Hoping the Singletrack Hive-mind can help me with a fencing conundrum.

Need to replace my fence, looking at a feather board / closeboard type. Garden slopes from back left corner down to front right (diagonal) and curves around (again b-l to f-r) with each angle being much greater than 90 degrees.

Trying to work out what to do with the arris rail where it joins the fence post. The slope and the corners exclude the metal brackets. The complicated angle (slope and corner) would make cutting the post hard. Current thinking is to mitre the arris rail and make a pair of mitred battons for each joint (and screw these to the post and rail).

Any better ideas? Prefer a closeboard fence as it’s a windy location and they can follow the slope, rather than stepping down like panels. Even with stepped panels I’d need to rip cut a long wedge (or the post) to go between the panel and the post.

Mortise and tenon joint from arris rail to post, make the hole oversized to allow a bit of wiggle room. A decent fencing supplier will do the holes for you if you give them the heights you want.

That makes sense. Had only ever seen the kind where the fence post has a v-shaped notch cut in it.

Would you screw or nail through the mortise and tenon, or does it hold together on its own?

I’m a very amateur diyer but needed to measure a curved fence so soaked lengths of 3×1 and bent it around the posts. Amazingly it worked and remains in place several years later. I appreciate this may not suit your situation and your skill level may be well above mine (most people’s is).

If the mortice idea isn’t your bag put in 6×4 posts and on the sides of the posts put a 3×1.5 ‘fillet’ and fix 3×2 or 4×2 between the posts and feather board from post to post..

Windy location? Consider double palisade fencing (also seen it called hit and miss)