On Mon, 11 Mar 2019 10:57:20 +0000 (GMT+00:00), Jim K.. wrote:

Not sure that properly tanalised timber weathers grey. Our gates
haven't after well over ten years, they still have a weak greenish
tinge and definately aren't grey.

I believe it does weather to grey by UV action. Do your gates get
any sun?

Good point! B-) Not full sun at midday but they do catch the sun
but possibly too early or late in the day for really high levels of
UV.

--
Cheers
Dave.