How to cut drywall correctly. The nuances of cutting drywall depending on its type

How to correctly cut sheets of drywall

Such a simple matter, at first glance, as the preparation of drywall sheets for further use, many novice builders have difficulty. What kind of tool to choose and how to use it, this will be discussed further in the article.

You don’t need any special tools to properly cut a sheet of drywall. They are all in the kit of every repairer and builder, even at the amateur level. In the work you will need:

  • A well-sharpened pencil used for marking.
  • A tape measure, at least three meters long.
  • Metal ruler or part of the profile.
  • Tools for cutting drywall: knife (clerical or universal), hacksaw, jigsaw, circular saw.
  • Deburring planer. designed for processing the edge of the cut. It is best not to try to replace it with a file or use a kitchen grater. The quality will not be the same, and its price is not high, you can afford to buy.

The composition of the drywall

The outside of the material is made of thick cardboard, and inside it is filled with a pressed mixture of gypsum. The oblong sides generally have an edge with rounded or converging corners, protected by cardboard. No edging on the end edges.

Gypsum plasterboard of several varieties is made:

  • Conventional (gray gray).
  • Weatherproof (GKLV). Green on the outside.
  • Fireproof (GKLO). Produced in pink or light purple shades.
  • Waterproof (GKLVO). Has a dark green color.
  • Soundproof. It is produced in a blue shade.

Typically, standard sheets have dimensions of 250×120 cm, having an area of 3 sq.m. м. Other variations are more rare: 200×120 cm (2.4 sq. m), 200×120 cm (2.5 sq. m), 200×120 cm (2.7 sq. m). m) and 300×120 cm (3.6 sq. m). м). The thickness of the material can reach 12.5 mm, used for finishing walls. When erecting ceiling structures, 9.5 or 6-mm sheets are mainly used.

The image below lists the main standard dimensions of drywall with an indication of the approximate weight of 1 sheet. Knowing the weight allows you to determine the approximate severity and bulkiness of the material, pre-estimating its capabilities of use. Carry out work with the sheets should be extremely carefully, since not enough careful handling they can not withstand the load and break.

Regardless of the type chosen for finishing, all drywall is cut in the same way.

Cutting drywall with a hacksaw

Hacksaw. also a kind of saw, but already manual. The tool usually costs a few hundred. The blade of a hacksaw is different. It needs a smooth one with fine teeth. This is a hacksaw for metal.

Cut drywall with a hacksaw

When working with drywall, it gives the most even cut. The thinness of the saw blade allows it to easily bend inside the sheet, passing exactly along the curved markings. Start the process:

  • After marking the drywall and making a drill or a knife in the corners of the drywall holes for the entrance of the blade of the hacksaw.
  • By inserting the hacksaw into the kerf and sawing to the opposite point.
  • Finishing the edges of the cut with improvised means.
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It does not matter what side to cut drywall with a hacksaw, but in what place it is important. When cutting the sheet from the edge, the tool gives a smooth, neat line for the trimmer, although it takes a solid amount of time. Through-holes on the drywall panel with a hacksaw give uneven. Here it is better to use a jigsaw.

Handling drywall sheets after cutting

The edge of the drywall, which has been “walked on” by the working tool, does not look aesthetically pleasing. To make it smooth and even, prepared for the puttying process, use a planer and remove the bevel. For this purpose you can use an ordinary knife. Chamfer be removed for 2/3 of the thickness of gypsum plasterboard, adhering to an angle of 45 °.

How to cut a profile for gypsum board

  • hacksaw for metal;
  • Metal scissors;
  • Electric jigsaw with a metal saw;
  • Hand or bench top cutting machine;
  • angle grinder.

Some useful tips

  • It is necessary to cut drywall only on the stable and even surface, otherwise the material will bend, and it will be much harder to work with it.
  • Make sure the drywall is dry (it is afraid of moisture and can be damaged).
  • Cut large sheets in several steps.
  • The framework for drywall can be created from small parts of metal profiles, most importantly, that these pieces were securely fastened to the wall.
  • Working with the profile, you can not worry about the fact that the cuts are not quite straight and accurate. the profile will still “hide” under the drywall.

As you can see, there is nothing complicated about working with drywall. To fix the material, we recommend watching a video on how to cut drywall with your own hands:

How to cut drywall. tools, methods

Drywall is a unique material, which on the one hand allows to obtain durable structures, but on the other hand is characterized by fragility, which requires careful and accurate attitude. Despite the fact that the process of cutting this popular means of finishing is not particularly difficult, the wrong slicing. the most common mistake, leading to overconsumption of material. In the article master plumber will tell you how to cut drywall correctly.

