Building surface system including vertical rails, and method of assembly

A method of forming a building surface system comprising:

• a support structure including a plurality of vertical rails that form a support surface, wherein the plurality of vertical rails comprises a first vertical rail including a longitudinal section and a vertical receiving slot in the longitudinal section;
• and
• a plurality of building surface products attached to the support structure, wherein the plurality of building surface products comprises a first building surface product including:
• a substantially planar panel having a first side, a second side, a first end, a second end, a front surface, a rear surface, and a gypsum body between the front surface and rear surface, and
• a first attachment post extending outward from the rear surface of the panel, the first attachment post including a shaft that penetrates the rear surface of the panel and a head that extends radially outward from the shaft at a distance from the rear surface of the panel, wherein the distance between the head and the rear surface of the panel is adjustable
• wherein the shaft of the first attachment post of the first building surface product extends through the vertical receiving slot of the first vertical rail and the longitudinal section of the first vertical rail is clamped between the head of the first attachment post and the rear surface of the panel so as to secure the first building surface product against the support structure, the method comprising:
• positioning the first building surface product in front of the support structure such that the rear surface of the panel of the first building surface product faces the support structure, a shaft of the first attachment post extends through the vertical receiving slot of the longitudinal section of the first vertical rail, and the head of the first attachment post is positioned behind the first vertical rail;
• and
• securing the first building surface product to the support structure by reducing the distance between the head of the first attachment post and the rear surface of the panel so as to clamp the first vertical rail between the head of the first attachment post and the rear surface of the panel.

A building surface system comprising:

• a support structure including a plurality of vertical rails that form a support surface, wherein the plurality of vertical rails comprises a first vertical rail including a longitudinal section and a vertical receiving slot in the longitudinal section;
• and
• a plurality of building surface products attached to the support structure, wherein the plurality of building surface products comprises a first building surface product including:
• a substantially planar panel having a first side, a second side, a first end, a second end, a front surface, a rear surface, and a gypsum body between the front surface and rear surface, and
• a first attachment post extending outward from the rear surface of the panel, the first attachment post including a shaft that penetrates the rear surface of the panel and a head that extends radially outward from the shaft at a distance from the rear surface of the panel, wherein the distance between the head and the rear surface of the panel is adjustable
• wherein the shaft of the first attachment post of the first building surface product extends through the vertical receiving slot of the first vertical rail and the longitudinal section of the first vertical rail is clamped between the head of the first attachment post and the rear surface of the panel so as to secure the first building surface product against the support structure,
• wherein the plurality of building surface products includes a second building surface product adjacent to the first building surface product, and wherein an attachment post of the second building surface product is received in the vertical receiving slot of the longitudinal section of the first vertical rail so as to secure the second building surface product against the support structure.