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Wind uplift pressure diagram of forces on continuous load path key links.

Wind uplift pressure diagram of forces on continuous load path key links.
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Wind-Damage Reduction as a Function of Retrofit Level

Wind-Damage Reduction as a Function of Retrofit Level
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With exhaust-only ventilation, the building is under negative pressure

With exhaust-only ventilation, the building is under negative pressure
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With supply-only ventilation, the building is under positive pressure

With supply-only ventilation, the building is under positive pressure
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Wrap the air-sealed chimney with mineral wool insulation to prevent contact with the warm brick when attic insulation is re-installed around the chimney

Wrap the air-sealed chimney with mineral wool insulation to prevent contact with the warm brick when attic insulation is re-installed around the chimney
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Wrong - Attic kneewall missing air barrier

Wrong - Attic kneewall missing air barrier
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Wrong - Batt insulation does not provide complete coverage across the attic floor so ceiling joists are exposed resulting in thermal bridging.

Wrong - Batt insulation does not provide complete coverage across the attic floor so ceiling joists are exposed resulting in thermal bridging.
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Wrong - Ceiling air barrier not properly installed

Wrong - Ceiling air barrier not properly installed
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Wrong - Exhaust fans should not have tight bends in duct work, especially right next to the fan as this can block airflow

Wrong - Exhaust fans should not have tight bends in duct work, especially right next to the fan as this can block airflow
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Wrong - IR image is showing that attic access is missing weather stripping.

Wrong - IR image is showing that attic access is missing weather stripping.
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Wrong - No air barrier is present between the dropped ceiling/soffit and the attic.

Wrong - No air barrier is present between the dropped ceiling/soffit and the attic.
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Wrong - No air barrier is present between the dropped ceiling/soffit and the attic.

Wrong - No air barrier is present between the dropped ceiling/soffit and the attic.
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Wrong - Not enough straps were used to hang this flex duct so it is sagging, restricting air flow

Wrong - Not enough straps were used to hang this flex duct so it is sagging, restricting air flow
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Wrong - This attic access hatch cover is not insulated

Wrong - This attic access hatch cover is not insulated
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Wrong - This IR image of a second-floor landing shows that attic air is flowing far into the interstitial floor cavity of the second-floor landing

Wrong - This IR image of a second-floor landing shows that attic air is flowing far into the interstitial floor cavity of the second-floor landing
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Wrong - This IR image shows where hot attic air has penetrated into the floor cavity that lies behind the stairwell wall

Wrong - This IR image shows where hot attic air has penetrated into the floor cavity that lies behind the stairwell wall
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Wrong - Wind baffle installation will not allow insulation over the top plate.

Wrong - Wind baffle installation will not allow insulation over the top plate.
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Wrong – Attic access panel does not have an insulation cover installed

Wrong – Attic access panel does not have an insulation cover installed
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Wrong – Drop down stairs do not have insulation cover installed

Wrong – Drop down stairs do not have insulation cover installed
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Wrong – Gable end vents can circumvent soffit-to-ridge airflow and allow in wind-driven rain and wildfire embers

Wrong – Gable end vents can circumvent soffit-to-ridge airflow and allow in wind-driven rain and wildfire embers
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Wrong – Insulation will not be aligned with air barrier

Wrong – Insulation will not be aligned with air barrier
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Wrong – No blocking installed to prevent attic insulation from falling into stairs and opening

Wrong – No blocking installed to prevent attic insulation from falling into stairs and opening
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Wrong – No rigid backing was installed on the attic knee wall.

Wrong – No rigid backing was installed on the attic knee wall.
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Wrong – No top plate was installed.

Wrong – No top plate was installed.