Vertical Termination Height Calculator
Enter an Australian address and building height. Get the site ULS wind speed (Vh,u) and the minimum external waterproofing upstand in millimetres — instead of defaulting to the 150 mm rule of thumb.
Open calculatorWaterproofing Compatibility Checker
Select two materials to see instantly whether they bond — covering bitumen, silicone, polyurethane, acrylic, PVC and polyester resin systems. Catch incompatibility before it becomes a callback.
Open checkerExternal Wall Systems Database
Compare complete external wall systems by FRL, acoustic Rw and total R-value — every figure grounded in the manufacturer design guide and linked to the exact source page. Filter by cladding type, manufacturer and insulation.
Open databaseWall Type Schedule Builder
Pick a cladding system by manufacturer to stack a scaled wall section, read off the total wall thickness and see the NCC pathway — Performance Solution or Deemed-to-Satisfy. Save wall types and export to PDF, CSV or a shareable link.
Open builderSpecification 26 Wet Area Checker
Pick the room, the floor material, the shower, the bath, the basin, the WC and the floor waste. Every floor, wall, junction and penetration that must be waterproof or water resistant, with what Specification 26, AS 3740 and the Housing Provisions each say, side by side.
Open checkerAS 3740 vs Housing Provisions
A house can be built to either rule book. Thirty-four construction items compared with the differences flagged: the recessed flange, the 25 mm step-down, hob materials, Type 1 showers, insert baths, bond breaker widths, the membrane inspection.
Open comparisonAll Excelo Calculators
Wind classification to AS 4055 from an address, steel lintel spans, AS 2870 footing sizes, BS 8102 basement grade and type, Besser retaining walls, thermal movement, the membrane database and the Performance Solution checker.
See all calculatorsF3V1a Weatherproofing Risk Score
Work through the NCC F3V1a risk factors for your facade and get a live score — with the design moves that pull it back under 20.