Homestar Technical Clarification Rulings
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| Technical Question Title | Tool Version | Date Released | Credit Name | Tool Category | TC Link |
|---|---|---|---|---|---|
| TQ204 Embodied Carbon Guidance | v5 | October 2023 | EN2 - Embodied Carbon | EN | Link |
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Approved Ruling: This is a broad guide for what to include when accounting for (custom) materials in the Homestar Embodied Carbon Calculator (HECC). When all materials in the “must include” section are included, it is estimated that 95% of the total embodied carbon for the most common construction assemblies in New Zealand will be accounted for. Must Include Walls : Cladding Structural framing Internal linings (e.g., GIB) External paint (e.g., applied to weatherboards, if included) Internal paint Cavity Battens Insulation Roofs: Cladding Structural framing Ceiling lining Internal paint Insulation Purlins Suspended Timber Floors: Flooring Structural framing (joists, bearers, piles) Pile footings Subfloor linings. Insulation Concrete Slabs: Concrete (slab and footings) Reinforcing steel Basecourse/fill Underslab insulation (e.g., EPS) Edge protection Membranes (e.g., DPC) May Exclude : Internal paint applied to cornice and skirting. Exterior primer Cornice Interior primer Cavity vent strips Building wrap Skirting Fixing straps Adhesives Fixings Interior primer Building wrap Adhesives Fixings Membranes Adhesives Fixings Sand blinding Flashings Edge insulation Formwork Accessories to slab (e.g., bar chairs, wire) Adhesives |
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