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.

Tyrolean plastering


    – 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.

Tyrolean traverse


Tyrolean plaster



Concrete mixer

Pressure sprayer