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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.

No Vapor Retarders on Interior Side of Air-Permeable Foundation Insulation

Vapor retarder plastic should not be installed over fibrous insulation on basement or crawlspace walls unless rigid foam or spray foam is installed directly against the concrete, behind the blanket insulation.

Damp-Proof Exterior Surface of Below-Grade Walls

Guide describing how to apply water management strategies to below grade walls.

There is no polyethylene sheeting installed in the crawlspace

Right – Polyethylene sheeting vapor barrier is installed and sealed to the crawlspace walls with mastic

Publication Date

Tue, 02/01/2011 - 12:00

Wrong – The polyethylene sheeting vapor barrier is not attached to the piers with mechanical fasteners

Publication Date

Tue, 02/01/2011 - 12:00

Capillary Break at Crawlspace Floors - Polyethylene Lapped Up Walls and Piers or Secured in the Ground

Guide describing how to create a capillary break at all crawlspace floors using polyethylene sheeting to manage moisture in crawlspaces.

Capillary Break at Crawlspace Floor - Polyethylene Sheeting under Concrete Slab

Guide describing how to install a capillary break to help manage moisture in foundations.

Footing Drain Pipe

Guide describing how to help drain water away from the perimeter footing.