How to cut drywall at home. How and with what to cut drywall at home with minimal losses

Drywall sheets are used to make interior partitions, ceilings and shelves. In order to install these structures, you need to know how to cut drywall. This can be done different ways.

A tool for marking and cutting drywall will help you get correct and even cuts

What Tool to Use to Cut Drywall

Even if you haven't worked with drywall before, you probably know that this material is produced in the form of large rectangular slabs. Therefore, no matter what design you make, you cannot do without cutting drywall. Large slabs are only convenient for sealing large area.

The cutting tool is useful for creating complex structures, and for giving a sheet of drywall required sizes

To cut drywall, craftsmen most often use a mounting knife, a hacksaw and an electric jigsaw. But if these tools are not at hand, you can cut drywall with both a cutting machine and a drill in the “grinder” mode.

How to cut drywall with a mounting knife

The mounting knife is suitable for cutting large longitudinal pieces of drywall. Having done necessary measurements and having drawn the line along which you will cut, attach a metal ruler to this line, and, holding it firmly with your hand free from the mounting knife, place the tip of the knife on the line. It is not necessary to use a metal ruler; any substitute with a sharp edge will do. Being careful, cut the cardboard exactly along the line.

A regular mounting knife is suitable for cutting long longitudinal strips

The cut sheet is bent and finally cut at the fracture site

If you are cutting the material on a table, move the slab so that the cut protrudes 1-2 cm beyond the edge of the tabletop. Break the core with light taps, then turn the slab over and cut the drywall at the break point. If you are cutting on the floor, you can lay wooden beam under a slab of drywall to break it. When the core is broken, the beam is removed from under the sheet, the sheet is turned over and an incision is made. To make the resulting edge smooth, you can process it with a plane.

To make the edge smooth, you can additionally process it with a plane.

How to cut drywall with a hacksaw

A hacksaw is necessary for cutting square and rectangular openings in drywall. The thinner the blade of the hacksaw you use, the better. To cut out the opening, the drywall is first lined with reverse side. Then, in one of the corners of the future opening, a drill is used to make a hole of such a diameter that a hacksaw blade can freely pass through it. It is easier to cut if you drill holes along all the drawn sides. When the opening in the drywall is cut, level the edge with a plane, and if dimensions do not allow, use a file. When cutting drywall with a hacksaw, remember: the blade of the tool must be perpendicular to the plane of the sheet. Then the edges are as smooth as possible.

A hacksaw expands the possibilities when cutting a sheet of drywall - it can be used to cut small holes

Cutting drywall with a jigsaw

The fastest method is considered to be cutting drywall using electric jigsaw. Of course, you will have to spend money to buy this tool (if you don't already have one), but the jigsaw is worth the money. After all, with its help you can cut not only strictly shaped openings, but also make curved lines. Simply lay out the slab the way you need it, and then lay the sheet on two stools, leaving a distance between them so that the cut line runs in this space.

A jigsaw perfectly cuts drywall, coping with complex lines and saving time and effort.

Having placed the jigsaw blade at the beginning of this line, begin to smoothly cut out the parts from the drywall of the required shape. Round holes should be marked using a compass. To cut drywall, drill a hole inside the circle and run a jigsaw blade through it. Cut out the required circle along the drawn line.

Cutting drywall with a jigsaw does not require much physical effort, takes less time and produces less waste.

If you are cutting drywall with a jigsaw, the resulting edges will require minimal finishing because of all the drywall cutting tools, only the jigsaw can be held perfectly perpendicular to the surface of the sheet. For this purpose, its design includes a special sole.

Sometimes you need to cut drywall in the shape of the letter L (for example, for a doorway). Then you need to use several types of drywall tools. The short part is sawn through with a hacksaw, and the long part is cut through with a mounting knife. The slab is cracked and cut from the reverse side. This work can be done on an already installed sheet.

How to cut drywall with a knife without a table: video

Creating arches and niches from plasterboard causes many difficulties for inexperienced people. For example, during renovations it is often necessary to cut sheets of drywall. To do this more efficiently and quickly, it is worth knowing which tools are best to use and how to cut better. Before you learn how to cut drywall, you should prepare the necessary tools.

What tools should you use?

