Extruded core sections for wood fenestration mounting frames and sashes

A fenestration for a building having a fenestration-receiving opening therein, which includes:

• a mounting frame assembly for fitting within the building opening;
• and
• a glazed sash assembly which fits within the mounting frame and includes a sash and a glazing carried by the sash;
• wherein the improvement comprises:
• said mounting frame having head, sill and side jamb members, each of which includes interior members, exterior members and a shaped extruded plastic core having means for securement to interior member and means for securement to said exterior members;
• said sash having head, sill and stile members, each of which includes interior members, exterior members, glazing and a shaped extruded plastic core having means for securement of said interior members thereto, means for securement of said exterior members thereto and means for securement of said glazing thereto;
• and wherein each of said sash and frame interior and exterior members are selected from a group of members having a plurality of predetermined surface finishes;
• and
• wherein said frame core has an I-beam-like shape having:
• a web;
• an outer exterior flange;
• an outer interior flange;
• an inner exterior flange;
• an elongated step-like inner interior flange which terminates in a T-shaped section having a seal carrying section thereon positioned on the exterior facing surface thereof;
• said outer exterior flange, web and inner exterior flange defining an exterior frame component securement section;
• said outer interior flange, web and inner interior flange defining a frame receiving section;
• and
• a rim-shaped sealing member positioned in said sealing section and constructed to extend about said corners and the ends about at the top thereof so as to define a substantially rectangularly-shaped seal and only a single sealing junction.