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Right - Spray foam insulates the attic eave between the attic floor and the SIP roof panel.

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The missing top plate in a kneewall was covered with lumber and rigid foam insulation and then sealed with spray foam

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Building America Top Innovations 2014: Cost-Optimized Attic Insulation Solution for Factory-Built Homes

Case Study

Case study describing a DOE Building America 2014 Top Innovation about the development and testing of a new attic insulation method for dense packing the shallow attic space in manufactured homes with blown fiberglass insulation based on research conducted by the Levy Partnership.

Install a continuous air barrier below or above ceiling insulation and install wind baffles.

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Right - Wind baffle installation will allow proper insulation depth over the top plate.

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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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Application of Spray Foam Insulation Under Plywood and Oriented Strand Board Roof Sheathing, BA-1312

Reference

Report covering moisture and leakage issues associated with spray foam insulation application to the underside of roof sheathing.

Closed-cell spray foam insulation covers the attic floor to provide a continuous air control layer.

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Wrong: Ductwork is not fully encapsulated with ccSPF insulation. The duct jacket is still fully visible at sections of the duct

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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 - Closed-cell spray foam covers the ceiling and joists to insulate and air-seal the ceiling deck.

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Buried ducts are laid on the floor of a vented attic then covered with spray foam and blown attic floor insulation

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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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Right – Blocking has been installed around the perimeter of this attic access to prevent insulation falling into the house

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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.

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Cost Analysis of Roof-Only Air Sealing and Insulation Strategies on 1 1/2-Story Homes in Cold Climates

Reference

Report exploring alternative methods to find long-term solutions to energy loss in 1 ½-story homes to save energy, improve comfort, prevent frost buildup on the underside of the roof deck, and reduce the risk of ice dam formation/reformation.

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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These baffles have a wind dam at the back which drops down into the rafter bay to serve as a backstop for insulation

Standard roof trusses are narrow at the eaves, preventing full insulation coverage over the top plate of the exterior walls

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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 – 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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This attic access hatch is in the master bedroom closet ceiling - be prepared for falling insulation when you lift the hatch

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After all holes through the ceiling are air-sealed and the baffles have been installed, then the insulation can be installed.

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Right – Attic access hatch has been properly insulated by attaching a fiberglass batt, gasketed, and opening has blocking

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Wrong – The batt insulation on this knee wall is not properly supported and there is no air sealed rigid backing to provide a solid air barrier.

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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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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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The builders sprayed the underside of the roof assembly with 6 inches of open-cell spray foam to create an unvented, R-48 insulated attic.

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Right - Spray foam insulates the attic eave between the attic floor and the SIP roof panel.

The missing top plate in a kneewall was covered with lumber and rigid foam insulation and then sealed with spray foam

Building America Top Innovations 2014: Cost-Optimized Attic Insulation Solution for Factory-Built Homes

Install a continuous air barrier below or above ceiling insulation and install wind baffles.

Right - Wind baffle installation will allow proper insulation depth over the top plate.

Right - Baffles are installed in attic to keep blown insulation from blocking soffit vents and ventilation path

Application of Spray Foam Insulation Under Plywood and Oriented Strand Board Roof Sheathing, BA-1312

Closed-cell spray foam insulation covers the attic floor to provide a continuous air control layer.

Wrong: Ductwork is not fully encapsulated with ccSPF insulation. The duct jacket is still fully visible at sections of the duct

Right - Spray foam insulation air-seals the ceiling-to-drywall seams at the wall top plate.

Right - Closed-cell spray foam covers the ceiling and joists to insulate and air-seal the ceiling deck.

Buried ducts are laid on the floor of a vented attic then covered with spray foam and blown attic floor insulation

Design the roof with raised heel trusses to allow full insulation over the top plates of the exterior walls.

Right – Blocking has been installed around the perimeter of this attic access to prevent insulation falling into the house

Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.

Cost Analysis of Roof-Only Air Sealing and Insulation Strategies on 1 1/2-Story Homes in Cold Climates

Spray foam insulation was installed on the underside of the roof deck and on gable end attic walls to create an unvented attic

These baffles have a wind dam at the back which drops down into the rafter bay to serve as a backstop for insulation

In cathedral ceilings, parallel chord trusses allow thicker insulation levels over the exterior wall top plates.

The soffit dam and baffle allow air to flow through the vents without disturbing the insulation covering the top plates

Standard roof trusses are narrow at the eaves, preventing full insulation coverage over the top plate of the exterior walls

Right – This attic knee wall and the floor joist cavity openings beneath it are being sealed and insulated with spray foam.

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.

This attic access hatch is in the master bedroom closet ceiling - be prepared for falling insulation when you lift the hatch

After all holes through the ceiling are air-sealed and the baffles have been installed, then the insulation can be installed.

Right – Attic access hatch has been properly insulated by attaching a fiberglass batt, gasketed, and opening has blocking

Wrong – The batt insulation on this knee wall is not properly supported and there is no air sealed rigid backing to provide a solid air barrier.

Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge

Right - Blown insulation in existing attic provides even coverage completely filling the attic space to a depth that covers the ceiling joists.

The builders sprayed the underside of the roof assembly with 6 inches of open-cell spray foam to create an unvented, R-48 insulated attic.