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Insulating a crawlspace foundation with “cripple wall” in warm climates; in Climate Zones 5+ replace the foil- or plastic-faced fiberglass batt/roll insulation with impermeable rigid insulation or closed-cell spray polyurethane foam

Below Deck Spray Foam Insulation for Existing Roofs

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

Vented crawlspace foundation insulated at floor joist with rigid foam.

Publication Date

Mon, 03/01/2021 - 12:00

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.

Technology Solutions Case Study: Moisture Durability of Vapor Permeable Insulating Sheathing

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

October, 2013

Case study describing research about using exterior, vapor permeable insulation of retrofit walls with vapor permeable cavity insulation.

Rigid foam insulation can serve as the drainage plane when all seams are taped. Furring strips provide an air gap behind the cladding.

Publication Date

Sun, 04/01/2012 - 12:00

Condensation Control for Walls in Cold Weather

Guide describing ways to construct wall assemblies in cold climates to minimize the likelihood of condensation formation inside the walls.