I am installing an engineered wood floor (bamboo). My LR/DR is 27' long. The installer said I ned to put in a T-joint transition between the LR and DR, at the 18' mark, to avoid buckling. I am concerned about a bump in the middle of the floor, and my wife says no way. Do I need to do this? I am installing the floor parallel to the long side of the room.
In my own personal experience of this, the floor is capable of enormous movement, even if you undercut at the skirtings. Avoid long, expanses without expansion joints if possible. My floor used to rise, like a small hill, then open into canyons, dependent on the change in the weather and humidity. Remember too, being on edge, it's strong enough to push a wall down!