Repairing a poor flaking pebbledash render

[dominoman]

I have a garage at the end of my garden that has been pebbledashed and then painted.

The render is flaking badly and in many places is just lifting off in chunks.

What can I do with it to patch it up? Does the whole surface need to come off, or could I patch it with a cement mix? The wall will eventually be covered by climbing roses so I don't need a perfect finish.

The other problem is that water wicks up the render from the patio.

Any advice would be much appreciated.

 

[dominoman]

What would you do with the above if it was yours?

Would you try and DIY patch it with some render, or should I just hack it all off and get it professionally rendered again?

It has a lump pebbly appearance. If I wanted to patch it how is that acheived? It looks as if pebbles were mixed into the concrete mix?