Standards-compliant calculators for waterproofing contractors in NZ & Australia. Free, no signup required. Works on mobile.
Check IRD for your bracket.
10–20% is typical for a sole trader.
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Waterproofing membrane product quantity. Multi-coat systems, container count. NZS 4858 / AS 3740.
Height differential, slope % and screed thickness for 1:80, 1:60 and 1:40 drain falls.