What are you waterproofing?
Consumption varies by surface — a terrace needs more material per sq.ft than an interior wall.
What's the condition of the surface?
How large is the surface?
Common Questions
Does this include labour?▾
No — this calculator estimates waterproofing material only. For an estimate that includes application labour, use the Painting Cost calculator or request a quote for your specific site.
Why does a repair job need more material?▾
Existing damage — cracks, blistering, previously failed coatings — absorbs more material and usually needs extra sealing before the main system goes on. A standard allowance is added on top of the base consumption for repair and renovation work.
Which surface should I pick?▾
Choose the one closest to what you're treating. Consumption differs meaningfully between them: a terrace takes considerably more material per square foot than an interior wall, because it faces standing water and direct sun.
How do I measure a terrace or roof?▾
Measure the flat surface area you intend to coat (length × width). If you're also treating the parapet or upstand around the edges, add that wall area too — those junctions are where leaks most commonly start.
Other Planning Tools
Estimates are indicative and may vary based on surface condition, application method, site conditions, wastage, labour requirements and current product pricing. Figures used here are generic industry-standard estimates pending confirmed Colorsome rates.