"And in order to do that we have to increase the sleeping quarters. We have to increase the housing capability basically, the environmental control and life support system aboard the complex as well."
Herring says the goal is to make living conditions on the space station less Spartan and reduce the stresses of living in space for long periods.
"You have to learn how to live with someone in a cramped environment, even though the space station obviously is not that cramped any longer because it's so big, you have to learn how to live with people, inter-act with people continuously."
The space shuttle Endeavour will deliver materials for the make-over when it launches Friday, and the current space station crew will do the work and install all the new stuff.
Jim Bell, KUHF, Houston Public Radio News.