EN   FR
Search
Close this search box.

SUSTAINABLE BUILDINGS

Asset Classes

Focus Area

Energy and Carbon

Topic

Envelope Performance

Question #

E11.2 — Envelope Upgrade

Question

Have major envelope upgrades been completed or initiated in the past ten years?

Applicability

Applicable to all buildings (systems or equipment in the owner or landlord’s control)

Answer

Select applicable:

    • Yes — work is underway or has been completed
    • Yes – we have done an assessment
    • No
    • Not Applicable – new building is already at high-performance

Description

A high-performance building envelope aims to enhance occupant comfort, improve controllability and minimize the transfer of thermal energy between the outdoors and indoors.

Strategies, such as air tightness, shading, triple-paned glazing and increased insulation can be implemented to reduce energy consumption and GHG emissions while improving thermal comfort and reducing the mechanical system Requirements.

Requirements

    1. Identify the major envelope upgrades from the assessment, condition or deep retrofit studies that have been implemented
    2. Document extent of implementation

Also see Other Notes

Documentation

    • Describe measure(s) implemented, the benefit and potential savings impact
    • Evidence of implementation through photos, as-built drawings or other proof

Adapted BB3 Question

Question 01.01.03 – Does the capital plan include measures to ensure continuous improvement of the energy efficiency of the building envelope?

Question 01.05.07 – Are 75% of the building’s exterior windows considered efficient?

Suggested Lead

In-house, with third-party support

References

None

Crosswalk

TBD

Other Notes

High-performance envelope characteristics may include:

    • Exterior shading
    • Automated shading controls
    • Double-paned glazing including high-performance window assembly
    • Double-paned glazing with low-emissivity coating including high-performance window assembly
    • Triple-paned glazing including high-performance window assembly
    • Triple-paned windows with low-emissivity coating including high-performance window assembly
    • Electrochromic glazing
    • Built-in photovoltaics
    • Foundation insulation that is 20% better than current code
    • Roof insulation that is 20% better than current code
    • Wall insulation that is 20% better than current code
    • Natural ventilation when outdoor conditions are favourable

Scoring

Max 3 Points

Verification