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Image:

Wrong – A clothes dryer that vents to the crawlspace can contribute moisture to the crawlspace; this can result in damp, molding, and rotting insulation

Wrong – A clothes dryer that vents to the crawlspace can contribute moisture to the crawlspace; this can result in damp, molding, and rotting insulation
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Wrong – Don’t use nails to fasten poly vapor barrier around flex ducts; it will allow moist air to reach the ducts where it could condense and ruin the insulation.

Wrong – Don’t use nails to fasten poly vapor barrier around flex ducts; it will allow moist air to reach the ducts where it could condense and ruin the insulation.
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Wrong – Insulation is in direct contact with this non-insulation contact (IC)-rated recessed light fixture

Wrong – Insulation is in direct contact with this non-insulation contact (IC)-rated recessed light fixture
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Wrong – Seams of air barrier not sealed

Wrong – Seams of air barrier not sealed
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Wrong – Seams of air barrier not sealed

Wrong – Seams of air barrier not sealed
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Wrong – The gable end wall failed because the rigid foam sheathing was not backed up by plywood or OSB.

Wrong – The gable end wall failed because the rigid foam sheathing was not backed up by plywood or OSB.
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Wrong: Closed-cell spray foam roof insulation was not thick enough to meet IRC levels so the foam surface is colder than the dew point of the interior air and condensation formed on surface of the foam

Wrong: Closed-cell spray foam roof insulation was not thick enough to meet IRC levels so the foam surface is colder than the dew point of the interior air and condensation formed on surface of the foam
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Wrong: Drywall does not extend beyond chase wall framing and is unsealed in a hallway dropped ceiling chase

Wrong: Drywall does not extend beyond chase wall framing and is unsealed in a hallway dropped ceiling chase
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Wrong: Ducts are held above the ceiling plane with strapping to provide a good angle into top-entry boots. Once the ceiling insulation is added, this duct will protrude from the ceiling insulation and will not be buried

Wrong: Ducts are held above the ceiling plane with strapping to provide a good angle into top-entry boots. Once the ceiling insulation is added, this duct will protrude from the ceiling insulation and will not be buried
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Wrong: The fiber-cement siding has cracked due to over-driven nails located too close to the edge of the board; these cracks provide a pathway for bulk water entry and offer little resistance to high winds.

Wrong: The fiber-cement siding has cracked due to over-driven nails located too close to the edge of the board; these cracks provide a pathway for bulk water entry and offer little resistance to high winds.
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Wrong: The waterproofing around this hose bib was haphazardly detailed allowing water a pathway to wick behind the siding.

Wrong: The waterproofing around this hose bib was haphazardly detailed allowing water a pathway to wick behind the siding.
Video:

Your Northern Home: Attics/Air leakage/Stack effect

Video:

Your Northern Home: Crawl Spaces in Southeast Alaska