Filling plasterboards - Step by step instructions for do-it-yourselfers

Gypsum plasterboards are an elementary building material in drywall construction. This will allow you to hang your blanket, renovate and repair the walls, or even build completely new walls. The advantage of the plasterboard is that it is easy for hobby craftsmen to do. However, in order for your wall to be smooth at the end, it is necessary to fill the plasterboard. Below, in addition to a detailed step-by-step guide, we have also created a tool and material list for you to make filling the plates a breeze. We also have four tips for you that will be of great help in this work.

Required Accessories

Before you get started, make sure you have all the materials and tools you need in the house , The following lists show you which accessories you need.

    • Putties
    • leveling compound
    • Abrasive paper
    • Plasterboard
    • Finish size
    • Edge protection profile
    • Depth base
    • Crack bridge
    • Silicone or Acryl
    • Bucket
    • Trowel
    • Cutter knife
    • Tamping gun
    • Trowel
    • Broom

You can find most of the accessories in the hardware store, but of course you can also buy it online.

Leveling the plasterboard in seven steps

The following instructions show you in seven steps how to fill the plasterboard to obtain a flat, smooth wall or ceiling.

Step 1: Remove the dust from the plasterboard

Next You must ensure that the plasterboard is clean and dust-free. Therefore, use a clean broom to remove dust from the finished plasterboard or plasterboard surface.

Take extra care to dust the sheets where they should later be filled.

Make sure that all screws have been sunk correctly to facilitate later filling. Each gypsum board is provided with a chamfer at the factory. In this way, it is ensured that after mounting a joint is formed in a sufficient width, in which the filler finds a good grip. In places where several sliced ​​plates meet, you must cut a chamfer with the cutter knife. The joints are pretreated after dedusting with deep ground. In addition, you should bandage all joints with a crack bridge.

Step 2: Mix the putty

As soon as all preparatory work has been completed, you can mix the putty. Take either a clean bucket or a similar well-suited container. Slowly pour the powder into cold water. Be sure to follow the manufacturer's instructions given on the product packaging when mixing with the putty.

It is better to apply a slightly thicker coating and dilute it later than vice versa. If you then add powder to a too thin mass, lumps often form.

If only minor repairs are required, often no putty is needed for mixing. Instead, you can also opt for the ready-to-use solution from the tube.

Step 3: Pre-filling the plasterboard

Using a smoothing trowel, you can apply the putty across the joint and press firmly. The superfluous mass is then drawn off with the broad side in the longitudinal direction of the joint and pressed into the following joint.

You must scrape the smoothing trowel in between and clean it again and again. For this a small spatula is very good.

First coat the horizontal joints with the putty and then the vertical ones. Vertical joints can be filled from bottom to top. In this way you ensure that less putty drops down. Before the next step the putty must dry well.

Step 4: Finishing the plasterboard

Experienced craftsmen can not fill gypsum plasterboard in a single step. When pre-filling, make sure that all joints are well filled. However, you do not have to pay much attention to the transitions, as you will be able to take care of the finishing touches. Unevenness first remove with a spatula and sand paper. Brush the sanding dust with the broom. Now a finish mass is applied over a large area. This creates a flat surface between the wall and the joints.

Step 5: Fill the screw holes

Fill in the screw holes at the points where the plasterboard is connected to the shuttering. For this it is necessary to completely sink the heads of the screws in the plate.

Step 6: Fill the inside and outside corners of the plasterboard

If two plasterboard panels meet in a corner of the room, you must allow about five millimeters of air between the panels. This joint is then filled as described above. If there are transitions between plasterboards and other materials, a permanently elastic joint should be pulled. For it is paintable silicone or acrylic. For protruding edges, you can place an edge protection profile on the outside.

Step 7: Regrind Plasterboard

After filling you should wait at least four hours before the last step begins. All you have to do now is sand the gypsum board to remove any bumps and finish the new drywall. Afterwards, you can plaster, tile or paper them to your personal taste.

Four tips for filling plasterboard

Finally, we have put together four tips for filling plasterboard for you to make your work even better.

Tip 1

Everywhere it is recommended to level the horizontal joints first and then the vertical ones. In fact, this is recommended for the following reasons:

  • The horizontal joints are usually staggered so that they do not form straight, completely horizontal lines
  • . The vertical joints, on the other hand, are in line because the panels were bolted to the casing
  • If you fill in the continuous, vertical joint and then the horizontal joints first, it would cause dents to form in the freshly leveled vertical joints.

However, as long as you fill in the staggered horizontal joints and then the continuous vertical joints , even smooth the ends of the horizontal joints that hit the vertical joint in a single step.

Tip 2

It goes without saying that all screws must be countersunk to fill the screw holes with care. However, you can do without this step if you want to plaster the plastered plasterboard wall later. That would be just unnecessary work, which you can save well and like.

Tip 3

For houses that are still in motion - such as in old half-timbered buildings - you should also use joint tape when filling. Otherwise, cracks could later develop on the joints, which should be avoided. First fill the joint depth with the putty, then lightly press the joint tape and finally add a second thin putty layer over the joint tape to hide it slightly.

Tip 4

As an alternative to the trowel, you can also use a wide spatula. When buying, you should make sure that it is neither too flexible nor too stiff. If it flexes too easily or requires too much effort to bend, the spatula will not work as a smoothing trowel replacement.


Drywall panels can be used in a variety of ways, for example to hang ceilings, repair walls or move in new walls. The filling of gypsum plasterboard is an important step, because only in this way a flat and smooth surface is created. To fill plasterboards several passes are required.

Artikelbild: © holbox /