Showing results 1 - 22 of 22
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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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A typical Las Vegas hot-dry climate home made of wood frame construction and insulated with R-25 expanded polystyrene externally over a drainage plane, with an unvented wood frame insulated attic and roof assembly.
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Air-Impermeable Insulation for Condensation Control in Unvented Attics, per IRC Table 806.5.
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Detail of an unvented cathedralized attic showing air-impermeable spray foam insulation plus batt insulation installed on the underside of the roof deck.
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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.
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Right - Continuous wall sheathing and blocking has been installed to brace the raised heel trusses.
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Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.
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Right - Spray foam insulation has been sprayed onto the underside of the sloped roof and the gable end wall to provide a sealed, insulated attic for housing the HVAC ducts
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Right - These raised heel roof trusses provide 16 inches of space over the outer walls for full insulation coverage at the attic perimeter.
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Right - This new sealed attic has 5.5 inches (R-20) of spray foam insulation along the underside of the roof deck providing a conditioned attic space for the heating and cooling ducts.
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Right – Closed-cell polyurethane foam is sprayed on the underside of the roof deck to provide structural connections and seal seams in the sheathing to increase wind resistance
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Right – Roof underlayment is fully adhered and roof deck seams are sealed so roof is resistant to high-wind events
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Right – Roof underlayment is fully adhered and roof deck seams are sealed so roof is resistant to high-wind events
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Sloped roof with cavity spray foam insulation sprayed on underside of roof deck and covered with sprayed-on thermal or ignition barrier coating.
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Sloped roof with cavity spray foam insulation, strapping, and gypsum board thermal barrier
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Spray foam insulation was installed on the underside of the roof deck and on gable end attic walls to create an unvented attic
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The soffit dam and baffle allow air to flow through the vents without disturbing the insulation covering the top plates
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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 – Roof underlayment is not fully adhered and roof deck seams are not sealed so roof is susceptible to high-wind events
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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