Best way to fill in the holes?

 From:  -ash-
2347.8 In reply to 2347.7 
Thanks for all the replies - I'm at work at the moment so I'll try these out tonight.

Grendel - I was hoping to make it all one mesh and tag the windows with a different material.

Micheal - this looks more like what I had in mind.

I'll let you know how I get on. Cheers.