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Understanding Attic Ventilation, BSD-102

Reference

BSD-102 report providing guidance about whether to construct a vented or unvented attic based on hygro-thermal zone.

This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home

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Unvented Attic Insulation

Guide

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

Blown Insulation for Existing Vented Attic

Guide

Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.

Batt Insulation for Existing Vented Attics

Guide

Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.

Attic Radiant Barriers

Guide

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

Attic Eave Minimum Insulation

Guide

Guide providing guidance on insulating attic eaves in new and existing single-family homes and multifamily buildings.

Spray Foam Insulation Applied to Existing Attic Floor

Guide

Guide describing how to apply spray foam insulation to the floor of the attic in existing homes.

Air Sealing and Insulating Ceilings in Vented Attics

Guide

Guide describing how to air-seal and insulate a ceiling where the insulation is installed on top of the ceiling (on the attic floor) in a vented attic.

Air seal the attic access panel with weatherstripping.

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Pre-Retrofit Assessment of Attics, Ceilings, and Roofs

Information Guide

Information guide describing things to consider in the attic, ceiling, or roof before attempting retrofits of items including HVAC, wiring, or structural systems.

Air seal and insulate drawer and closet boxes in attic kneewalls

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Air seal the attic access pull-down stairs opening with weatherstripping.

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Air Sealing Attic Access Panels/Doors/Stairs

Guide

Guide describing how to air-seal attic access panels, doors, and stairs to provide a continuous air barrier at the ceiling.

Baffles provide an air space over the insulation to guide ventilation air from the soffit vents up along the underside of the roof deck

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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.

Technology Solutions Case Study: Complete and Fully Aligned Air Barrier

Case Study

Case study describing the elimination of excessive humidity in the attic of a multi-floor, single-family home that was causing condensation and water damage along the roof and eaves.

Home Performance Assessment

Information Guide

Information guide describing how to apply a whole-house approach to home improvement with energy efficiency upgrades, improved indoor air quality, and increased comfort.