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Above Deck Rigid Foam Insulation for Existing Roofs

Guide describing the installation of insulating sheathing above the roof deck on existing homes. This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic.
Guide

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

Author(s)
Ojczyk Cindy
Organization(s)
University of Minnesota,
U.S. Department of Energy,
DOE,
NothernSTAR
Publication Date
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.
Reference
Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.

Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.

Publication Date
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Skylight Shaft Walls

Guide describing insulation techniques for skylight shaft walls.
Guide

Walls Adjoining Porch Roof

This guide describes how to install a rigid air barrier to separate the porch attic from the conditioned space.
Guide

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.
Guide

Controlling Moisture in Unvented Attics - Code Compliance Brief

Publication Date
The intent of this brief is to provide code-related information about controlling moisture in unvented attics by installing a vapor diffusion port/vent that would convey water vapor from an unvented attic to the outside when air-permeable insulation materials are installed and can be verified as being in compliance with the related codes and standards for residential construction. Providing consistent information to document compliance with codes and standards to all relevant parties responsible for verifying compliance (e.g., code officials, builders, contractors, designers, etc.) is expected to result in increased compliance and more timely, less challenging and more uniform plan review and field inspections.
Code Compliance Brief

Mea Culpa Roofs, BSI-083

Author(s)
Lstiburek Joseph W
Organization(s)
Building Science Corporation,
BSC
Publication Date
Article describing methods for insulating and air sealing vented and unvented roofs in various climates zones.
Reference

Attic Radiant Barriers

Guide describing application of a radiant barrier layer in the attic to block radiant heat transfer between hot surfaces and heat-absorbing surfaces.
Guide

Moisture Control for Residential Buildings

Author(s)
Lstiburek Joseph W
Organization(s)
Building Science Corporation,
BSC,
U.S. Department of Energy,
DOE
Publication Date
Report providing extensive guidance on controlling moisture in building envelopes through proper selection and installation on air, water, thermal, and vapor barriers.
Reference

Roof Deck Sheathing and Sealing for Sloped Roofs

Guide describing requirements for sheathing and sealing the roof decking in accordance with the requirements of the IBHS Fortified Home Program's Hurricane and High Wind Standards, and other roofing considerations to increase the roof's disaster resistance.
Guide