Whether you have carpet or not just put shallow pans of soapy water on the floor and the fleas will jump into them and drown. I know it sounds crazy but I did it and it worked. Change the water everyday until you don't see fleas in it any more. I never knew the source of the fleas that I had as we don't own any pets but we do have a lot of sand around our place so maybe they were sand fleas. I keep a clean house, vacuum regularly etc. So I was really surprised when I found that there were fleas in my house. That was about 3 years ago and I haven't had the problem since. Hope it works for you.
2/3 applications of flea bombs. Eggs can hatch 3/4 days after application. Bomb once, spray cracks and crevices. Bomb again a few days later. Move furniture away from walls, cushions off the furniture, open closet doors etc. Before each bombing.