Quantity = area × consumption per m² per coat × the number of coats needed for the required dry film thickness, plus a waste allowance, divided by the pack size. The consumption comes from the product data sheet.