Are fencing and cls timbers treated the same?

[restorationcouple]

Need to get some fencing put up this week and while I intend to use regular treated posts I need to decide on the rails.

The fence will be feathedge and built onto a wall with the posts bolted to the piers. Due to the spacing distance buying regular 3.6m lengths of rails will produce a lot of wastage. Can regular treated CLS be used instead? How does the pressure treatment compare between the two, I am assuming the same if not better as they are smooth?

 

[r896neo]

The treatment will be pretty much the same.

 

[restorationcouple]

I had assumed that was the case as I am sure they are batched through together anyway. Thanks for the confirmation!

 

[r896neo]

often cls is actually better as it may be vac vac rather than just tanalised.