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The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).

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Attic Eave Minimum Insulation

Guide

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

Venting of Attics & Cathedral Ceilings

Reference

Report describing the use of attic ventilation to control moisture in cathedral roofs and avoid the formation of ice dams.

Ventilating Cathedral Ceilings to Prevent Problematic Icings at their Eaves

Reference

Report describing the formation of icicles and ice dams along poorly ventilated roofs and how to mitigate ventilation issues with insulation and vents.

Guidelines for Ventilating Attics and Cathedral Ceilings to Avoid Icings at Their Eaves

Reference

Report describing the use of fresh air ventilation systems to eliminate the formation of icicles and ice dams along the eaves of roofs.

Managing Indoor Humidity and Ventilation in Cold Weather

Guide

Guide describing steps to take to minimize indoor humidity during cold winter weather.