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Install all layers of the drainage plane to overlap, not underlap, to direct bulk water down and out of the wall.

Publication Date

Thu, 11/01/2007 - 12:00

Right - XPS foam insulation is attached to the existing exterior wall with wood furring strips that serve as a nail base for the siding and are installed vertically to allow for drainage and drying behind the siding

Spray foam extends down the inside of the foundation wall to the uninsulated slab; because the wall lacked exterior perimeter drainage, the slab was cut and an interior footing drain was installed.

Publication Date

Mon, 07/01/2013 - 12:00

Lower wall insulation installation

Publication Date

Mon, 09/01/2014 - 12:00

Upper wall insulation installation

Publication Date

Mon, 09/01/2014 - 12:00

Install minimum 6" wide self-adhered butyl Z-flashing

Publication Date

Mon, 09/01/2014 - 12:00

Upper wall insulation installation with butyl z-flashing

Publication Date

Mon, 09/01/2014 - 12:00

Tape the joint between the top insulation sheet and the Z-flashing with 2" wide tape to improve air tightness

Publication Date

Mon, 09/01/2014 - 12:00

Clean taping areas and install 3" tape on vertical joint of upper insulation overlapping the horizontal joint

Publication Date

Mon, 09/01/2014 - 12:00

Tape horizontal joint with minimum 3" wide tape placing tape offset high on the joint, adhearing to the upper sheet without wrinkles

Publication Date

Mon, 09/01/2014 - 12:00

Terminate 4" tape with 2" wide tape placing tape offset high on the joint, 2/3 of the tape should be adhered to the sheet of insulation

Publication Date

Mon, 09/01/2014 - 12:00

Spray Foam Interior Insulation for Existing Foundation Walls

Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.

Blown Insulation for Cavities of Existing Exterior Walls

Guide describing blown insulation into exterior wall cavities of existing homes with minimal disruption to occupants.

Exterior Insulation for Existing Foundation Walls

Guide describing how to insulate a new foundation wall or an existing foundation wall by adding rigid insulation to the exterior side.

Spray Foam Insulation for Cavities of Existing Exterior Walls

Guide describing how to insulate the walls of an existing home with spray foam insulation.

Spray Foam Insulation Applied over the Siding of Existing Exterior Walls

Guide describing how to install spray foam on the exterior of the existing home after framing over the existing siding.

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.