The house we have just bought has a number of ceilings with polystene tiles and a builder has just said to us that one of the easiest ways of dealing with them (as removal is very messy) is to simply put plaster boards on top and fix by long screws into the joists, then skim. The ceilings are quite high so no problem in slightly lowering them. Has anyone had any experience of this?
It is a messy job but as Rosebury says get scraper to them and remove them. They are no longer allowed, as they give of toxic fumes in a fire situation, boarding over them would reduce the time that fire could effect them but better shut altogether. Heat gun does work on glue but I always found that wallpaper steamer did a job better and caused less damage to plaster on ceiling.
Your ceiling may be fine underneath, but the glue does oftem leave patches that show up after painted so may need to plaster or overboard and plaster/joint finish!
Your builder is suggesting quick, less messy fix but I recommend you remove them.
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