A Zig-Zag Bar, or Z-Bar for short, is a carpet to hard flooring bar used where there is a height difference between the surface layer of the product and the subfloor.
Generally speaking the standard Z-bars (usually aluminium or synthetic brass) work best at 12mm or slightly less. More premium bars allow for a greater range of heights from around 4mm to 13mm.
There are different types of bars available and if the height difference is less than 4mm then either a flat bar or single bar would be more appropriate.
Some specialist bars are available, however generally speaking at heights larger than 13mm it is unlikely the carpet would be sufficiently deep to provide a smooth, flat transition between the flooring types. In these instances the correct method would be to build up the Z-Bar using wedges or a shim to enable a smooth transition between heights.
The upright in the Z-Bar is shaped like the letter Z, and this allows the installer to gently tap the bar down onto the flooring giving a tight, clean finish.
At Grimley Flooring we are able to source a wide range of bars and finishing accessories to ensure a smooth and perfect finish to any installation.