Instructions for filling walls

Instructions for filling walls: putty

Tool and material requirements
  • Spatula powder and water or
  • Finish filler
  • cover
  • abrasive paper
  • possibly fabric tape
  • Painter's spatula or smoothing trowel
  • Plaster cup or mortar bucket
  • vacuum cleaner
  • Hand broom / damp cloth

Whether large area or small repair work, filling walls is one of the most common works of a handyman. Our guide will show you how to repair walls yourself and what materials are needed.

Old Boreholes, stress cracks and wall gaps, can be self-filled in no time. A little more effort is the large-scale filling, for example the Joints between plaster walls, With the right tool, but also succeeds this project easily.

The costs of filling walls are, of course, dependent on the size of the surface to be filled and the price of the materials used.

Step 1: Use which filler

Select the filler according to the surface to be filled. Be sure to observe the information on the product on which materials the filler adheres. Roughly be distinguished Interior and exterior spatula.

Instructions for filling walls: putty

Choose the appropriate filler.

The gypsum-based interior filler adheres to almost all materials and is therefore ideal for renovating interior walls and ceilings. Since gypsum is ph-neutral, the putty will not discolour if you then paint or paper it. However, it is not water repellent and shock resistant. Therefore, it is also recommended to use external filler for floors or wet areas inside the house. The cement-based exterior filler is less sensitive to moisture, moisture, impact and scratches.

Instructions for filling walls: filler

Important is a lump-free, smooth consistency.

For large areas, use material in powder form, for example Uniflott from Knauf, which you can mix with water before applying. For small repairsLike filling holes or small cracks, too Finish filler be processed from the tube. For deep holes, the use of deep filler.

Special fillers, such as silicone or acrylic, are used in areas that have to withstand large amounts of water, movement or temperature fluctuations. In addition to the filler you need a spatula for mixing and application. Here, too, depending on the application, different sizes are available. For small to medium areas is a Malerspachtel sufficient. For large areas recommends a broader Skim, Around Put to fill up is suitable Trowel or trowel.

Step 2: Preparation of the surface to be filled

Instructions for filling walls: filling

Suction wall remains from the opening.

Instructions for filling walls: filler

Wipe dust and dirt off the wall.

Protect the surrounding area with a painter's foil or laid paper from dirt and splashes. The wall must clean, dust-free and dry his. Remove loose paint and wallpaper from the wall and remove nails, screws and dowels with pliers.

Then free the gap to be filled or the hole from gypsum and loose wall residues. Increase the opening until it is surrounded by solid masonry. To do this, vacuum the opening with a vacuum cleaner and remove the loose edges. Then sweep the surface with a broom and wipe dust and dirt off a damp cloth.

If you want to fill a surface that is not absorbent and reacts repellent to liquids, such as a tiled mirror, a special one must be usedprimer be applied. You can use porous masonry and strong absorbent surfaces Tiefengrund Pre-treat. This prevents the putty from being withdrawn too quickly.

For more tips on preparing the walls for renovations, click here. Before proceeding, allow the damp or pre-treated substrate to dry.

Step 3: Mix the putty

Instructions for filling walls: filling

First fill the water into the plaster cup.

Instructions for filling walls: walls

Add the powder to the water.

For small areas, we recommend the use of ready-to-use putty. This does not have to be touched and you can start immediately.

For large-scale projectsFor example, when filling the joints of plasterboard walls or very deep holes, use the more fertile putty in powder form. Depending on the required amount, mix the mass in onePlaster cup or mortar bucket and fill in first the water on.

Follow the manufacturer's instructions to determine the water / powder ratio. The Slowly pour the spatula powder into the water let it go with the spatula stir constantly. The right consistency is achieved when water and putty have combined to form a tough, homogeneous mass. Processed immediately after mixing.

For larger projects, it is advisable to mix the putty in several steps, so that the product does not dry during work. Helpful for mixing large quantities is a Mörtelrührer, as an attachment for the drill.

Clean used tools and buckets immediately after use. The dry putty can be removed later only with difficulty.

Step 4: Apply putty

When applying the filling compound, make sure that the hole, the gap or the crack is filled in its entire depth to avoid air bubbles. If necessary, work in several steps.

Instructions for filling walls: instructions

Press the finished filler from the tube into the hole and pull it smooth with the spatula.
  • Fill small holes and cracks: Inject the finished filler directly from the tube into the opening. Press the mass into the hole with the putty knife and fill it completely. Then remove excess material with the spatula and smooth the surface.
  • Fill in deep holes: For strongly absorbent, porous masonry, as is often the case in an old building, it is recommended to pretreat with a substrate and fill with a deep filler. Fill the mass with the spatula in several layers and allow to dry after each coat, before re-application.

    Instructions for filling walls: filling

    Apply the putty with a spatula and smooth.
  • Fill joints: Apply the mass with a trowel or trowel. To do this, pull the trowel across the gap so that it is completely filled. For plastering plasterboard, you can also use reinforcing strips. The fabric serves to stabilize and avoids cracks and air bubbles. Find out more in our guide Plaster plasterboard from Rigips properly and grind.
  • Fill large surfaces: Use a surface spatula. Apply the mass in the first step without special technique. When the entire surface is covered, level the application with the surface trowel by pulling in a semicircle from bottom to top.

Step 4: Sand down the filled area

Instructions for filling walls: filling

Flatten the tiled wall after drying.

The putty must dry before further processing. Small, flat areas need about 30 to 60 minutes for this. Deep openings must harden for longer.

Even if the surface already appears dry, the mass inside may still be moist. The manufacturer's information on the packaging, give accurate information. Finally, repair any irregularities with sandpaper. A fine-grained paper is best suited for this. In large areas, a hand grinder or a grinder makes smoothing the smoothed wall easier.

With a new coat of paint the filled spot will not be noticeable later.

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Video Board: Drywall Repair: How to Fix a Hole in the Wall