How To Cut Plasterboard: A Step-by-Step Guide

Cutting plasterboard may seem like a daunting task, but with the right tools and a little bit of know-how, it’s actually quite easy! In this guide, we’ll show you everything you need to know about cutting plasterboard, from what tools you’ll need to how to cut it without making a mess; whether you’re a professional contractor or a DIY enthusiast, this guide will show you how to get the job done quickly and easily.

In order to make the process as simple as possible, we’ve broken it down into two sections: the tools you’ll need and the method of cutting. We’ve also touched on how to cut a hole into plasterboard as well, should you need to make any openings whilst you’re cutting. So whether you’re starting from scratch or just looking for a refresher course, keep reading for all the information you need!

What Tools Do I Need?

Plasterboard is such a versatile material that can be used in a number of applications from timber framework to stud walls and brickwork. So, what exactly do you need to cut plasterboard? Well, not a lot, luckily. Plasterboard is a very easy material to cut; plasterboard cutting requires only very basic tools, so there’ll be no splashing out on specialist equipment.

First of all, you’ll need a sharp knife. A Stanley knife or craft knife will do the trick. You’ll also need a straightedge to help you make clean, straight cuts and a tape measure to get those measurements exact.

Let’s map it out below:

1. A sharp knife: This is probably the most important tool you’ll need. A dull knife will make cutting through plasterboard much more difficult, and it can also be dangerous. The finer the teeth, the cleaner the edge. We recommend using an ordinary timber saw (or a fine-toothed saw/plasterboard saw) or a Stanley knife.
2. A straight edge: This will help you make clean, straight cuts. You can use a ruler, a level, or even just a piece of string stretched tight.
3. A cutting board: This isn’t strictly necessary, but it can help to protect your surfaces from scratches.

Now that you have your tools, let’s get started!

The Cutting Process – How To Cut Plasterboard

1. First, you’ll need a sharp utility knife or a drywall saw. Plasterboard is pretty tough as you’ll need to work through the gypsum core and its lining, so you’ll need a sharp blade to make clean cuts.
2. Next, mark your cut line on the plasterboard. Use a straightedge to make sure your line is nice and straight.
3. Then, score the straight line with your knife or saw. Make several passes back and forth until you’ve cut through the paper surface of the plasterboard.
4. Finally, snap the plasterboard along the scored line. Apply pressure evenly until the board snaps cleanly in two.
5. Cut along the fold line from the back of the plasterboard sheet and remove the off-cut by slicing your knife through any lining that remains intact.
6. If any of your cuts are uneven, a pass or two with a drywall rasp will smooth it out nicely.

And that’s all there is to it! With a little practice, cutting plasterboard will be a breeze.

How To Cut a Hole in Plasterboard

To do this, you will need a saw and a plasterboard hammer. This type of hammer has a sharp point that is used to puncture the paper layer of the plasterboard.

1. First, with great precision, measure and mark the cut that you need to make with a pencil.
2. Simply place the axe-shaped end of the plasterboard hammer on the marked spot and bang quickly into the board about 50mm inside one of the cut lines you have drawn. The plasterboard will easily break away, leaving a hole that’s perfect for running wiring or plumbing.
3. Insert your saw into the gap you’ve created with your hammer and start cutting around the lines of the opening.

How To Fix Plasterboard

If you’re wondering how to go about fixing plasterboard/insulated plasterboard, we have a new guide that will take you through the process. Check it out here.

Whether you are thinking of nailing plasterboard or dot and dabbing it, we sell all the accessories you could possibly need from drywall screws to plasterboard adhesive. After you cut and fix the boards, get your hands on some plasterboard joint filler to bed and fill the joints.

And there we have it. We hope you found this guide helpful!