Gypsum board cutting with the right tool


With the right tools, almost all work can be done relatively well. This also applies to the cutting of plasterboard. It is very important to obtain straight cutting edges in order to process the plates properly later.

Cut plasterboard correctly for good results

Gypsum plasterboard must be cut in most cases before further processing and assembly. In principle, it works quite simply with a craft knife and a few, just a few steps:

  • First, you must mark the cutting line on the cardboard surface of the gypsum fiber board. Be very careful.
  • Now use a sharp knife (such as a craft knife) to cut the board surface on the board to the gypsum core. You get in this way a breaking point.
  • Now you can break the plate over a sharp and stable edge (for example, a stable work surface).
  • If the backside cardboard layer does not separate, you can also cut it with a sharp knife.
  • Now you have to attach a chamfer of about 45 degrees to the cutting edge. This is important in order to fill the butt joints of two adjacent plasterboard better.

Special case: gypsum fiber boards reinforced with plastic

There are particularly stable gypsum fiber boards with an incorporated glass fiber fabric. With these plates, you will not get far with a conventional cutter. You must bring these plates to the desired level using a jigsaw or a circular saw. You also have to reach for a saw if you want to work round shapes or smaller cutouts out of the material. If holes for ceiling lights, sockets or switches are to be made, it is best to use a classic attachment in the form of a hole saw for the drill. With this tool you get clean results.

Further tips for cutting and processing plasterboard

There are still some ways you can ease the work and come as soon as possible to the desired result. When working with the craft knife and making the first cut, make sure that the paper layer of the plasterboard is cut and you cut about one millimeter into the plaster. If you need to make multiple cuts, you can insert them into the plates in one go before separating them. Instead of breaking the plate down after the cut, you can try to break it off with only slight pressure, unless it is too long a cut edge. You can easily cut the second paper layer with a cutter in this way.

How to apply bevels to the cut edges

You can attach the necessary bevels for later filling in several ways. The simplest way is to use the craft knife for this purpose. However, you should be very careful in order to obtain as uniform a cut as possible and avoid having to cut the material too much.

Product Image: fotogenicstudio / Shutterstock


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