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Unvented Attic Insulation

Guide

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

Unvented Insulated Sloped Roofs

Guide

Guide describing construction of unvented, sloped, insulated roof assemblies in high wind zone areas.

Right – Spray foam insulates the unvented attic.

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Below Deck Spray Foam Insulation for Existing Roofs

Guide

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

CAD File

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

Guide

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

CAD File

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

CAD File

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

CAD File

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

CAD File

Right - This unvented crawlspace is insulated along the walls and between the floor joists with 2-inch foil-faced polyisocyanurate; a termite inspection gap is visible above of the wall insulation and below the band joist.

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Right - Spray foam insulates and air-seals the stone walls of this unvented crawlspace.

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New Code Options for Insulating, Sealing, and Controlling Moisture in Unvented Attics in Residential Buildings

Presentation

Webinar explaining new code options for insulating, sealing, and controlling moisture in unvented attics in residential buildings.

Unvented crawl space with interior insulation - designed for termite resistance in heavily infested areas

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

Case Study

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

Air-Impermeable Insulation for Condensation Control in Unvented Attics, per IRC Table 806.5.

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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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Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas

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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

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Right - This unvented crawlspace is insulated along interior walls with rigid foam and air-sealed by covering the floor with vapor retarder that is sealed to the rigid foam which is taped at the seams.

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Pest proofing of this unvented crawlspace includes a metal termite shield that extends out from the sill plate, metal flashing wrapping the bottom of exterior rigid foam, and a termite inspection gap above interior rigid foam.

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Unvented Attic Insulation

Unvented Insulated Sloped Roofs

Right – Spray foam insulates the unvented attic.

Below Deck Spray Foam Insulation for Existing Roofs

2x4 Raised Truss - Insulation Below Roof Deck CAD

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

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

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

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

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

Right - This unvented crawlspace is insulated along the walls and between the floor joists with 2-inch foil-faced polyisocyanurate; a termite inspection gap is visible above of the wall insulation and below the band joist.

Right - Spray foam insulates and air-seals the stone walls of this unvented crawlspace.

New Code Options for Insulating, Sealing, and Controlling Moisture in Unvented Attics in Residential Buildings

Unvented crawl space with interior insulation - designed for termite resistance in heavily infested areas

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

Air-Impermeable Insulation for Condensation Control in Unvented Attics, per IRC Table 806.5.

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.

Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas

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

Right - This unvented crawlspace is insulated along interior walls with rigid foam and air-sealed by covering the floor with vapor retarder that is sealed to the rigid foam which is taped at the seams.

Vented versus Unvented Attic

Avoiding Wet Roofs - Part I

Avoiding Wet Roofs - Part II

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

Closed Crawlspace - Finished Tour

2021 IECC Climate Zone 1A: Unvented Flat Roof, 2x4 Wall, Monolithic Slab on Grade

DOE ZERH HIA 2013 Case Study: Preferred Builders, Old Greenwich, Connecticut

New Whole-House Solutions Case Study: Imagine Homes: Stillwater Ranch, San Antonio, TX

New Whole-House Solutions Case Study: Insight Homes: Deep Creek, Seaford, Delaware

Pest proofing of this unvented crawlspace includes a metal termite shield that extends out from the sill plate, metal flashing wrapping the bottom of exterior rigid foam, and a termite inspection gap above interior rigid foam.