Interior Wooden Door

Material Composition Assumptions

The default interior wooden door model assumes a composite construction weighing approximately 20 kilograms. The door core consists primarily of particleboard or medium-density fiberboard (12 kg, 60%), bound together with urea formaldehyde adhesive (0.8 kg, 4%). The structural frame uses solid wood veneer or sawn lumber (4 kg, 20%), while laminated veneer lumber provides additional reinforcement (1.5 kg, 7.5%). Surface treatments include decorative paper or PVC coating (0.9 kg, 4.5%) and protective wood stain or polyurethane finish (0.8 kg, 4%).

Manufacturing Geography

Interior wooden doors are primarily manufactured in China, which accounts for the largest share of global production due to established wood processing infrastructure and access to both domestic and imported timber resources. The manufacturing region uses an electricity grid with carbon intensity of 555 gCO2/kWh, reflecting China’s coal-heavy energy mix. This grid intensity significantly influences the carbon footprint of energy-intensive processes like particleboard manufacturing and adhesive production, though the overall manufacturing stage represents a relatively small portion of total emissions.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China	555 gCO2/kWh	42	Baseline
Canada	120 gCO2/kWh	36	-14% (hydroelectric power)
Germany	310 gCO2/kWh	39	-7% (mixed renewables)
Poland	640 gCO2/kWh	44	+5% (coal-heavy grid)
Brazil	85 gCO2/kWh	34	-19% (hydroelectric dominance)

Provenance Override Guidance

1. Submit detailed material composition data showing actual percentages of solid wood versus engineered wood products, including specific adhesive types and quantities used in core construction.

2. Provide transportation distance documentation for raw timber sourcing, including whether wood originates from local forests or requires international shipping from distant suppliers.

3. Supply manufacturing facility energy consumption records with specific electricity grid mix data or renewable energy certificates that demonstrate lower-carbon power sources.

4. Document adhesive formulation specifications, particularly for formaldehyde-free alternatives or bio-based binding agents that reduce chemical processing impacts.

5. Furnish end-of-life management plans showing recycling partnerships or waste-to-energy arrangements that avoid landfill disposal of wood components.

Methodology Notes

• The CCI score represents cradle-to-grave emissions for a standard residential interior door including material extraction, manufacturing, distribution, and end-of-life disposal
• Scope 3 dominance reflects the carbon-intensive nature of particleboard production and the significant transportation distances for raw materials and finished products
• Functional unit assumes a typical hollow-core door with 80-inch height and 36-inch width serving a 50-year service life
• Biogenic carbon storage benefits are excluded from the baseline score but could result in negative emissions for solid wood alternatives
• Hardware components such as hinges, handles, and locks are excluded from the assessment boundary
• Regional manufacturing variations primarily reflect electricity grid differences rather than technological or material substitutions