Steps:1. Use a putty knife, hammer, and painter's tool to carefully pry trim pieces off and free up the edges of the floor (figure A). Number and mark the trim pieces and baseboard pieces as you remove them so you can re-install in their original positions. Pull all nails from the trim pieces.
2. Now use the heat gun to loosen the glue and free the vinyl flooring. Start at the edge and carefully pry up the vinyl while heating it with the gun (figure B). Use a painter's tool and the scraper on the tip of the heat gun. Wear safety glasses, heavy gloves and kneepads while peeling up the floor. Also, heating the floor and glue will release fumes so make sure the area where you're working has adequate ventilation.
Note: Vinyl flooring made in the late 1970s or earlier may contain asbestos. If you think your flooring may have asbestos, check with a professional before making any changes.