How to repair partition walls? 2026

How to repair partition walls? The dividing walls of houses or apartments are generally made with a metal or wooden structure covered with cardboard gypsum panels.

How to repair partition walls?

This material, being light, breaks if pressure is exerted on it; or due to movements of the structure, joints between plates may appear. In this project, you will see that these problems do have a solution and it is much easier than you think.

Materials to use:

• Joint paste
• Wood sandpaper no. 180
• Brushed Pine 1×2″ 3.2mt
• Micro-perforated tape
• Metallic tape
• Plasterboard screws
• Plasterboard

Damaged corners

Because plaster is a fragile material, the corners of the partitions are exposed to damage from impacts generated, for example, when moving objects from one room to another. Metal corners are recommended for repair.

1 Sand the surface

• Use sandpaper to eliminate imperfections and roughen the areas surrounding the damage.

2 Size the tape

• Measure and cut the tape with tin snips, the tips should be in the shape of a “V”.

3 Paste the tape

• Apply the first coat of the paste that works as an adhesive bridge.
• Immediately stick the tape with the metal facing inwards and press to remove any air that may remain between it and the paste.

4 Termination

• Cover the tape with a layer of paste.
• Once dry, sand to remove imperfections.

Fissures in joints

This type of crack is generated in the joints of plates due to the contraction of the material due to changes in temperature or tremors. For its repair, it is recommended to use a microperforated tape, special for this job.

1 Sand the surface

•  To begin the repair, it is necessary to sand to create a porous surface that facilitates adhesion.

2 apply the paste

• Spread a first layer of paste with a spatula, which will act as an adhesive bridge between the wall and the tape.

3 stick the tape

• Immediately stick the tape onto the pasta. The tape has a marked center, which works as a guide when installing it.
• Squash the tape with a spatula so that any air that may have been trapped escapes through the microperforations in the material.

4 Termination

• Finally, cover the tape with another layer of paste
• Once dry, sand to remove imperfections and even out.

Large puncture or crack

Whether because the weight of a shelf ended up collapsing the board, producing a hole or due to a blow, this type of damage can also be repaired, all you need is a piece of plasterboard of the same thickness as the wall.

1 cuts the plasterboard

• Cut a piece of plasterboard that is larger than the hole in the wall, this can be done with a cardboard knife or with a special saw for panels of this type.

• Transfer the measurement of the cut to the wall, to do so, present the piece over the hole and mark the contour on the wall.
• Cut the newly marked perimeter on the wall.

2 fix slats

• Inside the cut you made in the wall, fix slats that you will use to later be able toSew the new piece of plasterboard together.
• These pieces of lath have to be 2.5 cm longer than the hole we just made and fix them to the wall with drywall screws.

3 screw the patch

• Lay the patch in place and secure it to the battens with the same drywall screws.

4 Termination

• To cover the screws and the patched area, you must first put paste and then the microperforated tape.
• So that the repair is well done, and the joints are hidden, apply the paste again.
• Finally sand the surface to eliminate imperfections.

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