They are gypsum boards made of a mixture of gypsum, silicon and fiberglass and coated with a layer of treated cardboard, which is the result of a German technology, which appeared to be an alternative to false ceilings and walls.

Gypsum boards are made in a standard size (120 cm x 240 cm) or
(120 cm x 300 cm), and there are three types:

Ordinary gypsum board: It is covered with a layer of cardboard ready to be painted directly. It is used for all internal works and walls, except for bathrooms, kitchens and areas with high humidity.

– Fire-resistant gypsum board: It is covered with a layer of cardboard like regular gypsum board.. with different side adhesives and comes in red, used in the installation of walls.. It can be used on ceilings.

– Gypsum board that is resistant to fire and moisture together: It is considered one of the best types, as it is covered with a layer of cardboard and gypsum mold that contains a good percentage of silicone and fiberglass, and the cardboard layer is green on both sides and is also glued in green, and this type is used in bathrooms and kitchens And areas that suffer from great humidity, and it is preferable to use it in the whole house because of its specifications..
And all of these types are .. with a thickness of 9.5 mm or 12.5 mm.