actionthatstopdraft

actionthatstopdraft is a term used to describe interventions intended to prevent air movement through gaps and openings in a building envelope, thereby reducing heat loss, cold drafts, and energy use. It encompasses practices commonly known as draft-proofing or weatherization.

Typical actions include sealing gaps with caulk or foam, applying weatherstripping to doors and windows, installing door sweeps, upgrading attic and wall insulation, and, where appropriate, adding storm windows or doors. Some actions are passive, such as sealing and insulation; others are active, such as adjustable dampers or controlled ventilation systems that balance energy savings with indoor air quality.

Effectiveness is commonly assessed through air leakage tests like blower-door tests and ACH50 measurements, with energy savings varying by climate, building type, and occupancy. The approach often combines multiple actions to address different leakage paths, including joints, penetrations, and surface areas with insufficient insulation.

Limitations include the potential for reduced ventilation and moisture problems if sealing is overdone, as well as upfront costs and potential impacts on indoor air quality. Proper design and periodic review are important to maintain a healthy balance between energy efficiency and ventilation needs.

The term actionthatstopdraft is a descriptive label rather than a formal technical standard, and it is primarily used to discuss a family of interventions aimed at reducing unwanted air leakage. See also weatherization, air sealing, draft stopping, and energy efficiency.