If you need to cut drywall quite often, it is better to purchase professional tools. If cutting is done infrequently, you can use the following tools:

Tools for measuring the length of drywall, as well as a level and pencil. Measurements can be made with a ruler or tape measure.
Construction knife. You can also use a reinforced stationery knife. If necessary to cut a large number of sheets of the specified material, it is worth using construction knife. Since it is more durable and can withstand heavy loads.
Planers. One of them is needed for chamfering. The second plane is roughing. These tools are used on final stage works when it is necessary to make the edges smooth. Minor irregularities are filled with putty.
Jigsaw. The advantage of this tool is that it allows you to make straight and curved cuts. With such a tool it is enough to guide along the drawn lines.
Hacksaw for metal. This tool can also be used to cut cardboard. It is also used when cutting frame elements made of metal profiles.
Electric drill, cutter. These tools are necessary for cutting rounded elements and circles.

To understand how to cut drywall, it is worth determining exactly what parts will be cut. For straight lines, a mounting knife can be used.

Material structure

To cut the material correctly, it is worth learning about how it is structured. Inner layer consists of gypsum to which fillers have been added. The outer layers are made of cardboard, which increases strength. Since gypsum is a fragile material, without cardboard the sheets can fall apart from slight mechanical stress.

Drywall is divided into several types:

fire resistant;
waterproof;
ordinary.

Waterproof plasterboard is used during wall covering work in rooms with high humidity. Fire-resistant material is necessary when finishing walls near stoves and fireplaces. The usual one is used when finishing other types of premises. To understand how to cut drywall at home, it is worth considering the features of using different tools.

Using a mounting knife

When using a knife, cutting drywall occurs quite quickly, and the quality of the cut is quite good. Cutting sheets of the described material occurs as follows:

First you need to take measurements and draw a line. The easiest way to do this is with a marker. To ensure an even cut, a metal profile can be placed on the edges of the line.
After this, you need to place the knife on the edge of the line and begin to move it with even force.
After this, you need to bend the sheet on the back side so that it cracks along the line.
On last stage You can make the cut more even. To do this, it is best to use a mounting knife.

It is worth remembering that this cutting method is only suitable for separating large sheets the material being described. This is due to the fact that when breaking small sheets, the cut may be of poor quality. Also this method Not suitable for cutting oval lines. After carrying out the described work, it is necessary to use a drywall plane to make the cut more even.

It is more convenient to cut material on a flat surface; it is best to use a table or perform all operations on the floor. It is important to clean the surface before carrying out work.

Features of using a hacksaw

The specified tool is used only if figure cutting. For example, often during repairs they create semicircular arches. When using a mounting knife, such work will not be possible.

When using a hacksaw, all actions are performed in the following order:

Marking. First, lines are drawn on the drywall, after which small holes are made in the corners of the created shape. They are necessary to accommodate the hacksaw blade. A drill is usually used to create the hole.
On next stage insert the hacksaw blade into the hole created and cut to the next one.
After the cut has been made between all the drilled points, the outlined figure will fall out, forming a hole of the desired shape. To make the joints more even, you should use a drywall plane. It is worth remembering that the greater the bend of the line, the more holes there should be in the material.

In this way, you can make rectangular and round shape. It is worth remembering that when cutting round lines, you should use a thinner blade, which is more convenient to turn while cutting.

Using a jigsaw

Thanks to a jigsaw, you can cut almost any shape into drywall. Moreover, all work carried out is carried out easily even without experience. Curved lines when using this tool are accurate. All work is carried out in several stages:

First, a line is drawn along which the cut must be made. This must be done with a marker, as it allows you to leave wide lines.
After this, the sheet of drywall must be laid in such a way that there is no material under the cut lines. It is best to use several supports. The sheet should lie flat and not move during operation. By following these rules, the quality of the cut can be significantly improved.
The next step is to place the jigsaw at the beginning of the line and aim the laser sight. Then cut the material strictly along the drawn line, making sure that the tool does not move to the side.
If you don't have a plane, you can use a drywall cutter to create the corners. It is enough to put it on a drill and draw it along the cut line between two sheets.

In some cases, one tool is not enough, so it is worth using all the products described.

Creating curved parts

The most complex process is bending sheets of drywall. To do this, you need to cut a rectangular piece. When bending a workpiece, it is important to do it this way. To stretch the back side.

To bend a drywall piece, you first need to create a semicircular template. It can be made of fiberboard or the material described. Cutting out the template is quite simple using a jigsaw.

After creating the template, you need to roll one side of the part with a needle roller and moisten it with water. After this, just slowly bend it according to the template and secure it in this position. After drying, the sheet of drywall will retain the shape that it was given.

