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Clean the attic floor of debris prior to installing new attic insulation. Use baffles to provide a path for ventilation air entering the attic from the soffit vents

Publication Date

Mon, 02/01/2010 - 12:00

Blown Insulation for Existing Vented Attic

Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.

Batt Insulation for Existing Vented Attics

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

Spray Foam Insulation Applied to Existing Attic Floor

Guide describing how to apply spray foam insulation to ceilings in existing homes.

Seal all drywall-to-top plate seams and penetrations at the attic floor

Publication Date

Mon, 02/01/2010 - 12:00

Batt insulation is installed in two layers in perpendicular directions against the baffle to full required insulation height

Publication Date

Thu, 09/10/2015 - 12:00

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

Publication Date

Thu, 09/10/2015 - 12:00

Seal the drywall to top-plate seams and the lower edge of baffles to the top plate to prevent the air coming from soffit vents from flowing under baffles into insulation.

Publication Date

Mon, 02/01/2010 - 12:00

Home Performance Assessment

Information guide describing how to apply a whole-house approach to home improvement with energy efficiency upgrades, improved indoor air quality, and increased comfort.

Water Managed Roof – Re-roofing and Adding Insulation Over a Sloped Roof

Guide describing how to re-roof an existing home with a sloped and add insulation above the roof deck.

Whole-House Fans

Guide describing the types of whole-house fans, installation details to reduce energy loss, and how to operate them for comfort and energy savings based on climate zone.

Existing Skylights Repaired or Replaced and Fully Flashed

Guide describing how to repair or replace skylights in existing homes.

Rigid Foam Insulation for Existing Exterior Walls

Guide describing how to apply an air control layer directly over existing wall sheathing and cover with two layers of insulating sheathing held in place by vertical furring strips.