Abstract: An adjustable insulation containment apparatus for insulating about duct work having a plurality of foldable sections or members that can be selectively ganged together by connection to each other to make a run. The members can be adjusted for width of the conduit. Alternatively, the apparatus can be formed by a pair of scored planar sheets held in position by end panels and spacers.

Abstract: An insulation containment apparatus includes a pair of side panels and a plurality of spacer panels. The side panels are flexible and allow the apparatus to be compressed by accordianing for storage and transport. The apparatus is expanded to form a containment area between the side panels that is placed over a duct. The containment area is then filled with insulation to insulate the duct. Openings are provided in the spacer panels to receive the duct. Stakes are also provided to secure the apparatus in a particular location.