In homes built on slopes with complex geometry including unconditioned stairwells that extend through the attic, electrical penetrations in the ceiling above unconditioned spaces become critical air leakage points that are easy to miss, whereas similar penetrations in normal ceiling cavities are less consequential.
causalpending
Speaker
Unidentified Speaker — Dryer Won't Dry Clothes- Broken Dryer, or Airtight Home? (f… [2iPly4z1Xoo]Evidence Quote
“there's a portion in the Attic where um all of the air sealing on on the ceiling of the house doesn't matter that much because my main air barrier is at the roof um but in this one particular spot it does matter because that portion of the ceiling right below it is that stairwell”
Created: 8/13/2026, 7:44:04 AM
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