Your Tools
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Grade & Basement Calculator
Determine if your lowest floor qualifies as a basement under NBC R1-1 Zoning and VBBL 2025 with dual-unit inputs and section sketches.
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VBBL Code Assistant
AI-powered Vancouver Building By-Law and BC Building Code Part 9 compliance assistant for permit applications.
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Footing Size Calculator
Calculate minimum strip footing widths per BCBC 2024 Section 9.15.3.4 for light wood-frame buildings with the extended joist span formula.
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Roof Venting Calculator
Calculate required unobstructed vent area (NFA) per BCBC 2024 Section 9.19.1 with vent distribution and clearance requirements.
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Span Calculator
Look up maximum spans for floor joists, ceiling joists, and rafters per BCBC 2024 Tables 9.23.4.2-A through F.
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R-Value & RSI Calculator — Walls
Calculate total thermal resistance for wall assemblies with a built-in material library, preset assemblies, and image reference support.
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R-Value & RSI Calculator — Floors
Calculate total thermal resistance for floor assemblies — joist floors over unheated space, slabs on grade, and floors over garages.
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R-Value & RSI Calculator — Roofs
Calculate total thermal resistance for roof and ceiling assemblies — vented attics, cathedral ceilings, and flat roofs with tapered insulation.
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BCBC 2024 RSI Lookup by City
Search any BC location to see required minimum effective RSI for walls, rim joists, ceilings, roofs, floors, foundations and slabs per BCBC §9.36.2.6 & §9.36.2.8.
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Fire & Sound Rating Calculator
Determine required FRR and STC for walls, floors, and structural elements per BCBC 2024 §9.10 & §9.11 — with secondary-suite alarm matrix and existing-building alternate compliance.
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