Hello. We decided to install engineered hardwood in our home. I am no pro but am handy and have done lots of DIY including finishing my basement on my own, which included the laminate floor, so I thought, how difficult can it be to install engineered hardwood? Well, we haven't even decided on color yet and here I am in need of expert advice. Half of our first floor has real hardwood, half has carpet. My first problem? The hardwood is probably one inch thick. The engineered is a lot less. Unless I make up for the lost thickness, the door jambs/trim will not look good without major work (If anyone knows of some way to make this easy, please feel free to suggest....). So here's where my question comes. Is adding another plywood/particle board layer to the whole first floor something common? Any tips on how to attach to the first layer (Overlap, glued, screwed). Thanks in advance. I am sure there will be more questions. Rick.