Clay plaster

Clay plaster for historical and contemporary interiors. A more energy efficient building and a healthy indoor climate.

Saviukumaja’s clay plasters are 100% natural and produced using solar energy. The clay plasters have been tested based on the German standard for earth plasters (DIN 18947:2013-08). According to the standard, the plasters belong to the higher strength class S II.

Clay plaster is suitable for all surfaces, both in a historical and contemporary interior. Clay plaster can also be used in damp rooms, except on surfaces where it is in direct contact with water.

When clay plaster is used in the construction of a house, it creates a perfect symbiosis between the house, nature and people. Clay plaster does not pollute the environment. Clay is a fire-resistant, heat-accumulating, moisture-absorbing building material.


Saviukumaja´s clay plaster base coat is a dry mixture, which comprises top-quality clay, 0-4 mm sand that has been carefully selected using a grading curve, fibre of cattail, hemp shiv and fibre.


Suitable for plastering different surfaces in indoor conditions. Used for plastering base surfaces in the ground coat or finishing coat when required. Suitable for plastering different surfaces (wood, stone, bricks, clay, lime and other mineral plasters, reed board, straw walls, concrete blocks, Aeroc, Fibo, etc.).

Colour range

Dark red. Red, brown, blue or grey available via special order.


Clay plaster adjusts the air humidity in rooms, accumulates heat, inhibits the formation of mould, neutralises electromagnetic pollution, suppresses echoes, and is suitable for people suffering from allergies. Saviukumaja’s clay plaster has great adhesiveness and surface resistance. It is 100% natural and reusable. It is possible to shape round edges and different forms.

Base surface

The base surface must be stable, weight-bearing, dry, absorbent, adhesive, and definitely clean from dust, paints, and lubricants (oil, grease, etc.). We recommend using a Saviukumaja´s thin reed mat when plastering wooden surfaces (logs, boarding, chipboards and other wood-based boards with a smooth surface); use a Saviukumaja´s reed board, natural fibreboard, corkboard or other natural insulation material for insulation. We recommend using a fully covering jute fabric from Saviukumaja’s selection to reinforce plaster in the second layer (with an overlay of 7–10 cm).


We recommend using Saviukumaja's Finish clay plaster and Fine finish clay plasters for finishing. If you wish to display the base coat, we recommend applying Saviukumaja’s finish primer on the surface.

Clay Plaster, base coat (0-4 mm)

25kg 1.50 m² 1.00 m² hemp shiv and fibre, cattail Dark red  
500kg 30.00 m² 20.00 m² hemp shiv and fibre, cattail Dark red  
1000kg 60.00 m² 40.00 m² hemp shiv and fibre, cattail Dark red