plaster board types

[kentish plasterer]

iv been told that your ment too to tape and joint fire board and moisture resistant board????
then seal ready for tiling ???

iv plasterd over these boards in the past just trying to get a heads up

[mik mpd]

the job im on at the minute has a mixture of boards in tiled areas, orange aqua panel in shower areas and green moisture in other areas. weve had to tape them all two coats and leave flat but thats it, no need for sealer. Never had to seal before tiling on any other job either. The odd previous job weve done theyve used square edge boards and just tiled without any taping i guess its just down to the individual job spec