Get permission of the owner of the fence posts if it is not you!
Set a 150 X 25mm timber gravel board level ( or at the level you want it ) at the base of the battens you have attached to the concrete posts.Fix gravel board to the vertical battens. This will make it easier to space the battens with your spacer from then on?!. I used 4.8m long battens which do sag so best to use several spacers over this length.Check level regularly and adjust horizontal battens if necessary. If the timber is fresh and has moisture in it then there is less chance of the timber splitting. I use 50mm no 4 screws designed specifically for this type of timber. If the timber is dry it may be necessary to pre drill the screw holes first. Finished look here : [ Ссылка ]

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