http://imgur.com/a/3837a
check the maps screens in large to see the grid locations.

This building has it's windows broken, but at the same time not. They appear to be broken, and bullets will hit the interior if you shoot through, but even when shooting through the gap glass impact sounds still play as though the windows are not broken.

The door in the same building will not open, even though you can clearly see there is an interior within.

I have reproduced this on 2 of this building, with their map locations show in screenshots.