Showing results 1 - 27 of 27
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A simple vented attic with good air-sealing of the drywall ceiling air barrier, air flow from soffit vents to ridge vents protected by ventilation baffles, and lots of insulation covering the attic floor is unlikely to encourage ice dams.
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An IR camera image shows gaps around HVAC flue pipes allow conditioned air to leak through blown fiberglass into the attic
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Batt insulation is installed in two layers in perpendicular directions against the baffle to full required insulation height
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Batt insulation is installed in two layers with offset seams against the baffle to full code-required insulation height
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Clean the attic floor of debris prior to installing new attic insulation. Use baffles to provide a path for ventilation air entering the attic from the soffit vents
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Closed-cell spray foam insulation covers the attic floor to provide a continuous air control layer.
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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.
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Limited attic access can make inspections for missing air barriers and insulation challenging
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Right - Baffles are installed in attic to keep blown insulation from blocking soffit vents and ventilation path
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Right - Blown insulation in existing attic provides even coverage completely filling the attic space to a depth that covers the ceiling joists.
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Right - Closed-cell spray foam covers the ceiling and joists to insulate and air-seal the ceiling deck.
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Right - Spray foam insulation air-seals the ceiling-to-drywall seams at the wall top plate.
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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 - The wall top plates are sealed with foam before installing insulation on the ceiling deck.
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Right – Spray foam insulation is sprayed on the underside of the roof deck to provide a conditioned space in this low attic for the HVAC ducts.
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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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Seal the drywall to top-plate seams and the lower edge of baffles to the top plate to prevent the air coming from soffit vents from flowing under baffles into insulation.
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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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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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Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition
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Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition
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Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge
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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.