Block on Flat Retaining Wall - External Render Problem

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Hi all
I few years ago I went halves with the neighbour to sort out a retaining wall that was in a bad shape....Its sorted structurally but the render is in a bit of a state. Mainly because there is earth up against the wall. The render while not comming away or anything is just green, paint peels off and it just looks a bit of a state etc. So as its us that facing the wall I was thinking of getting some of that split faced tile .......all down the length of wall to hopefully sort it out for a good while at least. It would look smarter

The root cause is just dampness but theres not much that can be done about that now. The only think I can think of is tanking the wall in its entirity first and then tiling to give a nice finish??? Would that work do you think - I will get good flexible adhesive. I dont fancy slate as that cant be difficult getting a good bond but something that just sticks and stays there

Ill have to ask if its OK to do as technically its their wall but I dont mind doing their side either as not mcuh wall showing above their ground level

Any tips and advice appreciated
 
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Yeh - definately cant do anything on the earthy side of the retaining wall (if that makse sense) and I dont actually want render now either...just want to tile over it essentially. Is this still "the way" even for tile? Thanks though been thinking a somethng long those lines too but nice to see in a drawing
 
I tiled my (dense block) retaining wall, knew it was a gamble, SBR primed the heck out of it, used decent quality adhesive etc, and although most of its fine, I’ve had a couple of issues where the adhesive has just completely popped off the substrate. So I’d say it’s too risky, and would go for the FMT separation approach. Just make sure the battens are always going to be totally protected.
 
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So battens on plastic sheet, the cement board and then tile then........will have a think, will add to the cost but its worth doing right....how far apart are the battens do you think as I know those cement boards are heavy, plus the tile so 600mm you think is enough???
 
Treated battens will rot if exposed to running water. There's only so much that deadly chemicals can prevent before it gets rinsed away. It's wood, nature wants to eat it as it's food.

IMO the mistake was painting it. You've put something waterproof over something damp, so it was bound to get pushed off. I'd just leave it, hopefully the damp will eventually strip it all or you could help it with a powerwasher.

Besides that, is there some gravel behind it on the retained side, and some sort of drainage path - e.g. holes through the walls or a route downhill away from it? If not then it could be added with some spadework on your neighbour's side.
 

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