  • Devices for drawing a marking on the sheet of glycol. a simple pencil, a tape measure, a long ruler.
  • The actual cutting and sawing attachments: Knife. The gypsum fiberboard can be cut with a stationery knife, as well as a specialized construction knife with a double-sided interchangeable blade (suitable for more dense materials).
  • Hacksaw. It is better if it is a tool for processing metal rather than wood; Electric jigsaw. Ideal for sawing rounded elements. Least of all leave chips on the ends of drywall quality saws for metal with a fine tooth; Electric drill. Needed for making holes. For the openings of big d round drill bits (which are used for mortising the heart of door latches) and feather drill bits are needed; Shaped milling cutter is used for sawing out the grooves of complicated geometry, as well as round or oval-shaped holes. In principle, when using a shaped router, the shape of the hole can be any. You can also use a router to chamfer drywall sheets.
  • Edge banding tools: Deburring planer; Chamfering planer.
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The arsenal of experienced craftsmen may include professional equipment, but for those who work with the material for the first time, this set is enough.

To better understand how to properly cut drywall, you need to clearly understand the structure of this material.

Gypsum plasterboard is a layer-by-layer combination of two types of materials. plaster (the inner content) and sheets of dense cardboard glued to it on both sides.

This type of material is divided into different types, depending on the functions endowed:

Moisture-resistant drywall is needed when used in rooms with an increased amount of vapor in the air. Fireproof drywall is used where there are fireplaces, and near places with sources of open flame.

Depending on the type of drywall, their thickness also differs, which affects the difficulty of cutting.

The thickness of ceiling plasterboard is 9.5 millimeters, wall. 12.5 millimeters, the arch. 6.5 millimeters.

Consider a few peculiarities when cutting drywall:

  • The drywall sheet needs to be placed on a flat, stable surface, because it is very flexible.
  • If the sheet of drywall is large, the cutting should be done gradually.
  • Before you place the sheet on the work surface, make sure it is dry. Wet sheet will not be good for the job.
  • Cutting is recommended to be done from the side that will be against the wall. This will allow you to later hide possible shortcomings formed during cutting.
  • It is necessary to protect the eyes and respiratory system with personal protective equipment.

When cutting drywall is not allowed to use a circular saw because of its ability to create large amounts of harmful dust.

What method of cutting drywall to resort to, it will become clear after studying the options that exist for this purpose.

General rules for cutting drywall

The gypsum particles inside the cardboard cover are light and volatile. Mineral particles in the paper will fly up into the air when you cut it, landing in your eyes and respiratory tract. Therefore, it is advisable to wear a protective mask.

If the gypsum dust settles directly on the floor, it is difficult to wash off the powder. There will be streaks. If the floor has a porous surface like frosted porcelain tile, the gypsum particles will be trapped.

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A solution of warm water with sunflower oil at the rate of half a cup of the product for 10 liters becomes a lifesaver. After the floors are wiped with a vinegar solution.

The method is not suitable for glossy surfaces. You’re better off with a solution of manganese dioxide. It is added to warm water until it turns light pink.

The structure of the material

To properly cut the material, it is worth learning about how it is constructed. The inner layer consists of gypsum, in which fillers are added. The outer layers are formed by cardboard, which helps to increase the strength. Since gypsum is a fragile material, without cardboard, the sheets can fall apart from a slight mechanical impact.

Gypsum board is divided into several types:

drywall, correctly, nuances, cutting

Water-resistant gypsum board is used during wall cladding work in rooms with high humidity. Fireproof material is necessary for finishing walls around stoves and fireplaces. Plasterboard is used for finishing other types of rooms. To understand how to cut drywall at home, it is worth considering the features of different tools.

drywall, correctly, nuances, cutting

The correct cutting of the metal profile

Firstly it is necessary to make a marking using a tape measure or a ruler, making marks with a marker. The very process of cutting the profile with scissors for metal is as follows:

  • Perpendicular marking should be made on the product.
  • Further on it requires to carry out the trimming of the side planes.
  • Then it is necessary to bend along the line of marking.
  • The last thing to do is to make the cut along the fold.

When cutting a mullion profile it is necessary to take into account that it has additional stiffening ribs, which are sometimes somewhat uneven, so sometimes they need to be trimmed with scissors. Slats up to 1 m long can be cut by weight, but longer slats must be fixed in a vice or on a support.

For small sized lintels or structures, the profile must be cut at a 45° angle. The first thing to do is to cut off the slat of the desired length, and then you need to mark the angle of the incision and cut it off.

Having learned what to cut the profile for drywall, you know all the basic tools, of which you can choose the most convenient for yourself and make them properly cut with your own hands.

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