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A technician assembles the spray sealant injection system to seal HVAC ducts from the inside

A technician assembles the spray sealant injection system to seal HVAC ducts from the inside

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Moisture and Structural Analysis for High Performance Hybrid Wall Assemblies

Reference

Report describing the work conducted for high performance hybrid assemblies.

Block off registers before installing spray sealant in HVAC ducts

Block off registers before installing spray sealant in HVAC ducts

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Connect the plastic application tunnel to the injection equipment

Connect the plastic application tunnel to the injection equipment

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Connect the plastic application tunnel from the injection equipment to the supply plenum.

Connect the plastic application tunnel from the injection equipment to the supply plenum.

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The duct sealing spray injection system application tunnel inflates as the injection system operates

The duct sealing spray injection system application tunnel inflates as the injection system operates

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Manually seal around the supply plenum

Manually seal around the supply plenum

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Manually seal seams in the return plenum

Manually seal seams in the return plenum

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Manually seal around the return plenum

Manually seal around the return plenum

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Manually seal around ceiling registers with mastic

Manually seal around ceiling registers with mastic

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Manually seal around ceiling registers with foil tape

Manually seal around ceiling registers with foil tape

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Manually seal seams in the air handler box with foil tape

Manually seal seams in the air handler box with foil tape

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Moisture Research - Optimizing Wall Assemblies

Reference

Report describing evaluation of several configurations of wall assemblies to determine the accuracy of moisture modeling and make recommendations to ensure durable, efficient assemblies.

Wrong – Duct is pulling away from floor because it is not sealed to floor

Wrong – Duct is pulling away from floor because it is not sealed to floor

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Wrong – Duct is pulling away from ceiling because it is not sealed to the ceiling

Wrong – Duct is pulling away from ceiling because it is not sealed to the ceiling

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Wrong - Batt insulation does not provide complete coverage across the attic floor so ceiling joists are exposed resulting in thermal bridging.

Wrong - Batt insulation does not provide complete coverage across the attic floor so ceiling joists are exposed resulting in thermal bridging.

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Multi-Family Construction Air Sealing Guide

Reference

Report providing guidance to air-sealing multifamily homes.

An IR camera image shows gaps around HVAC flue pipes allow conditioned air to leak through blown fiberglass into the attic

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Right - Spray foam insulation air-seals the ceiling-to-drywall seams at the wall top plate.

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Right - Closed-cell spray foam covers the ceiling and joists to insulate and air-seal the ceiling deck.

Right - Closed-cell spray foam covers the ceiling and joists to insulate and air-seal the ceiling deck.

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Adding air-sealing and rigid foam insulation at the wall-to-overhanging floor juncture at the outside corner of an existing home

Adding air-sealing and rigid foam insulation at the wall-to-overhanging floor juncture at the outside corner of an existing home

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Retrofit of cantilevered wall showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and closed-cell spray foam in the overhanging floor

Retrofit of cantilevered wall showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and closed-cell spray foam in the overhanging floor

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Retrofit of cantilevered wall with beam showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and overhanging floor

Retrofit of cantilevered wall with beam showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and overhanging floor

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Retrofit of cantilevered wall with beam showing details at the outside corner for installing air sealing and rigid foam insulation plus water control membrane in the wall and overhanging floor

Retrofit of cantilevered wall with beam showing details at the outside corner for installing air sealing and rigid foam insulation plus water control membrane in the wall and overhanging floor

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Retrofit of cantilevered wall showing details at the inside corner for installing air sealing and rigid foam insulation in the wall and overhanging floor

Retrofit of cantilevered wall showing details at the inside corner for installing air sealing and rigid foam insulation in the wall and overhanging floor

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Retrofit of cantilevered foundation wall showing details at the inside corner for installing closed-cell spray foam in the wall and overhanging floor

Retrofit of cantilevered foundation wall showing details at the inside corner for installing closed-cell spray foam in the wall and overhanging floor

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Adhesive caulk is used to seal seams and attach the multiple layers of rigid insulation

Adhesive caulk is used to seal seams and attach the multiple layers of rigid insulation

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Second layer of rigid insulation is adhered with foam

Second layer of rigid insulation is adhered with foam

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A second layer of rigid insulation is installed over the 2 in. by 4 in. retaining strip

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Run-out duct is sealed with mastic

Run-out duct is sealed with mastic

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