How to cut a ceiling plinth in the corners

How to cut a ceiling plinth: work with or without a tool

Any repair needs attention to the smallest details. How well the finish is made, depends on the appearance of the room and its overall perception. To a greater extent, this applies to the ceilings, which in most cases are not perfect, so to hide all the imperfections (their and the walls), many owners use ceiling skirting boards, which give the rooms completeness. If the installation of baguettes in straight areas is not particularly difficult, the joints of the elements in the corners require maximum accuracy. Therefore, many owners who are planning, or have already started the repair, are interested in how to cut the ceiling plinth, what tools can be used for this stage of the work.

The answer to the question of how to cut a ceiling plinth, depends on what material it is made of. Cutting is different, because the baguettes have different density. Therefore, the first thing to consider is the most popular materials, and at the same time the peculiarities of their cutting.


Such products have the lowest price, because the material is very resistant to mechanical impacts. Foam is easily scratched, damaged by accidental impact. Pros. minimum weight, which simplifies gluing, easy processing, the ability to paint in any color.

This foamed material consists of small grains which can easily be separated from each other. However, they are the main disadvantage of such baguettes. They require very sharp tools. Otherwise, the skirting board could crumble, so it would be unsuitable for installation. This is true for both corner and straight cuts.


This contender is more expensive, but it does not differ from the first candidate very much, since it is a “relative” of Styrofoam: it is produced from expanded polystyrene. This material also consists of small granule bubbles, but they adhere to each other more densely. But Styrofoam will not tolerate a blade that is not too sharp, it will also crumble. Therefore, the master needs to prepare no less than a sharp instrument of labor.

The main advantage of foam and polystyrene foam is their softness, which allows you to avoid gaps by pressing the workpieces tightly to each other and to the corners.

Extruded polystyrene foam

PEPS is made from the same raw materials as conventional polystyrene foam, but in this case using a different, more sophisticated technology. Conventional PVC is made with steam, which is run through microgranules.

To obtain extruded polystyrene foam, the particles are mixed at high temperature and the same pressure, and then a foaming agent is added to the raw material. The granule size in this material is much smaller (maximum 0.2 mm), as a result it crumbles less and is more durable. Very sharp tool for its cutting is not required, but bluntness of the cutting edge is also not welcome.

Polyvinyl chloride

Plastic baseboards (PVC). another type of ceiling products. They are usually purchased for bathroom finishes. If we consider the topic “How to cut a ceiling plinth“, in this case they are exceptions, because to dock them use special, ready-made corners.

Generally, these skirting boards can be cut with a utility knife, metal hacksaw or a sharp kitchen tool. As PVC products do not restore their shape due to lack of elasticity it is not recommended to put too much pressure when cutting them.


This is another representative of polymer products. It has a high density and lacks the disadvantages of previous competitors. It is easy to cut, so the tool must be sharp, but there are no maximum requirements for its sharpening. Polyurethane skirting boards do not crumble, do not deform, with honor endure almost any pressure.


This traditional material is cut with the usual carpentry tools: for example, a jigsaw, hand or electric. Areas of the cut should be processed with sandpaper or a file. Since such products are more expensive than other skirting boards, care is required when working. It is easy to make a serious mistake, but there is no way to correct it. The consequence of negligence will be the purchase of a new baguette.

The ideal tool for cutting wood would be an electric mitre saw. The biggest disadvantage of it is the high price, especially for quality models. On the other hand, buyers have the opportunity to find an inexpensive tool that will adequately cope with the work.

The tools you use

First, how to cut a polymer or wooden ceiling plinth, how to do it correctly and quickly. In this case, the work will require 2 tools. a wire cutter and a cutting tool.

How to cut baseboards?

As for the latter, the choice depends on the baseboard material:

  • Foam products (all polystyrene) assume the use of a sharp office knife;
  • Polyurethane baseboards are usually cut with a hacksaw for metal;
  • Wood requires “active” participation of a jigsaw or a saw.

