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Deep Energy Retrofits Building Enclosures—Part 1 Whole House; (Above Grade)

Deep Energy Retrofits Building Enclosures—Part 1 Whole House; (Above Grade). Rob Dumont robdumont@hotmail.com. Case Study Deep Energy Retrofit Double-Wall Double Roof Retrofit. Location: Saskatoon, Canada Latitude 52 N Annual Heating Degree Days: 10950 Fahrenheit 1968 Bungalow .

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Deep Energy Retrofits Building Enclosures—Part 1 Whole House; (Above Grade)

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  1. Deep Energy RetrofitsBuilding Enclosures—Part 1Whole House; (Above Grade) Rob Dumont robdumont@hotmail.com

  2. Case StudyDeep Energy RetrofitDouble-Wall Double Roof Retrofit • Location: Saskatoon, Canada • Latitude 52 N • Annual Heating Degree Days: 10950 Fahrenheit • 1968 Bungalow

  3. Pre-Retrofit

  4. Post Retrofit

  5. Pre-Retrofit

  6. Energy Results • Peak Heat Loss reduced from 13.1 kW to 5.5 kW

  7. Step 1. Cut off eaves and wrap roof and walls with poly

  8. Step 2. Add second roof

  9. Step 3. Add exterior wall system

  10. Step 4. Finish details around windows & doors

  11. Insulation of walls & bsmt walls

  12. R40 on Roof ; R40 on Walls; R40 in Bsmt Walls

  13. Post Retrofit—Asphalt Shingles, Stucco Walls

  14. Comparison of Pre and Post

  15. Advantages of Deep Exterior Envelope Retrofits 1. Conduction losses greatly reduced 2. Air leakage great reduced 3. Heating system can be greatly simplified. 4. Works best when simultaneous need for upgraded siding and roofingn 5. No interior space loss 6. House can be occupied during work.

  16. Disadvantage Attic upgrades are usually much less expensive than a double roof retrofit, but in some cases the attic is non-existent or inaccessible.

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