a couple of pics of a small bridge that I made using the cork method. It will feature in a dio that I'm currently working on.

Great use of cork. Overall nicely done. One thing you may want to consider - on a stone arch the top piece is usually keystone shaped to apply downard and outward pressure on the stones below to give it support.
You may want to fill in the two triangles next to the center piece on the arch over the water. That will give you a keystone shape.

Very nice. Gotta try this myself some day....just like building all the kits on my shelves. :-) :-) Really, nice build. "Q" and with this post, I officicailly hit the 1000 mark. and there was much rejoicing... yay.

I like the bridge. What did you use a backer for the cork?

Brian - look close at the 1st picture - cardboard is the backer.
You can also use foam board it works too.
The building in the Built Review of the European balcony is cork over foam board.
Anything flat and stiff

good eye slodder took the words right out of my mouth! but other than that, looks very well done, are you going to leave it brick colored or paint them a grey/stone color? I think it would look good either way.

I'm curious if posterboard would have worked better as a backer as opposed to cardboard, I think that cardboard would be harder to work with because of its thickness? Are you going to cover the cardboard somehow where it spaces out on the sides?

nice job, cant wait to see the end results

Great job! it looks very real! This is a great method!
Cheers and happy modelling!
Prato

shain - Great minds think alike.

The backside of the cork projects need to be rigid, the weight of the cork and plaster/putty is pretty high.

I think Poster board in the typical Craft Store definition is to thin and flexible. PB in a US craft store is just really thick paper. Foam board was the thinnest stiffest alternate that is economical. There is heavy duty architect paper that would work but it's Really expensive.
If you need thin I would say to go with sheet styrene