We would like to lay laminate flooring in the living room in our new house. It currently has carpet, and underneath that there is old laminate. Is it best to rip the old laminate out first? What is the best type of underlay to use? How long do you think it would take to do a room that is about 5m x 3.5m? We're hoping to do it before we move in next week, but not sure if we're being over ambitious! We're pretty handy at DIY, but haven't laid flooring before, so this is all new to us. Many thanks