Patent ID: 8869473

Claim:
An insulating cover assembly comprising: a continuous frame having spaced side walls and spaced end walls, said continuous frame defining a frame opening therethrough and including at least one downwardly depending flange extending therefrom so as to form an inverted L-shaped surface on at least one of said spaced side walls and said spaced end walls, said continuous frame having one leg of said inverted L shaped surface resting on the outside of an existing structural opening of a building defined by an opening frame of said building, and said downwardly depending flange extending into said opening frame and abutting two sides and a base flange of said opening frame; a removable closure member, said removable closure member including: a depending central portion, said depending central portion being sized and shaped to fit within said frame opening and engage each of said side walls and said end walls of said continuous frame inside said frame opening to create a first continuous seal with said continuous frame when said removable closure member is positioned on said frame in a covering relationship with respect to said frame opening; and an upper portion forming flanges, said flanges extending laterally outward relative to said depending central portion, said flanges being sized and shaped to engage an upper surface of each of said side walls and end walls to create a second continuous seal with said continuous frame when said removable closure member is positioned on said frame in covering relationship with respect to said opening defined by said continuous frame; wherein said closure member is completely detached from said continuous frame when said first continuous seal and said second continuous seal are broken; and wherein said first continuous seal and said second continuous seal are substantially perpendicular.