BASC Search | Building America Solution Center

Cover the roll of fiberglass batt with spray foam to air seal it in place

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Wrong – Seams in the furnace-to-AC connection at the air handler are not sealed.

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Spray foam insulates and air seals the underside of the attic roof and walls.

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Spray foam insulates and air seals the exterior wall behind the fireplace.

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Right: The bottom of the air handler cabinet is well sealed to the return platform

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Right – Blocking installed and air sealed instead of continuous top plate

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Wrong – Fibrous insulation is not an air barrier and cannot be used for sealing holes.

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Wrong – Fibrous insulation is not an air barrier and cannot be used for sealing holes.

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Air seal around kitchen and bathroom exhaust fans to keep conditioned air from leaking into unconditioned space.

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Extra-wide air sealing tape seals seam where the structural insulated panels (SIPs) that form the roof and walls meet.

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Building America Energy Performance Brief: Insulating and Air Sealing Cantilevered Floors

Case Study

Case study describing the proper techniques and steps in insulating and air sealing a cantilevered floor, as well as the consequences for failing to do so properly.

Measure Guideline: Air Sealing Mechanical Closets in Slab-on-Grade Homes

Reference

Document covering two fundamental retrofit strategies for air sealing around air handling systems that are located within the living space in an enclosed closet.

Validation Study of Experimental Insulating and Air-Sealing Technology for Enclosed Roof Cavities

Reference

Research report that validates Pinhole Insulation®, offering a cost-effective, minimally invasive solution for enhancing insulation and air sealing in enclosed roof cavities, improving R-value by 60% compared to traditional methods.

Wrong - This IR image shows a lack of air-sealing around the door, window, and light switch that is allowing in cold air.

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Air Sealing Best Practices and Code Compliance for Multifamily Area Separation Walls

Presentation

Webinar describing the best practices for air sealing multifamily separation walls.

Air sealing wall between a porch roof and attic with 1 inch of rigid insulation

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Building America Energy Performance Brief: Air Sealing and Insulating Fireplace Enclosures

Case Study

Case study describing how to air seal and insulate fireplace enclosures in order to limit the large amount of air leakage that their presence can bring and obscure from view.