Answer:
What falls down but never breaks?
What is always on its way but never arrives?
What starts with a T ends with a T and is full of T?
What shoes should you wear when your basement is flooded?
What is used by man, tossed by trees, everywhere but unseen?
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.