Greg, thanks and glad you're wow'ed.
Lots more to go, remember your plastering for the Chosin Resevoir you did, well there will be lots of plastering for the buildings
Anyway here's the back and more roofing...
I use mainly balsa for flooring, window ledge, steps and doors. They're easy to cut to the thickness that I want and can be scribed just like the floor panels with the end of a fine tipped water proof ink pen. I hope when I stain the wood the lines would still show through. Before that I plastered the walls. To get it smooth I waited for the thick layer to semi harden then using a wet spatula to do the final finish. The balsa roof frames were pre-painted before installing.
To remove the wood grains from the window ledge balsa I coated it with diluted plaster and stippled it with a brush to look like stone. The loft window sections were plastered and top front with louvered strips from card. Window doors is balsa with plastic strip hinges and sliced rod for bolts. I will have to fashion handles later.
Here the stairs is balsa...this corner will later look different with wall supports for the stairs.
More to come...
Cheers,
Richard