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How to cut drywall exactly the morning after celebrating your godfather’s birthday: completing 4 main tasks

How to cut drywall at home after a hectic holiday? After all, most often renovation work falls on Saturday, the first day off, preceded by what? That's right, Friday! The second day off, however, is no better, because before it is Saturday evening. It is on these days that birthdays are celebrated, weddings take place and “corporate parties” are held, after which a difficult morning begins.

And even if such a fate never befalls you, it is better to be prepared for any vicissitudes of fate, being able to masterfully cope with sharp gypsum boards in any condition with the most different instruments. Such skills will not be wasted. So we simulate the situation, get used to the role and get started.

Let's get down to business no matter what

No matter how bad you feel, if you are already starting to manipulate gypsum boards, then you must remember that they are gypsum boards wrapped with cardboard on both sides, this is what you should start from when choosing tools and cutting methods.

Typically, when working with plasterboard sheets, you may encounter four different tasks when cutting them, so I’ll look at them:

Task No. 1: make an even, straight cut

Your head hurts, your mouth is dry, and you're frantically remembering how to properly cut drywall in a straight line. This is not difficult, in such cases I make do with the following tools:

As you can see, even if you are missing something, it is easy to buy, the price of all the listed tools is low.

The instructions for further work look like this:

Despite the depressed state, every effort must be made to take accurate measurements of sections, into which it is necessary to cut the plasterboard sheet, and since they are always sold in the form of large rectangular sections, cutting will almost certainly be required;
After that transfer the received data to both edges of the gypsum board itself using a pencil and tape measure. Connect the given marks by attaching a rule to them;

Now confidently apply the rule to the drawn line with one hand, and with the other use a stationery knife to move it along with pressure. Even if your hands shake, which, unfortunately, is quite possible in the simulated situation, the tool should not jump anywhere thanks to the guide bar;

Next, the gypsum board is placed on a stack of still unused samples or simply on a wooden block so that the cut part of the cardboard is in the air. The hanging part is subjected to several blows, pressure and breaks, after which all that remains is to turn the object over, cut through the paper on the other side and finish separating the fragments;

But I wouldn’t trust my “breaking” abilities much in this state. Therefore, I recommend first cutting the cardboard on both sides, driving the knife blade as deep as possible, and then breaking the product with light taps. This approach allows you not only to achieve a high-quality result with a headache, but also to do it even with very small pieces.

Now all that remains is process the resulting edge with a plane or, if it is too thin, with a file. That is, the main thing is that the tool matches the cutting height.

Task #2: Cut a rectangular hole

Now let's look at how to cut drywall at home at right angles. Here you will need a slightly different, wider range of tools:

Which side should I cut drywall with a hacksaw? From the back, so apply the markings there. To do this, use the same pencil, tape measure and rule;
Place the sheet like this so that there is nothing under the marked area, that is, for example, on two chairs or tables;
Now comes the most difficult thing for a sore head: drilling. Choose a drill so that its diameter matches the width hacksaw blade, then make neat holes in the corners of the drawn rectangle;

If you drink Citramon and calm your head, you can make holes around the entire perimeter, which will greatly simplify the cutting process itself.

Carefully, trying not to break the plaster, insert the hacksaw into the resulting opening and make a cut along the drawn line to the next corner, turn the blade there and continue working. Try to hold the instrument level, which, of course, after a fun evening will not be easy to do;

The final step is also finishing the ends.

Task No. 3: create a wavy cut

How to cut drywall according to shaped markings? You'll need it here special tool in the form of an electric jigsaw. It makes sense to buy it, even if you are definitely not going to work with gypsum board in the near future, since it is also useful when cutting wood, chipboard, MDF and even metal.

At the same time, it is easy to use: no effort is needed, and even trembling in the hands is compensated by the special sole, which sets the file exactly at an angle of 90 degrees.

There are no special saws for drywall on sale, so I recommend using blades for metal. They have the smallest teeth, which makes the cut perfectly even and smooth.

The work flow in this case is quite simple and looks like this:

Apply the markings. If the noise in your head interferes with drawing the necessary smooth lines, then it is better to ask someone who was not at yesterday’s party to do this, since the rule will not help in this case;
Install the plasterboard as in the previous case, although if the part to be cut is small, then you can simply hang it from a table or a stack of unused sections. Just remember to then be sure to hold the sheet with your free hand so that it does not wobble, interfering with making an even cut;
Bring the blade to the beginning of the intended pattern, turn on the device and carefully slowly move it along the line, turning in the right places;

The process of cutting the plaster part with a jigsaw is accompanied by an abundance of rising dust. Therefore, I recommend putting on a respirator and safety glasses in advance to protect your eyes and respiratory organs from it.

