Guides A-Z

This guide provides information about installing Insulating sheathing above the roof deck on existing homes. This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic.

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

Guide describing application of a radiant barrier layer in the attic to block radiant heat transfer between hot surfaces and heat-absorbing surfaces.

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

Guide describing how to add spray foam insulation to the underside of the existing roof deck.

Information guide describing how to calculate ventilation area in existing roofs.

This measure guide describes basic steps for installing ceiling fans.

Guide describing how to air seal and insulate a ceiling.

Guide describing how to insulate and air seal dropped ceilings and soffits to prevent air leakage.

Guide describing method for designing and installing ducts in a raised ceiling chase. 

This guide describes approaches to buryng and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

Guide describing method for installing ducts in a duct chase above a dropped ceiling.

Guide describing air sealing of non-ICAT recessed lights installed in accessible attics of existing homes.

Guide with information about how to upgrade a garage ceiling when a portion of the interior of the house is located directly above the attached garage by adding insulation and air sealing.

Information guide describing how to assess attics, ceilings and roofs before proceeding with upgrades in existing homes.

Guide describing insulation techniques for skylight shaft walls.

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

Guide describing wind washing and how to prevent it.