Mathematical tile

They would then be hung on a lath of wood, and the lower sections would be moulded together with an infill of lime mortar to form a flat surface.

[18] A 1987 count of surviving mathematical tiles in English counties found the most in Kent (407 buildings), followed by Sussex (382), Wiltshire (50), Surrey (47), and Hampshire (37 including the Isle of Wight).

[19] The black glazed type is most closely associated with the Brighton's early architecture:[1] such tiles had the extra advantage of reflecting light in a visually attractive way.

[20] Black mathematical tiles started to appear in the 1760s, soon after the town began to grow in earnest as its reputation as a health resort became known.

[23] When Pool Valley—the site where a winterbourne drained into the English Channel—was built over in the 1790s, one of the first buildings erected there was a mathematical tiled two-storey shop.

[3] Lewes, the county town of East Sussex, has many buildings clad with mathematical tiles in black and other colours.

These include the Grade I-listed Jireh Chapel in the Cliffe area of the town which is clad in red mathematical tiles and dark grey slate.

Mathematical tiles nailed to wooden planks, overlapped and mortared to give the appearance of a brick surface
9 Pool Valley, Brighton has a black tile façade of 1794.
Black glazed mathematical tiles—as seen here at 44 Old Steine —are a characteristic feature of Brighton 's 18th-century architecture.