Original insulation trade vintage catalog for DU PONT COMPANY. Textile Fibers Department, was located in Wilmington, DE. Manufacturers of Tyvek Air Infiltration Barrier. Pictured is a Chicago area solar envelope home, which has no furnace or air conditioning, covered sidewall insulation with Tyvek to help keep the interior comfortable. How to install is shown. Unbound from a large 1982 architectural catalog, this unique old four page technical brochure would exhibit beautifully matted and framed. A fantastic addition to your retro insulation collection. Pages are detached and may contain a small amount of residual glue on edge.