Slab for garage - detailing

[Moonshine]

I am putting a 150mm slab down (with embedded mesh for a garage / outbuilding, its going to be mainly timber with one external wall masonry, the rest of the external walls are going to be timber.

 

a few questions

 

• Does the slab need to be the same sides at the wall outline, as below to stop water ingress, is this also the case on the wall that is going to be masonry? any edge thickening required?
• I going to embed a 50mm twin wall conduit in the slab that comes up within the wall line to get electrics and internet into the building, and run in the timber frame.

Edited November 16, 2021 by Moonshine