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Spray foam insulation air seals the underside of the flooring of a home built on piers.

Spray foam insulation air seals the underside of the flooring of a home built on piers.

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Plumbing penetrations through the below slab insulation are sealed with tape and spray foam.

Plumbing penetrations through the below slab insulation are sealed with tape and spray foam.

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The rough opening around this window is air sealed and insulated with nonexpanding spray foam.

The rough opening around this window is air sealed and insulated with nonexpanding spray foam.

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This IR camera image shows a recessed can light that is well sealed and insulated.

This IR camera image shows a recessed can light that is well sealed and insulated.

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Wrong - Duct insulation and vapor barrier do not cover all of the flex duct.

Wrong - Duct insulation and vapor barrier do not cover all of the flex duct.

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New Code Options for Insulating, Sealing, and Controlling Moisture in Unvented Attics in Residential Buildings

New Code Options for Insulating, Sealing, and Controlling Moisture in Unvented Attics in Residential Buildings

Presentation

Webinar explaining new code options for insulating, sealing, and controlling moisture in unvented attics in residential buildings.

Spray foam insulates and air-seals the ceiling deck and top plates of this vented attic.

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The baffle is air sealed in place with spray foam before installing fiberglass or cellulose insulation

The baffle is air sealed in place with spray foam before installing fiberglass or cellulose insulation

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Wrong - Flex duct insulation is overly compressed in 3 ways; Zip-tie fastener is over the insualtion not under the insulation at the duct boot collar, duct turning radius is too tight, and support strap is too tight.

Wrong - Flex duct insulation is overly compressed in 3 ways; Zip-tie fastener is over the insualtion not under the insulation at the duct boot collar, duct turning radius is too tight, and support strap is too tight.

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Wrong – Fibrous insulation is not an air barrier and cannot be used to air-seal openings.

Wrong – Fibrous insulation is not an air barrier and cannot be used to air-seal openings.

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Measure Guideline: Wall Air Sealing and Insulation Methods in Existing Homes - An Overview of Opportunity and Process

Reference

Document providing renovators and retrofit contractors an overview of considerations when including wall air sealing and insulation in an energy retrofit project.

Wrong- A tie strap should not be used over the duct outer liner because it can compress the insulation. Tuck in the fibrous insulation and seal the outer liner to the connecting duct with mastic or foil tape (Steven Winter Associates 2013).

Wrong- A tie strap should not be used over the duct outer liner because it can compress the insulation. Tuck in the fibrous insulation and seal the outer liner to the connecting duct with mastic or foil tape (Steven Winter Associates 2013).

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Air barrier at garage band joist - 1 inch rigid insulation with 1x3 wood furring

CAD File

Air barrier at garage band joist - 1 inch rigid insulation with 2x2 wood furring

CAD File

Air barrier at garage band joist - 1 1/2 inch rigid insulation with 2x4 sleepers

CAD File

Right – A layer of sealant covers the wood-to-foam layer seams in the insulated header.

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Right – The top of the enclosure over this recessed can light remains clear of attic insulation

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Wrong - Rigid insulation blocking is installed but not air-sealed with spray foam around edges.

Wrong - Rigid insulation blocking is installed but not air-sealed with spray foam around edges.

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Right - Walls and ceilings shared by the garage and living space must be air sealed and insulated.

Right - Walls and ceilings shared by the garage and living space must be air sealed and insulated.

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2021 IECC Climate Zone 4C: Vented Attic, 2x4 Wall, Interior Insulated Basement

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2021 IECC Climate Zone 6B: Vented Attic, Strapped 2x6, Interior Insulated Basement

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2021 IECC Climate Zones 7 and 8: Vented Attic, Strapped 2x6, Interior Insulated Basement

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2021 IECC Climate Zone 5C: Vented Attic, Strapped 2x6, Interior Insulated Basement

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2021 IECC Climate Zone 6A: Vented Attic, 2x4 Wall, Interior Insulated Basement

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2021 IECC Climate Zone 6A: Vented Attic, Strapped 2x6, Interior Insulated Basement

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2021 IECC Climate Zone 6B: Vented Attic, 2x4 Wall, Interior Insulated Basement

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2021 IECC Climate Zone 4C: Vented Attic, Strapped 2x6, Interior Insulated Basement

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2021 IECC Climate Zone 5A: Vented Attic, 2x4 Wall, Interior Insulated Basement

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2021 IECC Climate Zone 5B: Vented Attic, Strapped 2x6, Interior Insulated Basement

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2021 IECC Climate Zone 5C: Vented Attic, 2x4 Wall, Interior Insulated Basement

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