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Air sealing at porch roof at 1/2 inch plywood exterior sheathing

Air sealing at porch roof at 1/2 inch plywood exterior sheathing

CAD File

Building Science for Dry Climates 5 - Building Shell, Air Sealing, & Attics

Presentation

Presentation by Home Performance Contractor Academy giving building science advice for for homes in dry climate zones, specifically building envelope, air sealing, and attics. Part 5 of 7.

Installing European Passive House Windows #005: Interior Air Sealing

Video

Video describing how to air seal the interior of European passive house windows. This video is part of an eight-video series by Hammer & Hand.

Wrong - Holes in rim joist around pipes and wiring are not air-sealed.

Wrong - Holes in rim joist around pipes and wiring are not air-sealed.

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Right - Spray foam fills the walls and rim joists to air seal and insulate while caulk seals the framing joints.

Right - Spray foam fills the walls and rim joists to air seal and insulate while caulk seals the framing joints.

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Sheet metal and mastic provide air sealing around a flue pipe.

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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.

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.

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.

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

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A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts

A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts

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

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

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.

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.

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.

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

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Wrong - Cantilevered floor joist bay cavities are not air sealed with a solid air barrier aligned with the exterior wall.

Wrong - Cantilevered floor joist bay cavities are not air sealed with a solid air barrier aligned with the exterior wall.

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Right - All seams in the HVAC equipment and ductwork are sealed with mastic; because the HVAC equipment is in the garage, it is an air-sealed closet.

Right - All seams in the HVAC equipment and ductwork are sealed with mastic; because the HVAC equipment is in the garage, it is an air-sealed closet.

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Air seal and insulate around the exhaust fan with a rigid foam box

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Window weights can be taken out of cavities to allow for air sealing

Window weights can be taken out of cavities to allow for air sealing

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

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

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Right - The ceiling above the garage is air-sealed and insulated with spray foam.

Right - The ceiling above the garage is air-sealed and insulated with spray foam.

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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.

A premade gasket seals out air leaks around the water line.

A premade gasket seals out air leaks around the water line.

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Wrong – Rigid air barrier not properly sealed around skylight shaft

Wrong – Rigid air barrier not properly sealed around skylight shaft

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Right – Rigid air barrier properly sealed around skylight shaft

Right – Rigid air barrier properly sealed around skylight shaft

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Right – The band joist over this wall was properly insulated and air-sealed.

Right – The band joist over this wall was properly insulated and air-sealed.

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Wrong – The backing on this knee wall was not air sealed prior to adding insulation.

Wrong – The backing on this knee wall was not air sealed prior to adding insulation.

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Wrong – Air barrier not sealed between porch attic and conditioned space

Wrong – Air barrier not sealed between porch attic and conditioned space

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Wrong – Air barrier not sealed between porch attic and conditioned space

Wrong – Air barrier not sealed between porch attic and conditioned space

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