Leaking external house wall

Hello,

The exterior walls of our house here in Taiwan have had some pebble dashing applied to supposedly make them more waterproof.

Here is a picture of the front of our house:



Here is a picture of the pebble dashing up close (millipede included as a bonus) :D:



The waterproofing hasn't worked. After heavy rain this week the inside walls have started bubbling up with a serious damp problem:



This has happened on every floor of the house.:mad:

Does anyone know what my options are here? Is it possible to put a waterproof coating over the pebble dashing? Does all of the pebble dashing need to be removed and a new coat applied?

Any help would be appreciated.

Many thanks,

Mark

Attached Images

   

Leaking external house wall