How do I remove styrofoam panels that cover most of the ceilings in my home?

Those blobs of adhesive come off very easily if you keep soaking them with hot water .

As suggested,just a normal wallpaper scraper will easily remove polystyrene tiles but you may need a stanley blade scraper to remove any adhesive. More often than not,these tiles were stuck on old original lath & plaster ceilings. If you have any re-plastering done,make sure they are either over-boarded first or if they are in bad shape,take them down & then board.............do not let anyone plaster/re-skim directly onto lath & plaster ceilings. If by any chance they are plasterboard ceilings,as long as they are good & sound you can re-skim onto these. Carl.

The tiles will come off easy enough with a standard wallpaper scraper but the glue is a different matter this is usually solid and the best solution is usually to replaster...... on a couple of occasions I have managed to remove the glue with a steamer but using a steamer upside down on a ceiling comes with its own problems So I guess what im saying is scrape tiles off and replaster I hope this helps!!

oh those things are hideous! just finished a ceiling with them on. I used my trowel (plasterers) to get underneath them and scrape off, using the toe of the trowel. I suppose it depends on what adhesive was used to stick them up, as it will all vary in strength. I had to go over the whole ceiling again with a scraper to remove the adhesive and little bits before skimming. Basically use the sharpest flattest piece of metal available, be it a scraper or trowel.