Accounting for Whole Life Cycle

Accounting for Whole Life Cycle

To ensure that the global expansion of timber construction reduces – rather than accelerates – climate and environmental harm, we must consider the whole life cycle of every project. Carrying out comprehensive whole-life carbon assessments establishes the foundation for responsible timber construction by enabling accountability, driving innovation, and ensuring that scaling bio-based materials strengthens forests and communities. However, the industry must close data gaps, standardise assessment methods, and expand professional training to align timber’s growing role with genuine climate performance and wider environmental integrity.

Actions for Accounting for Whole Life Cycle

Phase 1 Strategy 1.1 Designers

Embed carbon benchmarks into conceptual design tools and cost models

Sub-action

Use early-stage carbon assessments and benchmarked carbon data to inform material choices, structural systems, and building geometry for optimum embodied emissions performance.

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 1 Strategy 1.1 Cities & Policymakers

Embed upfront and whole-life carbon thresholds into public project procurement

Tools and Guidance
Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 1 Strategy 1.1 Cities & Policymakers

Require preliminary sourcing plans and certification compliance as part of planning submissions

Principles included in this strategy
  • Accounting for Whole Life Cycle
Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 1 Strategy 1.1 Developers Designers

Integrate embodied carbon calculations into early project briefs, feasibility studies and cost modelling tools

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 1 Strategy 1.1 Investors & Asset Owners

Link financing to compliance with carbon benchmarks or net-zero pathways projects achieving verified reductions in embodied emissions, and compliance with recognised net-zero benchmarks

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 1 Strategy 1.1 Investors & Asset Owners

Make lifecycle carbon integral to the investment decision

Sub-action

Require LCA and disaggregated carbon data (biogenic vs fossil) as part of early due diligence.

Principles included in this strategy
  • Accounting for Whole Life Cycle
Principles included in this strategy
  • Accounting for Whole Life Cycle
Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 2 Strategy 2.1 Cities & Policymakers

Embed low-carbon material thresholds into building codes, regulations and permitting for applicable building types

Principles included in this strategy
  • Extending the life of existing buildings
  • Accounting for Whole Life Cycle

Phase 2 Strategy 2.1 Developers

Engage structural engineers and suppliers early to determine feasible spans, grids and fire/acoustic strategies for timber; align building layout with timber panel or beam sizes to reduce waste

Principles included in this strategy
  • Extending the life of existing buildings
  • Accounting for Whole Life Cycle

Phase 2 Strategy 2.1 Designers

Commit to a timber option or timber-hybrid systems in concept design, considering key early decisions (construction type, fire resistance ratings, spans and grid, acoustic performance and MEP integration). Avoid later “timber swaps” that may compromise efficiency

Principles included in this strategy
  • Extending the life of existing buildings
  • Accounting for Whole Life Cycle

Phase 2 Strategy 2.3 Designers

Select species and systems based on carbon intensity and durability

Tools and Guidance
Principles included in this strategy
  • Accounting for Whole Life Cycle
  • Ensuring sustainable forest management

Phase 2 Strategy 2.3 Designers

Smart specs and sourcing certifications

Sub-action

Specify traceable, sustainably managed timber with recognised Environmental Product Declarations (EPDs) and sustainable forest management (SFM) certifications in all spec packages.

Principles included in this strategy
  • Accounting for Whole Life Cycle
  • Ensuring sustainable forest management

Phase 2 Strategy 2.5 Developers

Commission climate-risk and resilience studies at project inception (e.g. expected temperature and moisture extremes, flood risk, pest threats) and integrate findings into design briefs

Principles included in this strategy
  • Accounting for Whole Life Cycle
  • Maximising the carbon storage potential of wood
  • Promoting a timber building bioeconomy

Phase 2 Strategy 2.5 Designers

Incorporate moisture control, protective detailing, and replaceable layers to safeguard durability

Principles included in this strategy
  • Accounting for Whole Life Cycle
  • Maximising the carbon storage potential of wood
  • Promoting a timber building bioeconomy

Phase 2 Strategy 2.5 Developers

Moisture management must be planned to prevent water ingress during construction and operation

Principles included in this strategy
  • Accounting for Whole Life Cycle
  • Maximising the carbon storage potential of wood
  • Promoting a timber building bioeconomy

Phase 2 Strategy 2.5 Cities & Policymakers

Provide up-to-date climate data and resilience standards for timber buildings

Principles included in this strategy
  • Accounting for Whole Life Cycle
  • Maximising the carbon storage potential of wood
  • Promoting a timber building bioeconomy

Phase 3 Strategy 3.2 Asset Managers

Integrate embodied carbon metrics into ESG reporting and portfolio-level performance indicators

Link funding terms directly to carbon and biodiversity metrics. Use third-party LCA and ESG data to verify performance and align returns with sustainability goals.

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 3 Strategy 3.2 Insurers

Develop risk models that recognise resilience benefits from prefabricated and responsibly sourced timber

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 3 Strategy 3.2 Developers

Disclose embodied carbon results and demonstrate compliance with whole-life performance benchmarks to secure lower financing costs

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 3 Strategy 3.2 Developers

Include ESG-linked loan or bond covenants tied to Whole Life Cyclearbon performance

Disclose embodied carbon results and demonstrate compliance with whole-life performance benchmarks to secure lower financing costs.

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 3 Strategy 3.2 Insurers

Informing the future. Monitor timber safety, durability performance, on-site practices and material handling to improve future risk modelling for timber projects

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 3 Strategy 3.2 Investors & Asset Owners

Link funding terms directly to carbon and biodiversity metrics. Use third-party LCA and ESG data to verify performance and align returns with sustainability goals

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 4 Strategy 4.2 Developers Contractors Designers

Use prefabrication and other deisgn methods for structural timber components to reduce waste and improve quality control

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 4 Strategy 4.2 Insurers

Adjust premiums based on carbon reduction, durability, and safety performance of timber systems to reflect actual risk

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 4 Strategy 4.2 Cities & Policymakers

Commission third-party sourcing audits during construction. Require documentation of certified timber deliveries and share data through open databases

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 4 Strategy 4.2 Contractors

Implement just-in-time logistics, digital QA systems, and moisture control protocols to avoid losses and material degradation

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 4 Strategy 4.2 Designers

Ensure all design tolerances and detailing protect timber from moisture and damage during assembly

Principles included in this strategy
  • Accounting for Whole Life Cycle

Phase 5 Strategy 5.1 Asset Managers

Implement regular moisture checks and surface treatments for exposed timber

Principles included in this strategy
  • Accounting for Whole Life Cycle