Wood will expand and contract due to moisture levels in the air and the substrate they are being installed upon.  It is necessary to have the wood flooring within 3% variance of the substrate.  This is achieved by placing the wood flooring in the same area as the substrate.

Most engineered wood can be screened and/or refinished.  A quality engineered floor will last as long and perform as well as a solid wood floor.  As a rule of thumb, count on 1-3 times.

It is completely natural for hardwood flooring to yellow, grow darker or even lighter over time, depending on the wood species. Exposure to direct sunlight and some artificial lighting may accelerate this process. Periodically moving furniture and rugs will keep your floor well blended.