Clay plaster has many advantages as a material: It regulates the humidity in the room, absorbs pollutants and contains no artificial additives. If you spray clay plaster, it saves a lot of time and is easier to apply. We show you all the steps for spraying clay plaster with the WAGNER screw pump PlastCoat 1030.
You can buy clay plaster in stores as a dry mix or moist clay. You only need to mix both mixtures with water. For mixing clay plaster, temperatures of at least 5 °C should prevail in the room.
Usually, two layers of clay plaster are applied: the clay base plaster (also called 'loam base plaster') and the clay finishing plaster (also called 'loam finishing plaster'). The layer of clay base plaster is thicker (approximately between 35 and 40 mm).
The layer of clay plaster above it serves to round off the appearance and has a smaller thickness of approx. 4 mm. The grain size can be both fine and coarser. The application of clay plaster is the last step before a possible coat of clay paint.
Add clay powder to water to make a slurry, add sand, then the cut straw. Add water as needed. It is best to prepare the mixture the evening before applying the clay so that it has time to soak This makes the straw more pliable and the clay can develop its full adhesive power. Stir the clay vigorously again before applying. You should sweep the surface before applying the clay plaster - especially if the walls are dusty or crumbly. You can also paint the wall with clay slurry.
Add clay powder to water to make a slurry, add sand, then the cut straw. Add water as needed. It is best to prepare the mixture the evening before applying the clay so that it has time to soak This makes the straw more pliable and the clay can develop its full adhesive power. Stir the clay vigorously again before applying. You should sweep the surface before applying the clay plaster - especially if the walls are dusty or crumbly. You can also paint the wall with clay slurry.
The use of moist clay plaster is the more environmentally friendly option, as very little energy is used in its production. moist clay plaster is made from pit clay without mechanical drying. You can also buy ready-mixed clay plasters. You should use the clay plaster no later than 3 months after delivery. Mixing is also done with water, either by hand or with a plastering machine. Machines with an open plastering system such as a mortar pump or a compulsory mixer are suitable for this purpose.
The use of moist clay plaster is the more environmentally friendly option, as very little energy is used in its production. moist clay plaster is made from pit clay without mechanical drying. You can also buy ready-mixed clay plasters. You should use the clay plaster no later than 3 months after delivery. Mixing is also done with water, either by hand or with a plastering machine. Machines with an open plastering system such as a mortar pump or a compulsory mixer are suitable for this purpose.
Here you can see how to spray clay plaster with the Wagner PlastCoat 1030. With the practical screw pump you save power and time. First, the clay base coat plaster is applied. Then we show you how to apply the clay finishing plaster or clay topcoat.
You can find all details on commissioning in the Academy video on the PC 1030. Make sure to use the green rotor-stator combination for clay plastering and a nozzle size of 12-15mm. After assembling the screw pump, set the flow rate between 7 and 8.
Mix paste and pre-lubricate the machine with paste. To do this, fill the paste into the material hopper. Then remove the paste from the machine. Now fill the clay base plaster mixture into the PlastCoat 1030 material hopper.
Spray the clay base coat primer in regular horizontal lines. Make sure the material is about 4 cm thick.
After building up the plaster, smooth the applied clay base plaster with a smoothing trowel or trowel. Now let the plaster dry. If required, use a fibre grid to prevent cracks.
After building up the plaster, smooth the applied clay base coat plaster with a smoothing trowel or trowel. Now let the plaster dry. If necessary, use a fibre grid to prevent cracks.
After it has dried for a while, work the clay base plaster with a notched trowel to prepare the base plaster for the application of the finishing plaster.
After you have cleaned the machine, prepare the machine for pouring in the clay plaster mixture. Mix the clay plaster with water. Now fill the mixture into the hopper of the PlastCoat 1030. Make sure the nozzle size is approx. 8 mm.
Dampen the wall with water to prepare it for spraying the clay plaster.
Then start spraying. Apply the clay finish plaster evenly over the dried base plaster.
Then carefully smooth the clay plaster as well. then check the layer thickness of approx. 4 mm. Now let the plaster dry and sand it if necessary.
For healthy living, clay base plaster and clay refinish plaster form the perfect basis for the final wall design. When choosing wall paint, care should be taken to use clay paint with natural pigments to preserve the breathable properties of the walls and create a healthy indoor climate.
The powerful screw pump PlastCoat 1030 was used for this project. It is ideal for spraying clay plaster, as it can also handle highly viscous materials.
The screw pump is suitable for a wide range of applications associated with the application of plaster primer, decorative plaster, fine plaster, clay plaster.
Despite the highly viscous consistency, you can easily apply clay finishing plaster and base coat with the powerful unit. It is also suitable for coating, filling and grouting and pouring many other high viscosity and filled materials.
PlastCoat 1030Depending on the material, a screw pump requires different combinations of rotor and stator to ensure optimum delivery. For clay plastering, please select the green rotor-stator combination with item no. 2385520 (rotor) and 2385532 (stator).
In addition, please use a nozzle with a bore diameter of about 12 to 15 mm for clay base coat plaster and a nozzle with a bore diameter of about 8 mm for clay plaster.
Texture nozzlesAfter the clay plaster spraying follows the application of the clay paint. An airless paint sprayer from Wagner such as SuperFinish 33 Pro is ideal for this. Spraying clay paint saves time and energy - applying the paint is much easier than painting with a brush or roller. Please note the information on adding water to the clay paint container so that the paint has the right consistency for spraying.
SuperFinish 33 Pro