Roofing membrane with selvage edges and associated method and article

A method comprising:

• (a) obtaining a first membrane comprising:
• (i) a first sheet having:
• a first top surface, and
• a first bottom surface opposite the first top surface, the first bottom surface having:
• a first edge portion,
• a second edge portion opposite the first edge portion,
• a third edge portion extending between the first and second edge portions,
• a fourth edge portion opposite the third edge portion and extending between the first and second edge portions, and
• a middle portion disposed apart from the first, second, third, and fourth edge portions,
• (ii) a first adhesive disposed on the middle portion of the first bottom surface,
• wherein at least the first, second, and fourth edge portions of the first bottom surface are free of adhesive, and
• (iii) a first removable liner covering the first adhesive;
• (b) removing the first removable liner from the first adhesive, to thereby expose the first adhesive;
• (c) contacting the first adhesive of the first membrane to a roof deck, to thereby adhere the first membrane to the roof deck;
• (d) obtaining a second membrane comprising:
• (i) a second sheet having:
• a second top surface, and
• a second bottom surface opposite the second top surface, the second bottom surface having:
• a first edge portion,
• a second edge portion opposite the first edge portion,
• a third edge portion extending between the first and second edge portions,
• a fourth edge portion opposite the third edge portion and extending between the first and second edge portions, and
• a middle portion disposed apart from the first, second, third, and fourth edge portions,
• (ii) a second adhesive disposed on the middle portion of the second bottom surface and at least one of the third edge portion or the fourth edge portion of the second bottom surface, and
• wherein at least the first and second edge portions of the second bottom surface are free of adhesive, and
• (iii) a second removable liner covering the second adhesive;
• (e) removing the second removable liner from the second adhesive, to thereby expose the second adhesive;
• (f) contacting the second adhesive of the second membrane to the roof deck, to thereby adhere the second membrane to the roof deck, wherein at least one of the third edge portion or the fourth edge portion of the second bottom surface overlaps with at least one of the third edge portion or the fourth edge portion of the first bottom surface;
• and
• (g) welding or adhering via the second adhesive the at least one of the third edge portion or the fourth edge portion of the second bottom surface to the at least one of the third edge portion or the fourth edge portion of the first bottom surface.

A roofing system comprising:

• (a) a roof deck;
• (b) a first membrane comprising:
• a first sheet having:
• a first top surface, and
• a first bottom surface opposite the first top surface, the first bottom surface having:
• a first edge portion,
• a second edge portion opposite the first edge portion,
• a third edge portion extending between the first and second edge portions,
• a fourth edge portion opposite the third edge portion and extending between the first and second edge portions, and
• a middle portion disposed apart from the first, second, third, and fourth edge portions,
• a first adhesive disposed on the middle portion of the first bottom surface,
• wherein at least the first, second, and fourth edge portions of the first bottom surface are free of adhesive;
• and
• (c) a second membrane comprising:
• a second sheet having:
• a second top surface, and
• a second bottom surface opposite the second top surface, the second bottom surface having:
• a first edge portion,
• a second edge portion opposite the first edge portion,
• a third edge portion extending between the first and second edge portions,
• a fourth edge portion opposite the third edge portion and extending between the first and second edge portions, and
• a middle portion disposed apart from the first, second, third, and fourth edge portions,
• a second adhesive disposed on the middle portion of the second bottom surface and at least one of the first edge portion or the second edge portion of the second bottom surface, and
• wherein at least the third and fourth edge portions of the second bottom surface are free of adhesive,
• wherein the first adhesive adheres the first membrane to the roof deck,
• wherein the second adhesive adheres the second membrane to the roof deck,
• wherein at least one of the first edge portion or the second edge portion of the second bottom surface overlaps with at least one of the first edge portion or the second edge portion of the first bottom surface, and
• wherein the at least one of the first edge portion or the second edge portion of the second bottom surface is welded or adhered via the second adhesive to the at least one of the first edge portion or the second edge portion of the first bottom surface.