Energy Efficiency Building Envelope Retrofits


Interior Retrofits for 1960s and 1970s Two-Storey Houses – 10% or 25% Space Heating Energy Savings

This fact sheet describes options for adding insulation to, and air sealing, the foundation, walls and attics of typical 1960’s and 70’s two storey houses to achieve space heating energy savings. This fact sheet describes the starting point (what these houses typically have), interior 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 to avoid common pitfalls and unintended consequences of envelope retrofit projects.


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