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Scope 1  ·  2.3.5

Building Envelope

Improving the thermal performance of walls, roofs, windows, and foundations to reduce heating and cooling energy — lowering Scope 1 combustion and Scope 2 electricity demand. Envelope upgrades are most impactful when paired with HVAC electrification and deliver compounding savings across all other building systems.

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Self-Assessment

Select where your organization currently operates and where you want to get to. There is no obligation to reach "Leading Org." — choose the target that is right for your business context and investment capacity.

📍 Current Level
🎯 Target Level
Select your current and target levels above to map your assessment on this initiative.
Fundamental
Market Standard
Above Average
Leading Org.

Technology

  • Fiberglass or mineral wool insulation in wall cavities and attics
  • Standard double-pane windows with low-e coating
  • Air sealing at obvious penetrations (pipes, ducts, windows)

Process

  • ASHRAE Level 1 energy audit to identify obvious envelope deficiencies
  • Blower door tests to quantify air leakage at key facilities
  • Prioritizing upgrades in highest heating/cooling energy intensity buildings

Financing

  • Internal capital for low-cost weatherization (1–3 year payback)
  • IRA Section 179D commercial building deduction (up to $5/sq ft)

Technology

  • Fundamental Technologies +
  • Continuous exterior insulation (rigid foam or mineral wool) on walls and roofs
  • Triple-pane windows with warm-edge spacers in climate-appropriate zones
  • Advanced air barrier systems meeting ASHRAE 90.1 or IECC 2021

Process

  • Integrating envelope scope into all capital projects and major renovations
  • Thermal imaging surveys to find hidden air leakage and insulation gaps
  • Assessing HVAC downsizing opportunities enabled by envelope improvements

Financing

  • Envelope upgrades bundled with HVAC replacements to share project economics
  • PACE financing for deep envelope retrofits on owned properties

Technology

  • Market Standard Technologies +
  • Dynamic glazing (electrochromic windows) for solar heat gain control
  • Vacuum insulated panels (VIPs) or aerogel for space-constrained applications
  • Cool or green roofs reducing urban heat island effect and roof thermal load

Process

  • Whole-building energy modeling (EnergyPlus) before and after envelope retrofit
  • Envelope performance data integrated into digital twin for continuous commissioning
  • LEED v4 or ASHRAE 189.1 envelope compliance on new construction and major renovations

Financing

  • Performance contracting with M&V to fund envelope costs via verified savings
  • Green bond financing for deep retrofits meeting certified green building standards

Technology

  • Above Average Technologies +
  • Passive House or Living Building Challenge envelope with near-zero heating/cooling loads
  • Phase change materials (PCMs) in walls providing thermal mass without added weight
  • Adaptive building skin responding dynamically to weather and grid conditions

Process

  • Net-zero or net-positive energy certification driven primarily by envelope performance
  • Actual vs. modeled energy performance published in sustainability reporting
  • Advocacy for stronger building energy codes through industry and policy engagement

Financing

  • Premium asset valuation from certified high-performance envelope recognized in green appraisal
  • Bundled deep retrofit: envelope + HVAC electrification + renewables as single project

Related Pathways

← All Pathways 1.3.1 HVAC 1.3.2 Smart Building Management