Over hanging concrete slab and damp issues

Hoping to get some ideas to fix this issue with 2 bedrooms on front of house which are on concrete slab.

Rooms were added ~1982 to existing timber floor/bricks pier structure and are the south side on house.
Most of the slab on these 2 rooms extends out past the single brick wall from 0-100mm and as far as I can tell the bottom plate is at the same level as the visible slab surface ie not above the bottom rows of bricks.

Have mold issues with these 2 rooms and previous carpet was damp affected in patches.

Any ideas/suggestions on how to stop/reduce moisture from rain on bricks running down and wicking above damp proof membrane ( in pics as black/silver metallic foil sheet on top of slab surface).

Thought of mortar angled ramp to deflect water away and using water repellent coating on lower 3-6 courses of bricks??
Web search also suggested using some metal/aluminium angle to cover damp membrane and stop water pooling at base??

Eventually want to render bricks as well.

Cheers.

[img=561x314]https://forum.homeone.com.au/u/84506_1529653005.jpg[/img]
[img=562x341]https://forum.homeone.com.au/u/84506_1529653065.jpg[/img]

Sorry pics attached again