We have varnished bare floorboards in the hall upstairs. They are extremely creaky, sometimes it sounds like I might break one (although I know I won't, just the sound they make). The floor is only about 10 years old, and the boards look sound, no rot or anything visible. The creaking drives me mad though! Trying to creep anywhere while the baby sleeps or if I want to visit the fridge at night is a nightmare. Can I do anything? Would a carpet fix it?