I installed engineered hardwood floors in my living room in the instructions it said to put polyurethane on the floor when finished so that's what I did but now some spots on the floor are spotty and some are smooth and shiny what should I do. How can I take the polyurethane off the floor.

First time w/ hardwoods. Purchased Traffic Master engineered hardwoods for the whole house. Where do we start? How do we know one room will line up to the next, and into the hallway? Any trick we need to know? Thanks!

In August I had engineered floors installed over cement (radient heat). The floor was a floating floor with a cushion installed between the cement and the flooring. Recently I've noticed that the planks have separated in 2 or 3 locations slightly. It appears that they have separated the toung and...