Wall Rendering: What Is Tyrolean Plaster
Tyrolean describes the render and polymer cement used; it comes in a white powder that you may purchase commercially. Coating sprays, an open-hopper spraying machine, a compressor-powered render gun, or a Tyrolean flicker gun can all be used to apply it.
– Step 1: Clean the surface
– Step 2: Prepare the plaster
– Step 3: Test the application
– Step 4: Spray the plaster
– Step 5: Apply the finish
Applying a finishing coat on a façade is not necessarily reserved for professionals. With a bit of practice in handling and good support preparation, the tyrolean can be used to achieve a beautiful wall rendering.
The tyrolean is a small, light, manual machine of straightforward design. Flexible metal combs, activated by a crank, are loaded with plaster, then projected by the mouth when they hit the stop. A small lever (index finger) adjusts the amount of material sprayed with each turn.
Follow these instructions for proper tyrolean plastering.
Caution: A tyrolean plaster is a decorative plaster that does not exceed 3 mm in thickness. For this reason, it cannot protect against the weather or fill in any irregularities. Consequently, it is necessary to use a suitable coating (ready-made) and start with a very smooth and neat support.
1. Clean the support
– If your support does not have a smooth and regular surface, proceed with a wall patching, which will depend on the nature of the wall and its exposure.
– If your surface is dirty or has moss, brush it or even spray a bleach mixture. Then rinse thoroughly.
2. Prepare the coating
– Follow the manufacturer’s instructions and dosages carefully.
– Use a trough and a trowel (a concrete mixer is preferable for large volumes, this equipment is usually available for rent).
– Pour the recommended amount of water into the trough.
– Incorporate the coating into the water by sprinkling it with the trowel.
– Let it settle, then mix to make the mixture homogeneous.
– The plaster should have a liquid consistency. It should simply coat the trowel but not cling to it to check this.
3. Conduct a test application
– Load the zip line with a container (bottom of a plastic bottle), but do not fill it.
– Release the index finger and crank it a few times so that the coating spreads and the combs load.
– Test on a board or cardboard.
– Replace the index finger and adjust the setting until the desired grain size is obtained.
4. Spray the coating
Follow these guidelines to ensure an even, uniform coat:
– Move the machine as evenly as possible, at a distance of about 50 cm from the wall.
– Turn the crank at a steady speed (about 1 revolution/second), and find a quiet rhythm.
– Determine a rough area per load; this will help you in your progress.
– Loading the zip line comes back very quickly; it is advisable to have one person preparing and loading the plaster and another operating the device.
Spray the 1st coat
– Spray the first coat with the zipline facing the wall.
– After this pass, you will have a light speckle.
Apply the 2nd coat
Make a second pass:
– Orient the zipline at a 45° angle to the wall.
– Move horizontally to the right and then to the left: the projected droplets will cling to the tips, giving them more volume.
– At the end of the operation, wash the device with water.
5. Finish the job
Raw, tyrolean plaster has a grainy appearance. If you want a crushed aspect, more rustic and less aggressive to the touch, you can float it.
– To do this, smooth the plaster with a plastic or stainless steel float.
– Try always to keep the same movement.
– Proceed from the bottom to the top.
Materials needed to plaster with a tyrolean.
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