yes get treated timber but i would still seal it . the stuff i would use is sikkens HLS exterior wood stain there is a lot to the range like under coats top coats so go to place that has this stuff and ask advice i know jewsons have it .you can get it off the web as well [/list]
Click through to the DIYDoctor tool store where you can scroll down to "Paint" Click through and go to Woodcare. There is some 5 star wood preserver in there which will protect your timber fully and can be overstained/painted/varnished etc.
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