The second potential tool for polyurethane is the same office knife. The reason is quite low density of the material. Another alternative is a sharp, sharpened kitchen knife. The special requirement for it is not too thick blade.

A possible substitute for a wood jigsaw is a metal hacksaw. The blade that has the smallest teeth is optimal. Otherwise, the tool will get stuck in the material, and in such conditions it is extremely difficult to make a flawless cut.

The chisel and its self-made

The chisel is the second indispensable tool for working with baseboards.

What is it?

Not everyone may know what it is. This is a device that allows you to cut any workpiece at different angles (45-90°). It is a trough, consisting of the bottom and two sides, in which slots are made for tools. The material is placed on the bottom of it, and the hacksaw (knife, etc.) is inserted into the slots. д.). After sawing baguettes with his help get almost perfect blanks.

ceiling, plinth, corners

Chisel. a necessity for trimming any baseboards, because the joints of the elements require a 45° angle. Otherwise, the connection of parts will not work: or between the adjacent skirting boards will remain a gap, or they simply will need to be trimmed again, as to dock the adjacent products will be impossible.

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Yes, the remaining hole can be covered with a compound. But this is still not the best solution. The filler may soon change color a little, and this discrepancy will be very noticeable. However, even here there is an exception.

How to make a mortar?

For self-made will need to find a board length of about a meter or more, or a sheet of plywood (chipboard). It is still necessary to prepare:

  • From the selected material, cut 3 parts with a width of 200 to 250 mm, their length. 300 mm (400, 500 mm). Using self-tapping screws, they are connected in a “U” shape.
  • Using a protractor, on the tops of the sides make marks corresponding to an angle of 45 ° (if necessary, and 90 °).
  • Then take a hacksaw, which sawed holes so that the grooves reached the bottom of the tool.

Finished holes are reamed with a rasp, so that a jigsaw or hacksaw can freely enter into them.

A baseboard planking plier: basic rules for use

Everyone will be able to understand how to properly cut the corners of the ceiling plinth. For the process to go smoothly, you should familiarize yourself in advance with the main ways to create beautiful and even blanks.

The main rule of work is to observe the slope of the corners. If the baseboard is fixed to the right, the corner will be cut from the left side, and vice versa.

Chisel. a handy tool for quick processing of blanks

Polyurethane ceiling plinth: what is it, advantages and disadvantages, what is it made of, what kinds there are, how to choose, step by step installation of the moldings, coloring, restoration methods, the average cost. in our publication.

What is a plier, how to use this tool

Beginning repairs in the apartment, many people wonder how to cut the corners of the plinth on the ceiling. It is important to familiarize yourself with the rules for using the equipment. A chisel is a device that consists of walls with side slits and a bottom. The piece requiring machining is laid out in the middle and corrected with a file.

The main question. what to cut a plastic baseboard. The result should be a perfectly flat angle of 45 degrees. Sawing the baseboard is fast and easy, if you use a ready-made saw, or make it from available materials. The tool for security is placed on the floor and held with the left hand. The hacksaw should be placed in one of the oblique lines, depending on what corner should turn out. right or left.

Beginning masters it is best to fix the jig on the table, so it will not come off during work

  • draw a thin, barely visible line for the trimmer with a pencil;
  • The fillet is placed sideways in the jig and determine the angle of the cut;
  • The hacksaw must run precisely along the marked line;
  • The second fillet is turned and made a cut on the other side, so that when the two parts are combined, a corner is formed.

Before gluing on the ceiling, the corners should be processed by sandpaper.

Stucco from polyurethane: what is it, what are the advantages and disadvantages, the main types, composition, manufacturers, the main criteria for selection, the stages of independent installation, options for use with photos and cost.

The use of decorative corners

We mean the special angular adapters that are usually supplied with polyurethane and polystyrene friezes. Decorative corners are glued in the corner, and baguettes are attached to them on both sides. Fit in this case, or not required at all, or carried out with a simple office knife.

