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Mold on the sheathing in this attic occurred after attic ventilation was increased

Publication Date

Sun, 01/01/2012 - 12:00

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

Reference

Measure Guideline: Selecting Ventilation Systems for Existing Homes

Author(s)

Aldrich Robb

Organization(s)

Consortium for Advanced Residential Buildings,

CARB,

Steven Winter Associates,

SWA,

U.S. Department of Energy,

DOE

This document addresses adding—or improving—mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes either directly or by dilution. This report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards.

Publication Date

Sat, 02/01/2014 - 12:00

Reexamining Roof Ventilation

Author(s)

Woods Tony

Organization(s)

Home Energy,

National Association for State Community Services Programs,

NASCSP

Publication Date

November, 2000

Article describing moisture and ice dam issues in attics and how to air seal the attic floor.

Attic Venting, Attic Moisture, and Ice Dams

Author(s)

Canada Mortgage and Housing Corporation

Organization(s)

CMHC,

Government of Canada

Publication Date

August, 1999

Article by the Canadian Government on attic ventilation and considerations for moisture and ice dams.

Managing Indoor Humidity and Ventilation in Cold Weather

Guide describing steps to take to minimize indoor humidity in preparation for cold winter weather.

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.

Whole-House Ventilation Strategies for New Homes

This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.

Building Science Insights: To Vent or Not to Vent

Publication Date

February, 2014

Author(s)

Lstiburek

Organization(s)

Owens Corning

Video presentation describing proper attic venting design for energy efficiency and weather resistance.

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.

Attach a strong permanent cover to gable end vents before a severe storm strikes to prevent moisture intrusion.

Publication Date

Wed, 01/01/2020 - 12:00

Bathroom Exhaust Fans

Guide describing how to install a bathroom exhaust fan to remove excess moisture.

Home Performance Assessment

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

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.

Air Sealing Bathroom and Kitchen Exhaust Fans

Guide describing how to air-seal bathroom and kitchen exhaust fans.

Aerosol Sealing Building Enclosures, Single and Multifamily Dwellings - Code Compliance Brief

Publication Date

January, 2020

The intent of this brief is to provide code-related information for aerosol sealing building enclosures to achieve durable air tightness levels that will be accepted as being in compliance with the code.