In article ,
Pete C wrote:
On 05/03/2014 09:11, Andy Burns wrote:

My question was more about the rot resistance of untreated oak v.s.
treated softwood.

Oak will outlive treated softwood by decades.

Sorry, but that is so misleading as to be false.

Oak heartwood will outlast cheaply treated softwood by decades,
true, but oak sapwood will not last that long, and the most
aggressively treated softwoods (the old pressure-creosoted and
tanalised ones) will outlast oak heartwood by decades. What am
an not sure is how effective the tanalisation replacement is.


Regards,
Nick Maclaren.