Composition and characteristics of the material

To understand how to cut a skirting board, it is necessary to understand its composition. It will help to choose the right tool and cutting technique.

  • Styrofoam. The cost and strength of this material is the lowest. But because we create a decorative ceiling decoration, the strength in particular is not required.
  • The polystyrene foam ceiling plinth is more dense. Than ordinary foam. To cut this kind of material use the most common knife.

READ How to Cut Skirting Boards onto the Ceiling Corners

Tip: Sharpen your knife well before use. This will relieve the presence of jagged edges in the areas of the cut.

Tip: The shallower and more frequent the saw blade, the more even the edges will be. You can even use a metal blade.

The introduction of an ordinary hacksaw blade

How to cut a skirting board for the ceiling correctly. Important details

The measurements needed to cut the skirting board on the ceiling surface must be made in a special way. To determine and mark the inside corner, the length must be measured from the corner itself. To mark the outer corner, first take into account that deep into the room, the baseboard will protrude a distance that is equal to its width.

It is better not to attach the skirting boards until their exact positioning has been tested and the mating skirting board has been cut. Only after a remarkable convergence in the corner of the two mating laths can begin their assembly and fastening. If the work is done with polyurethane or wood baseboards, flaws and mistakes can be corrected with a file or file. In order to attach a product made of polymer foam, you should be armed with a sharp knife.

If even after finishing the skirting boards remain even a small gap, do not rush to grief. it is very easy to seal it with an ordinary putty. Cutting a ceiling plinth accurately and gently is easy. But in order to acquire at least not very great skill, try in advance to train on small billets.

Artificial wigs are used in many different moments of life. They can be used for theatrical, concert images, or to hide certain disadvantages.

Attaching the skirting boards with decorative corners

If the walls are perfectly prepared, and the outer and inner corners are equal to 90°, it is possible to use special decorative elements to join the skirting boards. The advantages of this method:

  • ease of installation: there is no need to “learn the hand”, improving the technique of trimming parts of the baseboard;
  • Saves time: to join the elements you just need to cut them at a right angle and attach the decorative part.
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The decorative parts themselves for the joints of the skirting boards are designed:

This method of connection is the only option in the case of installation of plastic skirting boards, trimming which can not be performed without slots.

Caulking the joints of ceiling skirting boards

No matter how neatly the work is done, the joints between the skirting boards will be visible. This defect can be eliminated as follows.

  • Apply glue to the joints of the skirting boards.
  • After joining the elements, remove excess glue with a clean rag. This is done after the glue dries completely.
  • The gaps between the skirting board, the ceiling and the wall are grouted with a mixture of plaster filler and water-based paint using a rubber spatula.

Such a method is suitable for masking defects in the connection of wooden baseboards, as well as skirting boards made of polyurethane foam, foam plastic, polystyrene foam. In some cases you can use white sealant.

Using the tips outlined in this article and the necessary tools, you will be able to cut and dock ceiling plinth trim yourself.

How to cut ceiling plinth corners

Trimming ceiling skirting boards without a joiner

The walls in the room are not always straight, they may not be between them at all 90°. How to cut the ceiling plinth in such a case? You can use a simple marking on the ceiling.

  • Cut the baseboard at a 90° angle, apply it to the ceiling, resting against the corner of the wall.
  • Run a trimmer line on the ceiling surface with a pencil over the trimmer strip. Repeat the procedure with the second baseboard.
  • At the point where the lines intersect, you need to cut the fillet. The line for the trimmer must go to the part of the bar that rests against the wall.

If you do not have a jigsaw, you can measure the angle by hand

When cutting the ceiling plinth be sure to note that the inner corner is measured directly from the corner, and the outer will protrude into the depth of the room. Therefore, it is better to start with cutting the inner corner, and then move on to the outer corner. Glue the skirting board should be after the two joints formed by the mating strips coincided.

