- This application claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Application No. 61/006,729, filed Jan. 29, 2008, the entire contents of which are incorporated herein by reference. 
FIELD OF THE INVENTION- The present invention relates to a system for tiling roofs and other surfaces such that the resulting pattern allows for proper drainage and also has a distinctive appearance. In particular, the present invention relates to an improved system for tiling which utilizes tiles having a ⅔ or other unconventional fractional width interspersed in the rows of tiles, so that a more random and interesting look is achieved compared to conventional tiling systems. 
DESCRIPTION OF RELATED ART- A conventional system for tiling roofs is illustrated inFIG. 1. Tiles are attached to the roof in a series ofrows3 such that the desired portion of the roof to be protected, typically the entire roof, is covered by tiles. For systems employing shingle-type tiles, the tiles within a particular row substantially overlap the tiles of the next lower row. For systems employing flat interlocking-type tiles, the tiles within a particular row slightly overlap and interlock with the tiles of the next lower row. Preferably, ceramic tiles are employed. In either case, the majority of eachrow3 is made up of full-width tiles1, each having a same predetermined width in therow direction6. 
- The interfaces between adjacent tiles within a row make up border lines4 which provide for drainage of the roof. Preferably, the tiles are arranged such that none of the border lines4 of adjacent rows line up. This ensures that a central portion of eachtile1 is adjacent a border line4 in the nextlower row3, allowing for proper drainage of rainwater. 
- In order to easily provide such a desired arrangement, these systems also preferably employ tiles with overall dimensions generally the same as those of the full-width tiles1, except that their width in therow direction6 is one-half that of the predetermined width of the full-width tiles1. Such tiles are hereinafter referred to as half-width tiles2, and every other row starts with a half-width tile2 instead of a full-width tile1. This results in a regular, half-staggered pattern wherein, for each full-width tile1, there is a border line4 in the next lower row that lines up at the mid-point in therow direction6 of the full-width tile1. 
- Such a regular, half-staggered pattern of tiles allows for proper drainage. However, an irregular, pseudo-random pattern of tiles can be more interesting and aesthetically pleasing than a regular pattern, and accordingly a need exists for a system for tiling that provides an irregular, pseudo-random pattern of tiles while also allowing for proper drainage of rainwater. 
SUMMARY- A tiling system comprises a plurality of rows of tiles extending in a row direction across a surface, wherein at least one of the plurality of rows of tiles comprises a plurality of full-width tiles having a same predetermined width in the row direction and at least one partial-width tile, wherein each of the at least one partial-width tile has a fractional width in the row direction that is less than the predetermined width and is greater or less than one-half the predetermined width. 
- A method of tiling a surface with a plurality of rows of tiles extending in a row direction across the surface comprises positioning a plurality of full-width tiles having a same predetermined width in the row direction within each of the plurality of rows, and positioning at least one partial-width tile within one or more of the plurality of rows, wherein each of the at least one partial-width tile has a fractional width in the row direction that is less than the predetermined width and is greater or less than one-half the predetermined width. 
BRIEF DESCRIPTION OF THE DRAWING FIGURES- FIG. 1 is a tile configuration according to the conventional art. 
- FIG. 2 is a tile configuration according to an exemplary embodiment of the invention. 
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS- The tiling system according to an embodiment of the present invention is illustrated inFIG. 2. As in conventional tiling systems, tiles are attached to the roof in a series ofrows3 such that the desired portion of the roof to be protected, typically the entire roof, is covered by tiles. For systems employing shingle-type tiles, the tiles within a particular row substantially overlap the tiles of the next lower row. For systems employing flat interlocking-type tiles, the tiles within a particular row slightly overlap and interlock with the tiles of the next lower row. Preferably, ceramic tiles are employed. In either case, the majority of tiles in eachrow3 are full-width tiles1 having a same predetermined width in therow direction6. 
- The tiling system according to an embodiment of the present invention also employs tiles with overall dimensions generally the same as those of the full-width tiles1, except that their width in therow direction6 is two-thirds (⅔) that of the predetermined width of the full-width tiles1. Such tiles are hereinafter referred to as ⅔-width tiles5. 
- As in the conventional systems discussed above, every other row preferably starts with a half-width tile2 having a width in therow direction6 that is one-half that of the predetermined width of the full-width tiles1, instead of a full-width tile1. Additionally, the ⅔-width tiles5 are interspersed within therows3 in an irregular pattern. Optionally, half-width tiles2 are also interspersed within therows3 in an irregular pattern. As in the conventional systems discussed above, the interfaces between adjacent tiles within a row make up border lines4. To allow for proper drainage of rainwater, the ⅔width tiles5 and half-width tiles2 are positioned in therows3 such that a central portion of eachtile1 is adjacent a border line4 in the next lower row. It has been found that it is generally not necessary in allowing for proper drainage to position a border line4 below a central portion of each half-width tile2 and ⅔-width tile5. 
- In the system according to the illustrated embodiment of the present invention, the border lines4 below each full-width tile1 are either positioned at the mid-point in therow direction6 of the full-width tile1, or are positioned ⅓ or ⅙ of the predetermined width from an end of the full-width tile1 in therow direction6. It has been found that a border line4 allows for proper drainage of rainwater in any of the above-discussed positions below a full-width tile1. Also, unlike in the conventional art, a plurality of border lines4 can be positioned below a single full-width tile1 (see the multiple-drained full-width tile7 illustrated inFIG. 2). Furthermore, unlike in the conventional art, it is no longer necessary to ensure that no border lines4 of adjacent rows line up (see the lined-upborder lines8 ofFIG. 2). Accordingly, the utilization of ⅔-width tiles in the illustrated embodiment of the present invention results in an irregular, pseudo-random pattern of tiles that can be more interesting than a regular pattern. 
- Although the present invention has been described with reference to tiling of roofs with either shingle-type tiles or flat interlocking-type tiles, the present invention is not limited thereto, but can be utilized with any type of tile and with any type of tiled surface, including (but not limited to) floors, walls, counters, or outdoor walkways. 
- Furthermore, although present invention has been described as a system which utilizes half-width tiles and ⅔-width tiles, the present invention is not limited thereto. Other tiling systems utilizing interspersed tiles having a variety of unconventional, fractional widths to create an irregular, pseudo-random pattern while also allowing for proper drainage can be practiced without departing from the spirit and scope of the invention.