After three weeks of focused and challenging thermal boundary remediation the job is completed and the results are excellent.
Most notably the building air leakage rate was reduced by 54%. This brings the air changes per hour down from 2.5 to well below 1 ACHn. The CFM50/shell sqft was reduced by 50%, down to .50 cfm50/ssf. For a thermal boundary remediation project these are great numbers. I say remediation and not renovation because the workscope focuses on particular envelope areas with limited access. When a project is renovation it entails opening of spaces to gain full access, which allows for a more complete install of air/insulation barriers and greater air leakage reduction.
With walls and roof rafters insulated, envelope air sealed and new windows, projected energy savings is over 50%, resulting in conservative $9,000 annual savings and solid ROI.Thank you Smith College for your commitment towards building comfort, energy savings and reduction of green house gases.

Dormer fully insulated/air tight with closed cell foam, fire rated.

Team work! Crew carefully dense packing against old lathe/plaster walls.

 

Rafters dense packed with cellulose. Intricate details around HVAC and wiring.

 

Surprise knee-wall with charred framing. After repairs, fully insulated.