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Unvented Attic Insulation

Guide describing methods for insulating an unvented attic along the roof line.

Unvented Insulated Sloped Roofs

Guide describing construction of sloped roofs that are unvented and are insulated above the roof deck.

Below Deck Spray Foam Insulation for Existing Roofs

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

2x4 Raised Truss - Insulation Below Roof Deck CAD

DWG

PDF

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.

2x10 Rafter - Insulation Above Roof Deck and In Rafter Cavity CAD

DWG

PDF

2x10 Rafter - Insulation Below Roof Deck In Rafter Cavity CAD

DWG

PDF

2x12 Rafter - Insulation Above Roof Deck and In Rafter Cavity CAD

DWG

PDF

2x12 Rafter - Insulation Below Roof Deck In Rafter Cavity CAD

DWG

PDF

Water Managed Roof – Re-roofing and Adding Insulation Over a Sloped Roof

Guide describing how to re-roof an existing home with a sloped and add insulation above the roof deck.

Technology Solutions Case Study: Field Testing an Unvented Roof with Fibrous Insulation and Tiles

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

February, 2016

Case study describing field testing of an unvented roof with fibrous insulation and tiles.

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.

Publication Date

Tue, 02/16/2010 - 12:00

Unvented roof assembly at rake retrofitted with spray foam installed along the underside of the roof deck and extended to the rake edge to insulate and air seal the attic

Publication Date

Mon, 07/01/2013 - 12:00

Roof/Attic to Exterior Wall Air Control Upgrade

Guide outlining how to retrofit an exterior wall and/or attic to provide continuous air sealing.

Vented versus Unvented Attic

Guide describing options for designing and locating the thermal boundary at either the attic floor or along the roof line in new and existing homes.

Technology Solutions Case Study: Field Testing an Unvented Roof with Asphalt Shingles in a Cold Climate

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

September, 2015

Case study describing an experiment to build and instrument unvented test roofs using air-permeable insulation in a cold climate and to analyze the moisture effects over time.

Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and taped top edge of existing house wrap or building paper

Publication Date

Mon, 07/01/2013 - 12:00

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

Publication Date

Mon, 07/01/2013 - 12:00

Disaster-Resistant Roof Venting

Guide describing the installation of roof vents that are resistant to damage from high winds and entry of wind-borne rain, wildfire embers, or pests.

Attic Ventilation Fans

Guide describing the use of attic ventilation fans to mechanically pull outside air through the attic in an attempt to cool the attic, control moisture, and prevent ice dams.