I'm trying to manage my expectations here. The plan is to install an engineered floor on a concrete slab. It may be glued and floated or we may use click lock floating. Unfortunately, we don't have consistent climate control in that room. In the winter, if the wood stove is going, relative humidity can drop to 20%. If it's not on, the temp can drop to 45ish. In the summer, RH could reach 80%+, with temps even higher. This is our reality. Given this, how should I expect a good quality engineered floor to perform? Should I prepare myself for some winter gapping? Will floating prevent buckling in the summer? Thanks.

Hi experts: I've installed hardwood floor in my living room and kitchen, it was Bruce oak gunstock, 2 and 1/4" strip bought from HD. It looks great! So I plan to replace the old carpet on my stairway with hardwood. The stairway is enclosed by walls on both side, so according to some article I read, it should be easy for DIY. I visited some model home and noticed that the wood floor on the tread and riser are all single pieces. I wonder where i can buy those wide pieces? it has to match my floor (oak gunstock). I am not sure if i can use the same strip plus stairnose for stairway? or it's not the pro's solution? The resource for installing wood floor on stairway is fairly limited. A few books from HD is not detail enough, anybody know where to get some info regarding this issue? Thanks! ls