Patent ID: 6206991
Filing Date: 2001-03-27
Classification: E04D

Abstract:
A method for applying roof tiles with one-component, polyurethane adhesive to a roof, each roof tile having opposing leading and trailing edge portions intersecting with opposing side marginal edge portions, an underside surface adapted to face the roof and an outside surface adapted to face the elements when the roof tile is installed on the roof, said method comprising the acts of:a) dispensing for each tile, the adhesive as a bead in a contiguous integral U-shaped, bead pattern having top and bottom adhesive leg deposits extending from the leading edge portion a distance towards the trailing edge portion adjacent the upper and underside surfaces, respectively, of the tile and a bight bead adhesive deposit adjacent to and extending away from the leading edge portion, but integral with and connecting the top and bottom leg bead deposits;b) positioning an upper tile to partially overlie an immediately adjacent lower tile in that the upper tile's leading edge portion is adjacent the roof while the upper tile's trailing edge portion extends past the leading edge portion of an immediately adjacent lower tile so that the U-shaped bead pattern of the lower tile is sandwiched between roof tiles and roof by i) its bottom bead deposit in contact with the roof and the underside of the lower tile; ii) its top bead deposit in contact with the outside surface of the lower tile and the underside surface of the upper tile and iii) its bight bead deposit in contact with the roof, the underside surface of the upper tile and the leading edge portion of the lower tile; and pressing the upper tile against the roof and lower tile to cause the adhesive in the U-shaped sandwiched bead pattern to spread out into additional sealing contact areas while the tile is vertically aligned with an adjacent tile at a desired spaced distance from the roof;c) laying tiles side by side while repeating acts (a) and (b) for each placed tile to form a longitudinally extending tile course, each course, with the exception of the lowest first course, overlying a lower course, and each course, with the exception of the last, highest course, being overlaid by a higher course whereby, with the exception of the first and last courses, the tiles are secured to the roof by placing a single U-shaped bead pattern on each tile which becomes sandwiched into sealing contact with the roof and adjacent tiles as the tiles are laid into position; and,d) thereafter, bonding the tiles to the roof after the polyurethane adhesive has cured.