Not every interior design involves the use of ceiling plinth, but most often the overall appearance of the room seems incomplete without it. In the attachment of this element. moldings. there is nothing difficult, almost all types of skirting boards are attached to the glue. But the question of how to properly cut the ceiling plinth in the corners of the premises, can puzzle many.

After all, even in the simplest rooms there are internal corners where ceiling plinth trims must be precisely and beautifully docked. And in a more complex configuration of the room will also have to dock the skirting boards, performing an external corner. In this article, we will consider different options on how to cut the ceiling plinth with or without the help of hand tools.

First we should deal with the question of what to cut the ceiling plinth, the answer to it depends on the material from which the fillet is made. Ceiling skirting boards are currently available in PVC, Styrofoam, polyurethane and wood.

PVC ceiling skirting boards are the cheapest.

They are easy to form dents and creases that can not be repaired, so the product has to be thrown out. Also their disadvantage is electrostatic. the ability to attract dust. They can be cut with a sharp utility knife or a hacksaw.

Ceiling skirting boards made of polystyrene foam also belong to the cheap. This material is very fragile, when processing easily crumbles, so cut the styrofoam must be a sharp knife or hacksaw for metal, not making too strong pressing efforts.

ceiling, plinth, corners

Extruded polystyrene skirting boards are slightly more expensive than polystyrene boards, denser and harder to cut. However, they are less crumbly, so they are easier and easier to work with. Can be cut with a construction knife and a metal saw.

Polyurethane ceiling plinths are the most expensive at the moment. They are strong, flexible and water resistant, easy to cut with a construction knife, and do not crumble.

A disadvantage of polyurethane skirting boards is their dependence on temperature differences. For example, over a gas stove, a polyurethane skirting board will acquire residual deformations and begin to crack slightly. If you try to trim or trim such a skirting board, it may warp or otherwise deform.

Wooden ceiling plinths are dense, heavy products that can only be cut with a hacksaw, preferably with fine, frequent cogs. You can also use a cloth on metal.

Before proceeding to the listing of ways, how to properly cut the ceiling plinth, I would like to note that there is a possibility not to cut the plinth with special precision.

Special skirting board corners are available for sale, into which the edges of the skirting board can be inserted. In this case it is enough to trim the baseboard strip at an angle of 90 °, and the corner element will hide all the flaws. But this method is not always used, because the size of the corner elements are somewhat larger than the baseboards themselves, so the corners in the room will stand out against the background.

Sometimes this can look clumsy. Nevertheless, if the design of the room allows the use of angular elements for ceiling plinths, it makes sense to use them. The following instructions will be useful to those who still decided to precisely cut the baseboards to a given angle.

The first method. using a power plier

The professional jigsaw with a rotary hacksaw

Chisel usually looks in the form of a tray with vertical holes for a hacksaw. It can be made of wood, metal or plastic. This tool represents the oldest and simplest carpenter’s tool, designed for cutting wooden parts at 90° and 45° angles. There are types of such a device and for professional work, with a rotating mechanism, in them the cutting tool can be rotated and fixed in any position.

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How to properly cut a ceiling plinth

Ceiling corners are divided into internal and external, the way of joining them is slightly different.

If necessary, you can make a jig with your own hands. For this, you need three pieces of plywood or boards of equal size. First, they are enclosed in the form of an inverted “U” and make a marking of the corners. Then, according to the markings, cut slots for a hacksaw almost to the bottom, and the boards are twisted.

Inner corner

  • Taking the right measurements.
  • Install the baseboard plank in the jig so that this position exactly coincides with the placement on the ceiling.
  • The skirting board must be pressed tightly against the opposite wall of the jig. Hold it and press it down with your free hand.
  • We put the hacksaw at a 45° angle in a special hole and cut the piece.

When cutting soft materials (PVC, polystyrene foam) a metal saw or a simple construction knife is used. Then the work will be accurate and with straight edges.

