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Clay panel (also known as clay board, clay wallboard, clay building board, clay building panel) is a panel made of clay with some additives. The clay is mixed with sand, water, and fiber, typically wood fiber, and sometimes other additives like starch.[1] Most often this means employing the use of high-cellulose waste fibres. To improve the breaking resistance clay boards are often embedded in a hessian skin on the backside or similar embeddings.

Clay board is an alternative to gypsum plasterboard. It is suitable for drywall applications for interior walls and ceilings. It can be applied to either timber or metal studwork. Usually the application of clay boards is completed with clay finishing plaster.[2]


Constructional propertiesEdit

The boards have fire retardant properties and medium levels of acoustic insulation. Due to the clay component they have the ability to absorb large amounts of humidity through the plaster and helping to protect vulnerable buildings from excess moisture generated by modern living.[3]


The cutting of clay boards can be done with a cutter knife, jigsaw or circular saw. The clay board is mounted in vertical or horizontal form. It is fastened with screws with plate head or holding plate, alternatively also with wide back clamps.

A clay plaster skim can be directly applied to the boards following joint filling and reinforcement.[3]


  • Interior wall and ceiling board
  • Area separation wall board
  • Backer board and underlayment
  • Substrates for coatings and insulated systems

See alsoEdit