When finished, inspect the edges; it is likely that they will not even need to be further aligned.

A jigsaw can give a wide variety of shapes to the section being processed, including a large circle. But for a small circle you will need a different approach, described below.

Task #4: create a round hole

Small perfect through circles in drywall are required for installation lighting fixtures. And they are also difficult to make without special equipment, which consists of a drill and a metal bit.

Well, let's get started:

Draw a cross using a rule and a pencil in the place where an opening is needed, then select the nozzle required diameter and install it on the drill;
Place the sheet on two reliable supports . Although the described task can be carried out generally after installing the gypsum board on;
Place the tip of the drill protruding from the crown towards the center of the drawn cross and start drilling at low speed. There is nowhere to rush, and your head will hurt less from leisurely drilling;

The edges of the cut circle are rarely processed with a file, since in the future they are still covered by the lamp shade.

If there is no suitable crown and it is not possible to purchase or use it, then you can go a more “barbaric” route:

Place a compass in the center of the drawn cross and draw a circle of the required diameter with it. If you don’t have even such simple props, use a glass or cup;
Drill many holes along the marked line and knock out a plasterboard circle. This is where you may still need to process the edges, as they may end up with a lot of jagged edges.

Conclusion

Now you can calmly relax on Friday and Saturday evenings, confidently knowing that in the morning, despite the deplorable condition, you will still be able to make a drywall cut of any complexity. The main thing is to be able to show the necessary concentration at the right moments and strictly follow the instructions given above. Remember, someone, following them, has already done everything successfully before you and with worse health.

In the video in this article you can find a number of additional information, which is directly related to the presented materials.

If you have any questions on the topic, please ask them in the comments.

October 1, 2016

If you want to express gratitude, add a clarification or objection, or ask the author something - add a comment or say thank you!

Installing drywall requires creating parts with different configurations. At home, the apartment owner makes such decisions infrequently, so purchasing expensive electric saws impractical. General purpose tools are suitable for cutting.

Selecting Tools

On industrial enterprises Drywall is required in large quantities. Therefore, special hardware installations have been developed for cutting gypsum boards. At home, everything is much simpler - improvised tools that can be found in every apartment are used.

In order to avoid additional planing of each detail at the end of the work, it is necessary to cut the drywall as evenly as possible. To achieve this goal mark the markings on the plaster using a pencil and a measuring tape. If the latter is not among the tools or the length of the drywall exceeds 2.5 m, then you can mark the surface using a metal profile.

Several tools can cope with cutting drywall:

cutter (hacksaw) for metal or wood;
jigsaw;
construction knife with replaceable blades;
electric drill.

Last tool Suitable for drilling even circles of small diameter. As the radius increases, it is necessary to use feather drills or rounded saws.

An electric drill is suitable for creating holes for the core door locks. A regular hacksaw for metal or wood can cut drywall. The tool is distinguished by a thin blade with a frequent row of teeth. Preserved between sharp ridges minimum distance to prevent the formation of nicks.

Dense sheets of drywall can be cut with a construction knife. The device is easy to use due to its double-sided sharp blade. Over time, the core becomes dull, but manufacturers put several additional elements. Therefore, if necessary, the blade can be easily replaced with a new one.

To cut drywall with a construction knife, you need to mark it and place a metal ruler along the pencil mark. Holding the profile, make a cut with a knife. If the plaster is of small thickness, the construction knife can be replaced with a stationery knife.

To decorate a room with a high humidity coefficient, take moisture resistant drywall, which contains antiseptic elements. They give the surface of the plaster a greenish tint. Additional components do not affect the density indicator, so it is possible to cut moisture-resistant drywall using similar tools for cutting the classic version.

Correct cutting

A few simple rules will help you cut drywall correctly:

Working with plaster requires taking safety precautions. Even a pinpoint cut or small break crumbles the material. This releases dust that is hazardous to the body. Protect your eyes and lungs with goggles and a respiratory mask.
It doesn't matter which side you cut the drywall from. However, experts recommend starting with the surface that will be in contact with the wall or ceiling.
Cutting a profile leaves behind jagged edges. You should not waste time on leveling them, because subsequently the flaws are hidden with plasterboard.
Drywall sheets should be cut in dry rooms. In conditions high humidity the material swells quickly and becomes unusable even after drying.
Flexible drywall can be cut correctly on a stable surface with a smooth surface.

