Insulated wall construction having a clip and fastener therein

In an insulated wall construction, the combination of:

• a substrate defining a wall surface;
• at least two compressible, foamed plastic, insulation boards having a compression strength of between approximately 10 to 60 psi and being of predetermined thickness and butted together along outside edges thereof and positioned over said wall surface of said substrate with one face of said insulation board contiguous to said wall surface of said substrate;
• a plurality of clips each comprising a generally flat plate of non-corrosive material positioned with one flat face thereof contiguous to the other face of said insulation boards, some of said clips spanning the butted edges of said insulation boards and other of said clips positioned between the edges of each insulation board, each of said flat plates being of predetermined dimensions for providing a bearing surface having an area of at least 1 square inch against the compressible insulation boards, at least two prongs extending generally perpendicularly outwardly from the one face of each of said plates and being of a predetermined length less than the predetermined thickness of said insulation boards and partially penetrating said insulation boards for securing said clip to said insulation boards and for connecting said insulation boards through said clips spanning the butted edges, and a centrally positioned aperture in each of said plates, and
• elongate fasteners each having a head on one end thereof of approximately 5 times less surface area than said plate of said clip and of greater dimensions than said aperture in said plate, said fasteners being of a predetermined length at least 3/8 inch greater than the predetermined thickness of said insulation boards and each extending through respective ones said apertures and generally perpendicularly outwardly from the one face of said plate with said fastener head being retained on generally the other face of said plate, and said fasteners penetrating through said insulation boards and into said substrate for securing said insulation boards to said substrate while being restrained by said clip from undesired compression of said insulation boards.