When using the Blender Game Engine, the parts of the model viewed through the windows becomes transparent and it's not a clipping problem. If I select a glass object the model viewed through the glass object shows up properly.
I have tried both solidify and double sided and it doesn't help. If I select a transparent object, the object then shows the model through the object. When I press play, then everything works right. In the image I have selected the 'glass door' on the left and the object can now been seen, but not through the other windows. I hope this is alright to answer like this, as I don't see away to include an image in my comments.