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Batt insulation is installed in two layers with offset seams against the baffle to full code-required insulation height

Batt insulation is installed in two layers with offset seams against the baffle to full code-required insulation height

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Batt Insulation for Existing Vented Attics

Guide

Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.

Ducts in Dropped Ceilings

Guide

Guide describing method for installing ducts in a duct chase in a dropped ceiling.

Unvented Insulated Sloped Roofs

Guide

Guide describing construction of unvented, sloped, insulated roof assemblies in high wind zone areas.

Home Energy Guide - Techniques, Tactics, and Tips: Ice Dams

Reference

Article describing the causes that form ice dams, as well as solutions for preventing future ice dams on roofs, focusing on air sealing to prevent hot air leakage.

Walls Adjoining Porch Roof

Guide

This guide describes how to install a rigid air barrier to separate the porch attic from the conditioned space.

Spray Foam Insulation Applied to Existing Attic Floor

Guide

Guide describing how to apply spray foam insulation to the floor of the attic in existing homes.

Pre-Retrofit Assessment of Attics, Ceilings, and Roofs

Information Guide

Information guide describing things to consider in the attic, ceiling, or roof before attempting retrofits of items including HVAC, wiring, or structural systems.

DOE ZERH HIA 2017 Case Study: Thrive Home Builders, Courtyard Rows, Lone Tree, CO

Case Study

Case study describing a DOE Zero Energy Ready Home 2017 Housing Innovation Award winner that scored HERS 41 without PV and 8 with PV.

Pumpkin Ridge Passive House Video #010: Attic Truss Details

Video

Video describing the attic truss details in a passive house.

New Whole-House Solutions Case Study: Tom Walsh & Co., New Columbia, Portland, OR

Case Study

Case study describing a new construction building project of 20 homes that earned HERS scores that represent greater than 50% energy savings in heating and cooling over the 2004 IECC.

Right - The underside of the attic roof deck is insulated with open-cell spray foam to provide an insulated space for HVAC equipment.

Right - The underside of the attic roof deck is insulated with open-cell spray foam to provide an insulated space for HVAC equipment.

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The thermal boundary for a gable roof can be located at either a) the flat ceiling with a vented attic or b) the roof line for an unvented attic

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A low-sloped shed roof with the thermal boundary located at either a) the flat ceiling with a vented attic or b) the roof line for an unvented attic

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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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Unvented Attic Insulation

Guide

Guide describing methods for insulating an unvented attic along the roof line.

Spray foam insulation used for raised ceiling duct chase.

Spray foam insulation used for raised ceiling duct chase.

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Spray foam insulation used for raised ceiling duct chase

Spray foam insulation used for raised ceiling duct chase

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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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Encapsulated Ducts

Guide

Guide that illustrates how and when to encapsulate ductwork in unconditioned attics, increasing the R-value of duct insulation, mitigating condensation issues, and reducing air leakage.

Attic Ventilation Fans

Information Guide

Information guide describing the use of attic ventilation fans to mechanically pull outside air through the attic in an attempt to cool the attic, control moisture, and prevent ice dams.

Wrong - IR image is showing that attic access is missing weather stripping.

Wrong - IR image is showing that attic access is missing weather stripping.

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Form a sheet metal shield around the flue pipe

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Mold on the sheathing in this attic occurred after attic ventilation was increased

Mold on the sheathing in this attic occurred after attic ventilation was increased

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These baffles have a wind dam at the back which drops down into the rafter bay to serve as a backstop for insulation

These baffles have a wind dam at the back which drops down into the rafter bay to serve as a backstop for insulation

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Ducts Buried in Attic Insulation and Encapsulated

Guide

Guide describing approaches to burying and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

Form sheet metal shield around pipe keeping 3-inch clearance

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IECC Climate Zone 1A: Unvented Attic, 2x6 Wall, Monolithic Slab

IECC Climate Zone 1A: Unvented Attic, 2x6 Wall, Monolithic Slab

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

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

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IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Pier Foundation

IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Pier Foundation

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