BASC Search | Building America Solution Center

Wrong – Penetration hole is larger than duct and not sealed

Wrong – Penetration hole is larger than duct and not sealed

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Continuous Air Barrier in Exterior Walls

Guide

Guide describing how to install continuous air barriers in exterior walls.

Use caulk, foam, or equivalent material to seal gap between common wall

Use caulk, foam, or equivalent material to seal gap between common wall

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Wrong - Tape is not well adhered to house wrap and wiring penetration is not sealed.

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Right – Wiring penetrations have been neatly sealed with foam.

Right – Wiring penetrations have been neatly sealed with foam.

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Wrong – Hole was not neatly cut with a saw, making it difficult to seal.

Wrong – Hole was not neatly cut with a saw, making it difficult to seal.

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Right – Wiring penetrations have been neatly sealed with foam.

Right – Wiring penetrations have been neatly sealed with foam.

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Right – Wiring penetrations have been neatly sealed with foam.

Right – Wiring penetrations have been neatly sealed with foam.

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Right – Kitchen exhaust penetration has been sealed with caulk

Right – Kitchen exhaust penetration has been sealed with caulk

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Wrong – This recessed can light has not been sealed to the drywall.

Wrong – This recessed can light has not been sealed to the drywall.

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Right – The recessed can light penetration is sealed with caulk to the drywall.

Right – The recessed can light penetration is sealed with caulk to the drywall.

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Right – The holes for plumbing are neatly cut and properly sealed with foam.

Right – The holes for plumbing are neatly cut and properly sealed with foam.

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Caulk applied against the backer rod to seal a window rough opening

Caulk applied against the backer rod to seal a window rough opening

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Use caulk, foam or equivalent material to seal gap between partition wall

Use caulk, foam or equivalent material to seal gap between partition wall

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Right – Top plate to drywall connection sealed from attic with foam

Right – Top plate to drywall connection sealed from attic with foam

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Right – Top plate to drywall connection sealed from attic with caulk

Right – Top plate to drywall connection sealed from attic with caulk

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Right – Neatly cut holes have been properly sealed with foam.

Right – Neatly cut holes have been properly sealed with foam.

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Right – Penetrations have been neatly cut and properly sealed with foam

Right – Penetrations have been neatly cut and properly sealed with foam

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Right – This neatly cut hole has been properly sealed with foam.

Right – This neatly cut hole has been properly sealed with foam.

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Right – This hole has been neatly cut and properly sealed with foam.

Right – This hole has been neatly cut and properly sealed with foam.

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Right - Hole drilled to verify sealant is present - Hole will be sealed after verification

Right - Hole drilled to verify sealant is present - Hole will be sealed after verification

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Right – Top plate to drywall connection sealed from attic with foam sealant

Right – Top plate to drywall connection sealed from attic with foam sealant

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Wrong – Roughly cut hole that is larger than the fan, making it difficult to seal

Wrong – Roughly cut hole that is larger than the fan, making it difficult to seal

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Wrong – Roughly cut hole that is larger than the fan, making it difficult to seal

Wrong – Roughly cut hole that is larger than the fan, making it difficult to seal

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Right – These neatly cut holes have been properly sealed with caulk and foam.

Right – These neatly cut holes have been properly sealed with caulk and foam.

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Building Science Introduction - Air Flow

Information Guide

Information guide describing the concept of air flow in residential buildings and its effects on occupants, building durability, and efficiency.

Whole house fans draw cool night-time air in through open windows and expel hot house air into the vented attic

Whole house fans draw cool night-time air in through open windows and expel hot house air into the vented attic

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Your Northern Home: Air Leakage/ Blower Door Test

Video

Video describing a house air leakage test and the most common leakage sources for an Alaskan house.

Wrong - The band joist above this garage-house shared wall is not properly sealed.

Wrong - The band joist above this garage-house shared wall is not properly sealed.

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Wrong – These holes have been cut larger than needed, making them difficult to seal.

Wrong – These holes have been cut larger than needed, making them difficult to seal.

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