My son is removing the old linoleum in the basement of his 100 yr. old house in Brooklyn. He seems to be stuck on a piece in the middle of the floor that just won't come up. It is laid over concrete floor. Anyone have any ideas or a product that would help? He has been scraping but to no avail. Thanks

Sometimes old adhesives can be persuaded to be softened with a little heat, like from an electric heat gun or soaking around the edges with even something as mildly acidic as straight vinegar?

You should be careful some really old flooring has asbestos in it.

we used the steam-cleaner it soften the adheisive really quick...