Fence construction - mounting posts on uneven sandstone wall?

We have a sandstone wall made of thick, irregularly split blocks. It looks great, but how can we best mount our fence there? They are normal welded wire mesh panels with corresponding posts for screwing on. Has anyone ever faced this challenge? On the one hand, not all the stones are the same height, on the other hand, the comparatively small base plate sometimes sits crookedly on the irregular stone.

I would first stretch a string line and make it plumb. Then distribute the posts, drill holes, and as shown in the drawing, do not screw the posts directly onto the stone, but counter with a nut. This way you can level them properly. I assume there are 4 holes per base plate. Finally, the gaps between the base and the masonry are mortared.

Hi,

My suggestion:

Trace the outline of the feet on sandstone and lightly (level the depth) mill into the surface in the size of the feet. Of course, mill rounded instead of square like the feet :-/

Sandstone is quite soft (I have plenty of it at/ in my house)

That will probably look better and is also not much more "fiddly"

The only open question is where the water (if there is any) disappears from the small hollow.

But on sandstone, water evaporates quickly and if the feet are made of stainless steel or well powder-coated, hopefully that will not be a problem.

zapp

..... slightly (level depth) mill into the surface .....

I see - with one post that might still be funny
But if you have to bring, for example, 5 or 10 such posts to the same height, the task becomes very tricky.
But now comes the best part:
How do you get the hole/recess 3-axis (height, left/right, and front/back) plumb in a hollow in the stone?
Sorry Superzapp: But your suggestion has nothing to do with practice.

Hi

I would also work there with threaded rods, nuts, and washers made of stainless steel.
Bring the threaded rods roughly to the right height and finish them off at the top with a cap nut.

Olli

so so - with one post that might still be funny But if you have to bring 5 or 10 such posts to the same height, the task becomes very tricky. But now comes the best part: How do you get the hole / milling 3-axially (height, left/right and front/back) perfectly aligned in a recess in the stone? Sorry Superzapp: But your suggestion has nothing to do with practice.

I mean: "Mini milling table" with 3 set screws with very small tips (build yourself in max. 1 hour) ... level it on the stone (spirit level) Then put a small old router on it (last time I bought one for 15 euros at the flea market) - place it on top - mill (always the same depth with depth stop, because the milling table is levelled) - done ... In total no more time effort than aligning EACH foot with set screws. Because of that, I also lose support surface. That means the feet do not stand fully on the wall but only on the three or four screws. Therefore "wobbly" at least significantly reduced "bending strength" of the post.

... the comparatively small base plate ....

Especially important with the mentioned relatively small (how small?) base plate. The more I imagine it pictorially the less any other solution comes into question for me - both optically and technically Alternatively, create a small flat surface under each foot (all the same height) with two-component adhesive / resin (just with suitable material). But I think my above solution is better.