How to plaster a wall?

Why do you need interior plaster?

Interior plaster is a covering made of mortar and various binders. It creates a smooth surface that can be used to attach wallpaper, for example. It also protects the interior walls and improves moisture regulation in the interior. The choice of the type of plaster depends on the nature of the wall.

An essential part of the work when plastering the interior walls is good preparation. The barrier to be plastered must be clean, and the floor must be covered. After particular corner and plaster, profiles have been attached in the next step, and a primer has been applied to the surface. Work begins with the dressing in several steps. Finally, it still says Clean tools. 

When plastering, it is essential to work quickly as the plaster dries quickly. Therefore, read the instructions thoroughly before you start preparing the substrate. It, therefore, makes sense always to have all the necessary materials ready to hand. Essential tools such as spatulas, trowels, and smoothing trowels should ideally be available in duplicate.

Six steps to plaster the wall

  • Preparation for plastering
  • Clean the surface
  • Mask off windows and window sills
  • Apply deep primer

First, you clean the surface to be plastered thoroughly. Use a hammer and chisel to knock off any paint streaks or protruding plaster residues and carefully brush off the entire surface. Adhesive plaster substrate must be free of loose parts and dust. Otherwise, the whole plaster can crumble off again.

Then carefully tape up windows, window sills, and the like. Measure out the window, cut the double-sided adhesive plaster strips to the right length and carefully glue them around the window. You can attach the cover film for the window to the front of the plastering strips. Later you will cut off the foil and the part of the plastering strips that you did not plaster with. Now you apply a generous amount of deep primer to the wall with a pressure sprayer. With this, you can turn the strongly absorbent sand-lime brick wall into a weakly porous subsurface.

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2. Set profiles

  • Treat imperfections with repair mortar
  • Attach plaster rail
  • Remove protrusions above the rails

To make your walls as even and even as possible, treat imperfections such as holes and cracks with the repair or plaster mortar. You can also use the cannon to attach the plaster rails or plaster profiles. They will help you later to maintain the desired thickness of your plaster layer.

Now apply a little mortar to the wall in places and attach plaster rails vertically to the wall at a distance of about 50 cm. After the mortar has dried, remove any excess over the fences with a spatula or, if necessary, carefully with a hammer. So that the surface is really smooth and even, finally go over the wall again with the screed board and check with the spirit level whether everything is nice and clean.

3. Mix the plaster

  • Apply plaster according to the manufacturer’s instructions

That’s how it is done

Mix the concealed installation according to the manufacturer’s instructions in a large bucket with a drill with a whisk attachment or a professional mortar mixer. Mix the base coat until there are no more lumps to be seen. A grape pencil is not particularly suitable for working with plaster rails. It is slightly angled and can therefore hold a lot of material. With the grape brush, plaster can be applied evenly and over the entire area within plaster rails.

4. Apply plaster

  • Apply the plaster with a plaster trowel
  • Smooth the wall with a grape brush

You apply the mixed plaster to the wall with a trowel and smooth it out with a board or a grape brush. Smoothing is only ever done between two plaster rails and always from bottom to top. You also work wet on wet: Always work on a wall without interruption and only ever mix as much plaster as you can use.

If you are already a little experienced in plastering, you can use the spray grouting technique: With a loose movement of the wrist, you throw the plaster with the trowel from bottom to top on the wall and then smooth the whole thing. It is best to practice this technique first with smaller amounts or in smaller areas.

If there is a ready-made socket in your wall, cover the socket with a plaster lid before plastering. But make sure that the little red tab is still sticking out. After the drying phase, pull the tab. Your socket will appear under the lid.

5. Smooth the plaster

  • Adhere to the tightening time
  • Smooth the plaster with a screed board or masonry sponge

The tightening time follows. This time is the first drying phase, which is around 1.5 hours, depending on the type of plaster. Then you smooth the application with the peeling board or the grape brush. If the material is already too dry, you can use a masonry sponge: You can use it to run in circular movements over the wall piece by piece, smoothing the plaster.

6. Plaster window frames

  • Place corner profiles
  • Use plastering strip for a clean finish
  • Apply and peel off the plaster
  • Use a cleaning sponge for transitions

You can also easily plaster a built-in window. With the help of mortar, you set corner protection profiles, ensuring that the plaster adheres well to the corners. You also need your plastering strip, which enables a clean finish. Apply the plaster piece by piece with the trowel and carefully plaster in the profiles and molding. Then straighten the application immediately and smooth it again after the setting time. Also, go over the transitions with the cleaning sponge. Now remove the film in front of the window and cut off the rest of the plastering strip.

Also read: how to make an envelope.


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