In Scotland, railings were traditionally made using a "top-to-bottom" construction, with horizontal and vertical bars woven alternately around or into each other, creating a structure almost impossible to dismantle.[3]​ The rack was left open.[18]​ The usual method was to build the yett in quadrants with all the bars in a quadrant passing vertically or horizontally through the tie bars as shown in the photograph. This method of construction for doors is not seen outside Scotland, although window grills constructed in this way are found in northern Italy and Tyrol.[10]​.

Barred windows in the Scottish style were traditional in Tyrol in the 19th century, and a century later similar bars are seen in Venice, particularly in the Doge's Palace of the century (although the bars are somewhat larger than those used in Scotland).[19] It is likely that use spread southwards from Tyrol to the Republic of Venice, but with little apparent connection with earlier Scottish technology, although there was some trade between Scotland and Germany.[19]

Lattice iron gates were found in England, but they were constructed by a different method.[4] For the English-style gate, all the vertical bars passed in front of the horizontal bars and were riveted or fixed in place; the spaces were filled with oak, making the door solid.[18] However, one notable exception was built using the Scottish method: a castle at Streatlam, which is now housed in the Bowes Museum at nearby Barnard Castle. Streatlam was rebuilt by Sir George Bowes following damage in the century; The Bowes family had connections in Scotland, which may have inspired the construction of the still.[20]​.

Since the yetts were immensely heavy and there is little evidence to suggest that they were prefabricated, it is possible that many were made locally rather than transported over great distances, either by local blacksmiths or traveling specialists.[21] However, the yetts and window bars of Scottish royal palaces were custom-made at the Royal Artillery smithy at Edinburgh Castle and transported to houses such as Falkland Palace, Hamilton Palace and the Linlithgow Palace,[22]​ and some for Stirling Castle were made at Linlithgow.[23]​ Conventionally, window bars were built into the stone window frames.[21]​.

Some price data for the comparative cost of yetts survives in old accounts. In 1515, blacksmith Robert Scott and his brother were paid about £8 Scots for work on Hume Castle. The iron itself cost between £17 and £6 with £1 worth of coal. Records show that a yett built in 1568 for Kilravock Castle by a local blacksmith weighed 34 stone, £3 and cost £34-3s-9d and "three capsules of flour, one butter and one cheese".

In Scotland, railings were traditionally made using a "top-to-bottom" construction, with horizontal and vertical bars woven alternately around or into each other, creating a structure almost impossible to dismantle.[3]​ The rack was left open.[18]​ The usual method was to build the yett in quadrants with all the bars in a quadrant passing vertically or horizontally through the tie bars as shown in the photograph. This method of construction for doors is not seen outside Scotland, although window grills constructed in this way are found in northern Italy and Tyrol.[10]​.

Barred windows in the Scottish style were traditional in Tyrol in the 19th century, and a century later similar bars are seen in Venice, particularly in the Doge's Palace of the century (although the bars are somewhat larger than those used in Scotland).[19] It is likely that use spread southwards from Tyrol to the Republic of Venice, but with little apparent connection with earlier Scottish technology, although there was some trade between Scotland and Germany.[19]

Lattice iron gates were found in England, but they were constructed by a different method.[4] For the English-style gate, all the vertical bars passed in front of the horizontal bars and were riveted or fixed in place; the spaces were filled with oak, making the door solid.[18] However, one notable exception was built using the Scottish method: a castle at Streatlam, which is now housed in the Bowes Museum at nearby Barnard Castle. Streatlam was rebuilt by Sir George Bowes following damage in the century; The Bowes family had connections in Scotland, which may have inspired the construction of the still.[20]​.

Since the yetts were immensely heavy and there is little evidence to suggest that they were prefabricated, it is possible that many were made locally rather than transported over great distances, either by local blacksmiths or traveling specialists.[21] However, the yetts and window bars of Scottish royal palaces were custom-made at the Royal Artillery smithy at Edinburgh Castle and transported to houses such as Falkland Palace, Hamilton Palace and the Linlithgow Palace,[22]​ and some for Stirling Castle were made at Linlithgow.[23]​ Conventionally, window bars were built into the stone window frames.[21]​.

Some price data for the comparative cost of yetts survives in old accounts. In 1515, blacksmith Robert Scott and his brother were paid about £8 Scots for work on Hume Castle. The iron itself cost between £17 and £6 with £1 worth of coal. Records show that a yett built in 1568 for Kilravock Castle by a local blacksmith weighed 34 stone, £3 and cost £34-3s-9d and "three capsules of flour, one butter and one cheese".