Answer:
Iron roof, glass walls, burns and burns and never falls.
What has a neck and no head, two arms but no hands?
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
Voiceless it cries, wingless flutters, toothless bites, mouthless mutters.
What has to be broken before it can be used?
What covers its face with its hands, speaks no language, yet most known what it's saying?