Abstract: A piece of insulation has a body of insulating material and a vapor barrier sheet adhered to the body of insulating material. The vapor barrier sheet has a first tab extending beyond the body of insulating material. The vapor barrier sheet has a portion non-adhered to and overlapping the body of insulating material to form a second tab. A location is defined between the second tab of the vapor barrier sheet and the body of insulating material for receiving a first tab of another piece of insulation.

Abstract: A piece of insulation has a body of insulating material and a vapor barrier sheet adhered to the body of insulating material. The vapor barrier sheet has a first tab extending beyond the body of insulating material. The vapor barrier sheet has a portion non-adhered to and overlapping the body of insulating material to form a second tab. A location is defined between the second tab of the vapor barrier sheet and the body of insulating material for receiving a first tab of another piece of insulation.

Abstract: An improved insulation system is used to insulate the roof of a metal building. The insulation system includes insulating boards which are suspended beneath roof panels by flexible sheets of material. The flexible sheets are attached to structural members, that is, to purlins beneath the roof panels. The flexible sheets have a width which is greater than the width of the insulating boards so that longitudinally extending edge portions of the sheets project outwardly from the edges of the insulating boards. The edge portions of the sheets are connected with the purlins at locations above the insulating boards so that the flexible sheets hang downwardly to suspend the insulating boards beneath the roof panels without compressing the insulating boards.

Abstract: A method and apparatus is disclosed for installing insulation in metal buildings and the like. The apparatus includes a grid supported from the upper flanges of the purlins of the metal building and providing struts and shelves to support an insulation blanket below the upper flanges of the purlins. The shelves support the blanket along its edges and the struts support the blanket at intervals along its length. In accordance with the method, the grids are assembled and then pushed out along the purlins and are dropped down between the purlins while being supported from the upper flanges thereof. With such method, it is not necessary for workmen to work out along the purlins and the grids can be installed while the workmen stand on an end platform on panels of a partially completed roof.

Abstract: An insulation system is disclosed for installing insulation in existing metal buildings. The system includes extruded hat-shaped support members having a central wall portion mounted on the lower flange of the building purlins with screw fasteners or the like. The support member provides oppositely extending shelf portions on which are mounted bridging members. The bridging members are slotted or notched at their ends and fit over the shelf portions for mounting. Insulation is positioned over the shelf portions and is supported along its sides by said shelf portions. In one embodiment, rigid insulation panels have ends which fit into channels on the bridging members. In another embodiment, faced insulation blankets extend over the bridging members and are supported at intervals along their length by the bridging members and along their sides by the shelf portions. In such latter embodiment, strips of adhesive secure the facing of the blanket to the bridging members and support members.