Myself facing material consists of two layers of cardboard. They are covered with a thick gypsum layer. This structure provides fire resistance and strength by increasing density. Therefore, to implement a point cut, it is enough to deepen the cut several times with a sharp blade using gentle movements from top to bottom. After which the sheet must be broken along the cut line. In this case, it is important to keep the drywall in one position, preventing the blade from moving when cutting the cardboard layer.

This is effective when cutting drywall that is leaning against a wall surface. You can hold the layer of material with your foot.

On the wall

Finish if necessary plasterboard material window opening or wall corner, gypsum board cutting is carried out directly on the load-bearing surface. In this case, the plaster edge coincides with the edge of the wall. To create such a model, use a piece of drywall bigger size than required. The material is attached to the wall surface, after which excess elements are cut off from the plaster.

The procedure requires reliable fastening to a supporting surface. Cutting begins from the side of the plasterboard sheet, which fits tightly to the support. Pressing down on an unnecessary part, it is necessary to draw along the marked line several times. After this, the remaining cut elements are cut off from the reverse side.

Holes for lamps and sockets

Specialists cut holes for sockets or lamps after installing and securing the drywall. For beginners, you can do without preliminary fastening. For this purpose, it is first necessary to accurately calculate the position and parameters of the future hole.

It is important to remember that the lumen itself is small in shape, which is subsequently hidden by additional plastic frame(for decorating a socket or lamp base).

All calculations must be applied from the back surface of the drywall. For the cutting itself you will need a screwdriver or drill. The tool must have additional circular attachments with fine serrated blades. If you don't have a gun, a classic hacksaw will do. The holes are uneven, but correspond to the calculated parameters. All flaws are covered with canvas.

Uneven line

When cutting drywall in the form of a wavy curved line, you cannot get by with a regular hacksaw or construction knife. When using them, smooth curves turn out to be uneven. To achieve a perfectly smooth surface, you need to purchase or rent a jigsaw with small blades. In this case, the tool creates great amount gypsum dust. Because of this, it is necessary to take care personal protection eyes and lungs.

Upon completion of the manufacture of parallel parts, bending of the plasterboard elements follows. The first step is to create a rectangular sheet of gypsum material that matches the size of the space between the straight pieces. A centimeter tape measure will help you measure your step correctly. Thanks to its flexibility, you can measure the arch length along the bend.

The front surface has an increased density compared to the back side of drywall. Because of this, the arcuate part is bent in such a way that the back surface of the material is stretched. To bend the future arch evenly, you can resort to a template. The latter is made of plywood.

On one side, the arc is bent with a needle roller. In this case, it is necessary to constantly press on the drywall. The roller needles will penetrate the gypsum material up to 5 mm.
At the end of the work, the surface of the drywall is moistened with water until softened. This stage requires a long time and patience. As the drywall swells, it needs to be gradually bent.
As soon as the part settles tightly in the template form, it is fixed until completely dry.

For sloping elements with a radius of more than 40 cm, the bend is not so steep, thus the manufacture of the part does not require additional wetting. Identical elements of a wavy type can be realized using transverse cuts. The result is an accordion that needs to be secured with a primer. When bending drywall, all cracks must be filled with putty.

For high arches it is not possible to bend the gypsum material. When installing such an element, triangular cuts are made with scissors in increments of up to 10 cm. The distance depends on the steepness of the bend.

Circle

Achieve it perfectly round hole easily using a drill with special drill bits. The nozzle is pressed perpendicularly to the surface of the drywall. By pressing the trigger, they begin to drill a hole.

Create decorative holes large diameter or rounded parts (for example, wavy elements) the drill is not capable of. A hacksaw can easily cope with such a task by cutting the internal elements. To do this, you need to cut a line and insert a canvas with pencil markings. Then it is sawed according to the markings.

It is inconvenient to work with a hacksaw with drywall on the floor, so it is best to place a sheet of plasterboard on the table. Moreover, the plaster will have to be laid in such a way that the cut part is outside the countertop.

Experts can cut with a regular knife, then knock out the circle with a sharp push. However, in the absence of professional skills in working with drywall, an uneven gap will form with jagged, chipped edges.

