For brickwork on my Berlin project i have used 7mm brick sheets from antenocitis workshop, this works well for new brickwork, but i have found that covering this with a single ply of Toilet roll (of all things) then stippling on watered down PVA gives the bricks texture, you can do this before cutting the styrene sheets for ease of application.
Good luck with the project.(It's nice to see someone else embarking on a big project)
Mike
p.s. if you are ever looking for cheap foamboard sheets Fred Aldous sells a 5mm A2 sheet for less than £2.00 each http://www.fredaldous.co.uk/foam-board- ... te-a2.html





