[l2ridehd]

Try Acetone. Rip up the old carpet, then apply acetone to the remaining adhesive, let it set for a few minutes and wipe it off. Get it in the paint dept at Lowes or Home Depot. Use rubber gloves. Get the worst of it off, use a long handled scraper to make sure surface is smooth. Then vacuum up and loose pieces and then tile, paint, carpet or what ever you want to do to replace current carpet. To do a 12 X 16 lanai should only take a couple hours to prepare it for new surface doing it this way.