In a straight line

Before starting work, you need to take measurements in the room so as not to make mistakes when cutting parts. A simple pencil will help you mark the cut lines. It is better not to use a marker or pen. Caustic ink leaves marks that show through the putty layer.

When drawing the main lines, you must first make equal marks at the top and bottom of the sheet. After this, apply a level or a metal ruler to the points, along which a straight segment is drawn.

Upon completion of the calculations and application of the appropriate markings, the drywall is placed on a surface parallel to the floor. For cutting, it is more convenient to use a construction knife, since the sharp blade can be adaptively adjusted during work. It should be remembered that the length of the tip should not exceed the thickness of the drywall. It is recommended to make the cut using a metal ruler, which is placed on top of the pencil markings. To create a straight line, you need to additionally run the cut 3 times with the tool.

If a layer of plasterboard is placed on a table, it is necessary to move the plaster so that the part to be separated does not come into contact with the table surface. Once the cut is deep enough, you should pick up the edges of the drywall and break along the line with a sharp movement. For the final cut, an additional cut is made on the opposite side with a construction knife.

When sawing drywall on the floor, after additional movements, the drywall product must be placed in a vertical position. The cut part must be separated from the unnecessary part with gentle pushes along the front side (make a break). After which the remaining fragments are cut with a blade.

It is important to remember that you should not use it to cut drywall. circular saw. Fine teeth rotating at high speed produce a dense column of dust. Solid particles settle in the lungs and on the mechanical parts of the tool, causing damage to both the person and the inside of the circular saw.

Letter "G"

The shape of drywall curved in the letter “L” is used for lining a door or window opening, as well as when creating any corner model.

The work begins with calculations and marking the line with a pencil. For implementation, you can use a hacksaw if you don’t have a specially serrated drywall saw at hand. Gypsum is a soft, pliable material that does not create problems when cutting.

Using a tool you need to cut out a short part. The long one is cut out according to the “straight line” method.

Edge processing

The work doesn't end with cutting the drywall. Sharp and uneven edges need to be smoothed. You can handle nicks and chips using sandpaper.

It is recommended to level with gentle movements until you reach smooth surface. Upon completion preparatory stage fasciation is carried out. Two-thirds of the thickness of the drywall sheet must be cut off from each edge. Next, a chamfer is cut at an angle of 45 degrees with a plane. If not suitable tool, you can use a regular knife.

In this article we will learn how to cut drywall at home. In the previous lesson, we completely made a frame to which you can already attach drywall. But the gypsum boards themselves must first be cut to size. Now we will figure out how this is done.

How and with what to cut drywall at home

The answer to the question of how to cut drywall at home is very simple - for this we need an ordinary sharp painting knife.

It is highly undesirable to use an electric jigsaw to cut gypsum board.

How to cut part of a leaf

So, we place a sheet of drywall with the inner (back) side on the floor (table) or place it upright, with its elbow on the wall, with the inner (back) side facing the wall, the outer (front) side towards you. Using a tape measure and a pencil, mark the distance that needs to be cut on the outer (front) side of the gypsum board. Make two marks on the top and bottom of the sheet with a pencil:

Then we take the rule ( building level, an even strip) apply to the marked marks and mark the line.

It's better to repeat it twice.

After we have cut the paper, we need to refract the sheet along the cut we made. To do this, take a sheet and turn it towards you inside. We clamp one part of the sheet into left hand, the second (cut off) to the right. Moderate movement right hand on yourself (you can also help synchronously with your knee) break the sheet along the cut made:

The sheet broke exactly along the cut line:

The straight cut is ready.

How to make a cutout in a sheet

But what to do if plasterboard sheet you need to make a cut:

or holes, cuts, for example, for utilities, pipes. After all, if you just run a knife along each of the three sides of this rectangle and then start breaking it out, then nothing will come of it. If we apply force, a fracture will occur that is not at all along the contours we need. So what should we do? Here we need to act differently.

To do this, take a knife for drywall, colloquially “Fox”:

and saw through two sides:

And we simply cut through the third side with a painting knife - only paper:

Lightly hit the spot:

All that remains is to cut the paper on the other side with a knife:

The cutout is ready.

Below is a link to a video about another drywall knife. I haven’t worked with him personally, but judging by the video, he cuts quite interestingly. In principle, if you are working with any tool for the first time, then, of course, you need to adapt:

In this article, we learned how and with what to cut drywall at home.