New Terrain project

[manrogue]

Spoke to Luke ages ago about this but i would love to do a complete building complex, with you able to use take roofs off bunkers and the like and fully use the interiors.
So as little practise and for a change from ruins i decided to create a small warehouse and though not complete would like a little feedback on it.

From most actual warehouses i worked in there is little in the way of windows, so i've not put any on the outside. I've tried to create a roller shutter on the outside,which i will mirror inside as well. I've tried to create a corrugated steel roof effect.

for the inside i've created a small office, with windows and door. The roof is attached by a flap, though i'm not sure on whether to keep it attched this way or not.
Thoughts? Ways to improve?