The tile adhesive i am trying to get of my floor is black and gets sticky when heated. Any advise....?

Well when you said black and sticky I instantly went back to childhood and thought of that ugly old tile (VCT) in my parents house..LOL Yes it's a messy job I'll agree. It would be easier to just cover it up and move on but your talking some added expense, more labor and time consuming. I'm going to stick with the chemical adhesive removers. I wish I knew if it was on concrete or wood but you just brush a semi-paste chemical on and let it sit. Adhesive gets very slick and slimy, sc it up with putty / broad knife (6-12inch wide) wash with hot water a few times and throw your brush away!!! I suggest wearing knee pads and covering the toes of an old pair of shoes with tape....oh yeah and gloves. I just don't think the added height of a new substrate will benefit you if you don't have too. Hope all these suggestions help!!! Good Luck!