Double door about 2" wide. I find this the most useful as I am currently using them with the Heroic Maps Ancient Dungeons set.
The doors were first washed then undercoated black. I used the Vallejo black undercoat. Its designed for airbrushing (and works great for that) but it also works well when brushed on. The planks were basecoated with light brown. I picked a few planks out on each door to paint lighter or darker, I think this gives a more naturalistic look; after all, they were presumably all made by hand (or claw), so I try to avoid too much uniformity. A quick wash of sepia and the wood was just about done.
The bulk of the stonework was painted dark grey (VGC Charcoal?) then a few stone picked out in lighter colours. The whole lot was drybrushed in light grey to tie the different colours together. I'm not sure this works quite as well as the planks, and I'll try and tone it down a bit next time.
The ironwork was first painted in black, then picked out in chainmail.
I'll get some pics of the furniture up later today.