I am looking to refinish or replace an existing wood floor. The previous owner says the floor is solid hardwood. A contractor came to look and said he thinks it is solid, too. However, we had a dishwasher leak, and where there was water, a "laminate" looking layer of the floor has curled up and away from the rest of one plank. I've checked the air registers and I can't see an edge of a plank anywhere on the floor. Is is possible for a solid wood floor to have a thin layer on top? Or is this engineered?
Looks like a composite or engineered floor to me. That top layer will be 3mm or so thick and can be sanded once or twice if you don't go crazy with the sander.
Unfortunately most of these engineered floors do not fare well with moisture. Leave an offcut outside for a day or two and you'll see what I mean.
Back in the olden days, hardwood furniture would sometimes use different hardwood veneers to embellish what would otherwise look "too plain" and unattractive.
But hardwood floors are typically designed to sustain abuse. Your floor could very well be some sort of engineered laminate. This could be a thin hardwood layer on top of softwood, plywood or even MDF (which hopefully it isn't in the case... especially for a kitchen floor).