Method of forming a building structure incorporating a seamless tube useful to make roofing battens and related method

A method of forming a building structure, comprising the steps of:

• disposing at least one flexible, water-impervious sheet membrane onto a building structure substrate so as to seal said building structure substrate against liquid penetration, said at least one flexible, water-impervious sheet membrane being capable of being affixed to said building structure substrate by means of a plurality of mechanical fasteners arranged in a plurality of laterally spaced, longitudinally extending rows;
• disposing a plurality of roofing battens atop said at least one flexible, water-impervious sheet membrane such that said plurality of roofing battens respectively extend along said plurality of laterally spaced, longitudinally extending rows defined by said mechanical fasteners;
• and
• inserting said plurality of mechanical fasteners through said plurality of roofing battens so as to secure said plurality of roofing battens atop said at least one flexible, water-impervious sheet membrane and thereby, in turn, secure said at least one flexible, water-impervious sheet membrane to said building structure substrate, the improvement comprising:
• forming each one of said plurality of roofing battens by extruding a polymeric material so as to form a seamless tube having a longitudinal axial extent;
• flattening said seamless tube along said longitudinal axial extent so as to define two superimposed roofing batten plies integrally connected together along oppositely disposed, laterally spaced, longitudinally extending side edge portions thereof and with a substantially collapsed lumen defined therebetween;
• orienting said seamless tube longitudinally;
• punching holes through both of said two roofing batten plies of said flattened seamless tube at spaced intervals along said longitudinal axial extent of said flattened seamless tube, wherein each hole within one of said two superimposed roofing batten plies is coaxially aligned with a hole within the other one of said two superimposed roofing batten plies, for receiving said plurality of mechanical fasteners for securing said roofing batten atop said at least one flexible, water-impervious sheet membrane and to said building structure substrate;
• and cutting said flattened seamless tube, having said holes provided therein, to predetermined lengths so as to define said plurality of roofing battens having said predetermined lengths such that each one of said plurality of roofing battens extends at least between two axially spaced positions at which at least two of said plurality of mechanical fasteners, arranged within said longitudinally extending, laterally spaced rows, are disposed.