Magnesium oxide board (MgO board) is a factory-made, non-insulating sheathing board product. It can be used for a number of applications including wall and ceiling linings, fascias, soffits, tile backing and underlayments. It is made primarily of magnesium oxide, and is commonly called simply (MgO) (pronounced emm-gee-oh) due to its chemical composition of magnesium and oxygen. MgO board is a type of sheathing board-sort of like gypsum board or cement fibre board – however with several improved characteristics such as fire resistance, weather ability, strength, resistance to mould and mildew, flexibility, adherence advantages and so on.
MgO board is available for building construction and comes in various thicknesses and sheet sizes. It also comes in various grades, such as smooth finishes, rough textures, and utility grades. It is white, beige or light gray in colour, and has a «hard» sound when rapped with your knuckles-somewhat like cement fibre board.
Like any sheathing board, MgO board can absorb water but its performance is unaffected. Thus it can be used indoors and outdoors, and in damp locations, such as showers. Like Portland cement based sidings, if MgO is used outdoors in an exposed location, it needs sealing in much the same way as cement. MgO is used structurally-as in bracing for walls-and also semi-structurally, such as an underlayment for flooring. Magnesium oxide board was developed many years ago as a cheap alternative to cement fibre board. It turned out as a coincidence to be a product with many superior characteristics. MgO Board was extensively used in construction during the 2008 World Olympics buildings in Beijing…and was used in the world famous Taipei 101 building which up until recently was the world’s tallest building.
Suitable for Ceilings, partitioning and external cladding.
Available in the following thicknesses 4mm, 6mm, 9mm and 12mm
Board size 1200 x 2400, 1200 x 2700 and 1200 x 3000
MgO board consists of 5 layer:
|1 – Facial surface layer.
|2 – Fibreglass net reinforcing layer, which makes the board durable and stable
|3 – Filler layer (includes magnesium cementing agent, perlite and wood chips)
|4 – Second fibreglass net reinforcing layer.
|5 – Filler layer of the inner side.