Advanced Metal Knowledge

Corten vs Linier ­™

This article will examine the differences between two architectural finishes for raised planter edging, Corten and Linier™.  Corten, or weathering steel, is a steel type which has become increasingly popular and well used over the last few years.  Linier™ is very niche compared to Corten but it is a good alternative.  Although it has a different colour both finishes share a similar post-industrial aesthetic. 

What is Linier ™? 

Linier™ is a finish developed by Logic Bespoke at the request of several landscape architects and specifiers who wanted an alternative to Corten which they felt was becoming overused.  The base material of Linier is galvanised mild steel, which means that Linier™ is corrosion resistant.  After galvanising, the steel undergoes a two-part treatment process to achieve the final finish. 

Linier™ features a mottled grey and navy post-industrial aesthetic.  In bright sunlight, shades of red and pink can be seen.   

Part of Linier’s appeal is that no two sections are ever identical in pattern or colour, although there is a common theme, like natural stone such as Granite. 

For more information about Linier™, read our blog here. 

What is Corten? 

Corten is a group of steel alloys which forms its characteristic rusty appearance after weathering outdoors. The correct name for Corten is actually weathering steel. Corten is merely a brand of weathering steel. 

Corten develops a surface layer of rust thanks to the distribution of alloyed elements in the steel.  This process is called weathering. The surface layer protects the steel underneath from rusting further.  Over time, usually 6 months to 2 years, the Corten will fully self-seal – this is where the rust layer has reached its maximum thickness, and the steel will be stable.  Also, when Corten is fully self-sealed it will stop leaching rust-coloured runoff and the surface will be clean to touch – no rust oxide will come off. 

For more information about Corten, read our blog here. 

Linier Advantages 

  • There is zero risk of leaching or runoff 
  • Completely maintenance free 
  • Original, eye catching aesthetic 
  • No change in appearance over time 
  • Corrosion resistance thanks to galvanised finish 

Linier Disadvantages 

  • Slightly more expensive than Corten 

Corten Advantages 

  • It is like a living material in that the appearance changes over time 
  • Rugged Aesthetic 
  • More cost effective compared to Linier 

Corten Disadvantages 

  • Corten is not suitable for marine environments. Due to potential continuing corrosion issues (as a rule of thumb up to 5km from the coastline) 
  • Need to think carefully about the potential risk of runoff 
  • Not to everyone’s taste – some people would just view it as ‘rusty’ 

Conclusion 

Linier is a very competent alternative to Corten because there are fewer potential pitfalls, such as continuing corrosion and runoff to avoid. 

The two finishes have a very different aesthetic, so the choice is likely to be subjective and down to personal preference.  If you want the rusted Corten look, then obviously Linier is not an option.  However, if you want a post-industrial aesthetic but do not want any of the issues listed above, then Linier is a great option. 

Sources 

https://logic-bespoke.com/corten-vs-weathering-steel/

https://logic-bespoke.com/what-is-linier/

https://en.wikipedia.org/wiki/Weathering_steel

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