Publications and Reports | CMHC

Energy Efficiency Building Envelope Retrofits
Exterior Retrofits for 1960s and 1970s Two-Storey Houses
10% or 25% Space Heating Energy Savings
67785

This fact sheet describes the starting point (what you have now), air-sealing and insulation options to achieve the targeted energy savings, technical considerations to keep in mind in the planning of the retrofit project, and general precautions.