Outer corner

  • Measure the length of the skirting board from the nearest wall to the outer corner, leave a trimmer fishing line on the wrong side with a pencil, marking the desired length. Take into account that the edge (its top part) must protrude a little bit.
  • The skirting board is moved into the mortiser and cut.
  • The adjacent plank, too, should be measured with a reserve and cut in a mirror reflection to the first part.

Try on the ceiling plinth: the joining of parts must be perfectly even. If the result is not achieved and there are irregularities at the joints, you can trim the edges with a regular knife to perfect the joint.

The second method. without additional tools

For an inside corner, you can use the easiest way to make a perfect join. by marking on the ceiling. Another example of how to cut a corner nice and flat.

The result is an even angle of 45° if you run a trimmer line from the intersection point to the edge of the workpiece. Note that the above method of marking works only if the corners are perfectly level.

Trimming a baseboard without a chisel

Agree, not everyone has a joiner’s tool in the household, and to buy it only for the baseboard. not a good idea. But the corners should still be trimmed, because the neatness of the ceiling finish is at stake. What to do in this case?

In fact, you can quite do without the chisel. There are even two ways to trim the corners of the baseboard without a special tool: by resorting to marking on the wall and with a drawn false chisel. Let’s start with the first one.

The work is performed as follows. For the inside corner:

  • Apply the skirting board to the ceiling, which will be installed to the right of the corner. Run straight trimmer line along the outside edge of the skirting board.
  • Place the skirting board on the opposite side of the corner and also run a trimmer line on the ceiling.
  • Mark the place where the two lines meet with an X. Place the trimmer at the corner and transfer the mark to the corner, then run a neat trimmer line from the corner to the bottom corner of the piece, this is the line you will trim the baseboard on.
  • Use a hacksaw or office knife to cut the necessary corner.
  • Place the trimmer line to the right of the corner. Run the trimmer line across the ceiling along the baseboard farther from the corner.
  • Place the baseboard to the left of the corner. Trimmer line along the trimmer to the point where it intersects the first line.
  • Mark two marks on the slat: the first is the intersection of lines on the ceiling, the second is where the room corner passes. Connect the two marks. you get a line for the trimmer trimming the baseboard. Now all that’s left is to cut the corner and, if necessary, correct the gaps.

Cutting a corner with a false chisel

The third way to trim the corner of the baseboard is not quite usual. using a kind of false chisel. There are two ways to make such a “tool”.

The first is to draw a jig. To do this, you can use plain heavy paper or cardboard: draw two parallel lines on a sheet and, using a protractor or simple angle, set off the corners with the required degree. Angle is cut in much the same way as in the case of the carpenter’s plane: put the skirting board to the “tool”, make the necessary marks and on them perform an incision.

The second way. to make a prototype of a crosscut out of three wooden boards: connect them in the form of an oblong letter “U” and make notches in 45 and 90 degrees. The same protractor can also be used for marking angles.

Chisel made of wooden planks

Cutting corners of a skirting board without a wire cutter, it is very important not to miscalculate with the length of the slat and the degree of notch itself. To avoid mistakes, at first it is better to cut blanks 10 cm longer, then try on the dry to the ceiling and only after that adjust until you get the desired result. Besides, let’s not forget that not all bathrooms have ideal angles of 90 degrees. you can’t do without correcting the products anyway.

Tip. Fix to the ceiling plinth trim plank should be only after adjusting to her corner of the next billet plinth. It is better to try on the table, not under the ceiling itself. This will take more time but the cut lines will be neater and tidier.

Thus, we have several ways to trim the ceiling plinth: with a joiner’s chair, without a chair, using a kind of false chisel. Whatever variant of execution of the corners you choose, it is important to do everything in a precise and accurate manner. only in this case you will get a truly effective tool for the final design of the ceiling, thereby making the interior of your bathroom aesthetically complete.