BASC Search | Building America Solution Center

Design the roof with raised heel trusses to allow full insulation over the top plates of the exterior walls.

Design the roof with raised heel trusses to allow full insulation over the top plates of the exterior walls.

Image

In cathedral ceilings, parallel chord trusses allow thicker insulation levels over the exterior wall top plates.

In cathedral ceilings, parallel chord trusses allow thicker insulation levels over the exterior wall top plates.

Image

Standard roof trusses are narrow at the eaves, preventing full insulation coverage over the top plate of the exterior walls

Image

Right – This attic knee wall and the floor joist cavity openings beneath it are being sealed and insulated with spray foam.

Right – This attic knee wall and the floor joist cavity openings beneath it are being sealed and insulated with spray foam.

Image

Attic Eave Minimum Insulation

Guide

Guide providing guidance on insulating attic eaves in new and existing single-family homes and multifamily buildings.

The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

Image

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

Image

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.

Image

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.

Image

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

Image

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

Image

Existing Whole-House Solutions Case Study: Deep Energy Retrofit in the Pacific Northwest

Case Study

Case study describing a whole-house, deep energy retrofit project in the marine climate.