How To Cut Plasterboard

In this Toolstop guide, we will talk you through the different methods of cutting plasterboard.

Whether you are a professional by trade, or simply carrying out a bit of DIY, we will teach you the easiest and most popular techniques for cutting plasterboard and drywall.

For frequent fixing of plasterboard, you may want to invest in a collated drywall screw gun. Dewalt do a fantastic model - DCF620.

When it comes to handsaws, the finer the teeth, the cleaner the edge. You can refer to our hand saw buying guide for more info on this.

Plasterboard is made up of a gypsum core faced with a paper covering. To cut plasterboard, you will need to cut through the gypsum core and two layers of lining. There are many ways to cut plasterboard. We have listed some of the most popular methods below.

The first step to any plasterboard cutting application is to measure out and mark the cuts you want to make. Make sure your lines are straight by using your spirit level.

Cutting Large Sheets of Plasterboard

Once framing work is complete, you are ready to fix your plasterboard and then hand it over to the plasterer. To cut large sheets of plasterboard after framing work, the easiest method is simply by using a Stanley knife. The steps are as follows:

1. Mark out where you want to cut
   
   
2. Score a line about 3mm deep on the face side of the board using your Stanley knife
   
   
3. Lift the sheet off the ground and snap/bend the board back along the score line - it should only be held together now by the back lining
   
   
4. Cut the back face of the plasterboard sheet with your knife
   
   

Ta da! As simple as that! If you want to smooth out the edge of your cut, you can use a rasp to do so, although this isn't essential.

We have attached images below so you can visualise the process:

Cutting Awkward Shapes in Plasterboard

The easiest way to cut awkward shapes in plasterboard is by using a hand saw. However, if using this method we recommend to use an older saw as this can dull the teeth very quickly.

How to Cut L Shapes in Plasterboard

To cut L shapes, use a hand saw to cut the bottom of your L, then use the above score and snap method to cut your straight edge

How to Cut Plasterboard With an Electric Saw

For frequent cutting of plasterboard in large quantities, you can opt for an electric saw. A circular saw works wonders for this and will cut large quantities quickly and with ease. Simply set up your guide rails and you're ready to cut the same way you would any other material. To find out more on using a circular saw with a guide rail, you can refer to our guide.