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The missing top plate in a kneewall was covered with lumber and rigid foam insulation and then sealed with spray foam

The missing top plate in a kneewall was covered with lumber and rigid foam insulation and then sealed with spray foam

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A typical Las Vegas hot-dry climate home made of wood frame construction and insulated with R-25 expanded polystyrene externally over a drainage plane, with an unvented wood frame insulated attic and roof assembly.

A typical Las Vegas hot-dry climate home made of wood frame construction and insulated with R-25 expanded polystyrene externally over a drainage plane, with an unvented wood frame insulated attic and roof assembly.

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Conceptual insulation practice at attic-style truss system - above unconditioned space

CAD File

Conceptual insulation practice at attic-style truss system - above conditioned space

CAD File

IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 2B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 2B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 3A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 3A: Vented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3A: Vented Attic, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 3B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 3B: Vented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3B: Vented Attic, 2x6 Wall, Monolithic Slab on Grade

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Limited attic access can make inspections for missing air barriers and insulation challenging

Limited attic access can make inspections for missing air barriers and insulation challenging

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Lateral Bracing in Gable End Walls

Guide

Guide describing how to brace gable end walls to resist wind pressures.

IECC Climate Zone 1A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 1A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 2A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 2A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade

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IECC Climate Zone 3A: Vented Cathedral Celling, 2x6 Wall, Vented Crawl Space

IECC Climate Zone 3A: Vented Cathedral Celling, 2x6 Wall, Vented Crawl Space

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Pumpkin Ridge Passive House Video #13: Completed Wall-to-Attic Air Barrier Details

Video

Video describing the wall-to-attic air barrier details of a passive house.

Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge

Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge

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Right - Continuous wall sheathing and blocking has been installed to brace the raised heel trusses.

Right - Continuous wall sheathing and blocking has been installed to brace the raised heel trusses.

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Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.

Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.

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Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall

Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall

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Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition

Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition

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The OSB roof decking product comes with an adhered radiant foil barrier which helps to prevent heat transfer in or out of the vented attic, while R-13 unfaced fiberglass fills the advanced-framed 2x6 walls.

The OSB roof decking product comes with an adhered radiant foil barrier which helps to prevent heat transfer in or out of the vented attic, while R-13 unfaced fiberglass fills the advanced-framed 2x6 walls.

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Right - Blocking has been installed between the ceiling joists and air sealed in place with canned spray foam to stop air flow beneath the attic knee wall.

Right - Blocking has been installed between the ceiling joists and air sealed in place with canned spray foam to stop air flow beneath the attic knee wall.

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A 1- and ½-story home with a room located in the attic and the thermal boundary located at either a) the walls and ceiling of the attic room with small vented attic spaces or b) the roof line for an unvented attic

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Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition

Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition

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Right – R-23 of blown fiberglass fills the walls and unvented vaulted attic cavities of this marine-climate home while an additional R-20 (4-inches) of graphite-enhanced expanded polystyrene is installed above the roof sheathing.

Right – R-23 of blown fiberglass fills the walls and unvented vaulted attic cavities of this marine-climate home while an additional R-20 (4-inches) of graphite-enhanced expanded polystyrene is installed above the roof sheathing.

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Dropped Ceiling/Soffit Below Unconditioned Attic

Guide

Guide describing how to insulate and air-seal dropped ceilings and soffits to prevent air leakage.

Builders Challenge High Performance Builder Spotlight: David Weekley Homes, Houston, Texas

Case Study

Case study describing new home construction in the hot-humid climate, optimizing thermal enclosure, HVAC, water heating and lighting measures.

Wind Washing

Guide

Guide describing wind washing of insulation in the eaves of vented attics and how to prevent it.

Air Sealing Drywall to Top Plate

Guide

Guide describing ways to seal drywall to the top plate of an exterior wall to air-seal the wall cavity.

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