Showing results 1 - 28 of 28
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A 1- and ½-story home with a room located in the attic and the thermal boundary located at either a) the walls and ceiling of the attic room with small vented attic spaces or b) the roof line for an unvented attic
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A low-sloped shed roof with the thermal boundary located at either a) the flat ceiling with a vented attic or b) the roof line for an unvented attic
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Design the roof with raised heel trusses to allow full insulation over the top plates of the exterior walls.
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Floor cavity pressure is measured by inserting a tube into the floor cavity using an extension pole
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In cathedral ceilings, parallel chord trusses allow thicker insulation levels over the exterior wall top plates.
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Infrared imaging shows cold conditioned air pouring out of the open floor cavities under this attic kneewall into the hot unconditioned attic
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Install insulation under platforms constructed in the attic for storage or equipment.
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Limited attic access can make inspections for missing air barriers and insulation challenging
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Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.
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Right - Continuous wall sheathing and blocking has been installed to brace the raised heel trusses.
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Right – Insulation installed to correct depth and will be aligned with air barrier
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Right – This attic knee wall and the floor joist cavity openings beneath it are being sealed and insulated with spray foam.
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Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall
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Standard roof trusses are narrow at the eaves, preventing full insulation coverage over the top plate of the exterior walls
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The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation
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The floor cavities under this attic kneewall are completely open to the unconditioned attic space and a prime target for wind washing
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The thermal boundary for a gable roof can be located at either a) the flat ceiling with a vented attic or b) the roof line for an unvented attic
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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.
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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
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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
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Wrong – The framing and wind baffle installation will not allow for required insulation depth.
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Wrong – This second-story floor plan has red lines that indicate openings from the attic into the interstitial floor space