Why This Matters
Embodied carbon refers to the greenhouse gas emissions associated with building materials across their lifecycle, including raw material extraction, manufacturing, transportation, construction, and eventual disposal. Even in high-performance, energy efficient buildings, embodied carbon still accounts for 40–70% of total lifecycle emissions.
The good news: Smart material choices can reduce embodied carbon by 20–50%
in many projects, often with little or no cost premium.
This guide focuses on materials commonly used in Kamloops and highlights lowcarbon alternatives that are available today.
⭐⭐⭐⭐= Very Low | ⭐⭐⭐= Low | ⭐⭐= Moderate | 🔺= Use Sparingly | ❌= High/Avoid Where Possible
Insulation (High Impact, Easy Wins)
| Material | Carbon Signal | Notes |
|---|---|---|
| Cellulose (blown or dense-pack) | ⭐⭐⭐⭐ | Locally available, recycled content |
| Mineral wool | ⭐⭐⭐ | Fire-resistant, higher manufacturing energy |
| Fiberglass batts | ⭐⭐ | Familiar install, moderate embodied carbon |
| Expanded polystyrene (EPS) rigid foam | ⭐⭐ | Lower than XPS, use sparingly |
| Extruded polystyrene (XPS) rigid foam | ❌ | Avoid where possible (traditionally produced with high global warming potential blowing agents). |
| Spray foam (hydrofluorocarbon based) | ❌ | Only use where no alternative exists |
Kamloops Takeaway: Switching from XPS rigid foam or spray foam to cellulose or EPS rigid foam can cut insulation-related embodied carbon by 50–80%.
Structure and Framing
| Material | Carbon Signal | Notes |
|---|---|---|
| Optimized framing (advanced framing) | ⭐⭐⭐⭐ | Less material, same performance |
| Conventional wood framing | ⭐⭐⭐ | British Columbia wood performs well |
| Steel framing | ❌ | High manufacturing emissions |
| Concrete (baseline mixes) | ❌ | Major carbon hotspot |
Kamloops Takeaway: Material efficiency matters. Using less material and producing less waste often delivers bigger carbon savings than switching materials.
Concrete (Biggest Carbon Hotspot)
| Material | Carbon Signal | Notes |
|---|---|---|
| Right-sizing foundations | ⭐⭐⭐⭐ | Design choice drives biggest savings |
| Low-carbon concrete mixes (supplementary cementitious materials—slag, fly ash) | ⭐⭐⭐ | Widely available in British Columbia. Performs comparably to standard concrete in most structural applications when properly specified. |
| Standard concrete | ❌ | Default mixes are carbon-intensive |
Kamloops Takeaway: Asking for low-carbon concrete at design stage is one of the highest-impact actions builders can take.
Cladding and Exterior Finishes
| Material | Carbon Signal | Notes |
|---|---|---|
| Wood siding | ⭐⭐⭐ | Local supply chain |
| Fiber-cement | 🔺 | Durable but energy intensive |
| Vinyl siding | 🔺 | Fossil fuel based |
| Brick/stone veneer | ❌ | High transport, manufacturing emissions |
| Aluminum cladding | ❌ | Extremely energy intensive |
Kamloops Takeaway: The challenge of balancing carbon reduction and wildfire resilience objectives requires careful design, material combinations, and site-specific fire-smart practices.
Interior Finishes
| Material | Carbon Signal | Notes |
|---|---|---|
| Low-carbon/recycled gypsum | ⭐⭐⭐ | Available from some local suppliers |
| Hardwood flooring | ⭐⭐⭐ | Long lifespan |
| Gypsum board (standard drywall) | ⭐⭐ | Significant volume matters |
| Luxury vinyl plank (LVP) | ❌ | Petrochemical based |
| Carpet (synthetic, petroleum-based) | ❌ | High embodied, short lifespan |
Bottom Line
Low-carbon construction doesn’t mean exotic materials. It means builders, designers, and suppliers working together to make smart material choices using products you already know, and aiming to reduce construction waste.
