How to cut the ceiling plinth outer corner

How to cut a skirting board: work with or without a tool

Any repair requires attention to the smallest detail. On how well done finishing, depends on the type of 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 (and their walls), many owners use ceiling skirting boards that give the rooms completeness. If the installation of baguettes in straight areas not particularly difficult, the joints of the elements in the corners require the utmost accuracy. Therefore, many owners who are planning, or have already started the repair, are interested in how to cut the ceiling plinth, what tools for this stage of the work can be used.

The answer to the question of how to cut a ceiling plinth, depends on what material it is made of. Cutting is different because baguettes have different densities. 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 unstable to mechanical influences. Styrofoam is easily scratched, damaged by accidental impact. Pros. minimum weight, which simplifies gluing, easy processing, the ability to paint in any color.

This foam material consists of small granules, which are quite easy to separate from each other. However, they are the main disadvantage of such baguettes. They require a very sharp tool. Otherwise, the skirting board could crumble and therefore it would be unsuitable for installation. This is true for both angular and straight cutting.


This contender is more expensive, but it does not differ from the first candidate very much, because it is a “relative” of Styrofoam: it is produced from expanded polystyrene. This material also consists of small granules, but they stick together more densely. But the polystyrene foam will not tolerate not too sharp blade, it also will crumble. Therefore, the master needs to prepare not less than a sharp instrument.

The main advantage of expanded polystyrene 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

EPPS is made from the same raw materials as conventional polystyrene, but in this case using a different, more sophisticated technology. Ordinary EPS is made with the help of steam, which is passed through the microgranules.

To obtain extruded polystyrene foam, the particles are mixed at high temperature and pressure, and then a foaming agent is added to the raw material. The size of pellets 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 welcomed.

Polyvinyl chloride

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

In general, these baguettes can be cut with a stationery knife, a metal hacksaw or a sharp kitchen tool. Since PVC products do not restore their shape due to the lack of elasticity, it is not recommended to put a lot of pressure on them when cutting.


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, and can handle practically any pressure with honour.


This traditional material is cut with the usual carpentry tools: for example, a jigsaw, hand or electric. The places of the cut are treated with emery paper or a file. Since such products are more expensive than other plinths, the work requires accuracy. A serious mistake can be made easily, but there is no way to fix it. The consequence of carelessness will be the purchase of a new baguette.

The ideal tool for cutting wooden workpieces would be an electric mitre saw. Its biggest disadvantage is the high price, especially of high-quality models. On the other hand, buyers have the opportunity to find an inexpensive tool that will do a decent job.

Tools used

First about how to cut a polymer or wooden ceiling plinth, how to do it correctly and quickly. In this case, 2 tools are required for the work. a plane and a cutting tool.

What to cut the skirting boards with?

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

  • Products made of foam plastic (all polystyrene) involve the use of a sharp office knife;
  • Polyurethane skirting boards are usually cut with a metal hacksaw;
  • wood requires the “active” participation of a jigsaw or saw.

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

A metal hacksaw is a possible substitute for the wood jigsaw. The blade with 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°). This is a groove that consists of the bottom and two sides, in which slots are made for tools. On the bottom of it lay the material, and in the slots are inserted hacksaw (knife, etc. д.). After sawing the baguettes with it you get almost perfect blanks.

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

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

How to make a notch?

To make it yourself you 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 the shape of the letter “U”.
  • Using a protractor, on the upper parts of the sides make marks corresponding to an angle of 45 ° (if necessary, and 90 °).
  • Then take a hacksaw and cut holes with it so that the slots reach the bottom of the tool.

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

Cutting with a wire cutter: outside corner

Most often, when installing ceiling plinths, home craftsmen are interested in how to properly formalize the inner corners of the room. Cutting exterior corners is performed less frequently, but with a certain wall layout and it is necessary. Let’s look at how to properly make an internal deburring, using a special tool (a jig).

First you will need to buy a jig. This tool is a tray, in which the part is fixed, and its trimming is performed. In order to measure the length of the necessary product, you need to put it to the ceiling. Next, it will be necessary to install the skirting board in the jig. Its location should correspond to the position it will occupy on the ceiling.


Important! While cutting, it is necessary to hold the tack with the left hand. It must fit snugly against the wall of the tool. The part of the product to be fastened to the ceiling must be at the top. The other part is pressed tightly to the bottom of the working tool.

How to properly cut the inside corner of the ceiling plinth. a difficult question, to answer which the corresponding photos help. Experts recommend to study them, and only after that go to work.

Once you are satisfied that the product is properly positioned in the tool, you can begin cutting. The hacksaw must have a certain angle, namely: 45 degrees. Do not apply too much pressure on the cutting tool during cutting, as it can damage the surface of the joiner. Then perform the trimming of the adjacent fillet, which is carried out in a “mirror” way.

Cutting with the power drill: inside angle

To get the inside corner right, the easiest way is to use a professional tool. Of course it can also be done without the chisel, but then it requires more effort. Let’s look at the sequence of operations for cutting an inside corner with a power drill.

The first thing to do is to determine the distance from the corner on the outside to the nearest wall. Next, it will be necessary to mark the baseboard, thus preparing it for cutting. On the outer side of the batten, you need to draw a line for the trimmer on the length of the measurement. It is worth noting that in this case the upper part of the plinth must protrude slightly.

Then you can start cutting. To do this, the ceiling plinth is placed in the cutting tool and pressed firmly against the wall. After trimming the first piece, you can begin processing the counter piece.

What tools can be used to cut corners

Cutting a ceiling plinth (outer corner) with explanations will be a good help to a beginner.

How to cut a skirting board without a joiner

Let’s say you urgently need to glue a ceiling plinth.

How to make a corner without a joiner? It is possible, but it will take more time. Proceed as follows.

  • First cut both parts of the skirting board at a right angle.
  • Mark the position of the elements on the wall and apply a fishing line to trim them together. As a result we see two intersecting lines. The point of their intersection is projected directly onto the baseboard details.
  • The skirting board is placed against the ceiling and a fishing line for a trimmer cut from one edge to the other is drawn.
  • Finishing details are made with a stationery knife or a construction knife.
  • A virtual jigsaw is drawn on paper, with lines drawn at the right angles. Skirting boards are attached to such a mortar and cut (at the same time the blade of the knife should be vertical).

How to cut the corner of the ceiling plinth with Комментарии и мнения владельцев from a specialist will help deal with this problem.

Tip! Since the inner or outer corner is far from always perfectly shaped, the ceiling skirting will have noticeable gaps in the joints.

To make them less noticeable, you should apply plaster putty to the ends of the baseboard before gluing it. After joining the elements extra putty is removed with a rubber spatula. All gaps will be filled and the joint will be less noticeable.

It is not easy to glue and properly dock the ties with the pattern. How to proceed in such a case? The answer will prompt video.

How to properly join the baseboards in the corners

Corner angles that look neat and tidy

As a rule, the design of corners, both internal and external, takes up a lot of time. Due to the fact that the ceiling plinths are characterized by a very complex shape, it is not so easy to just take and cut them at the right angle. It is necessary to cut so that they dock in a corner without noticeable gaps. To make the corners literally perfect, there are several ways.

Using a mitre saw

The chisel, as a tool, is suitable if the corners of the room are joined at an angle of 90 degrees. The tool is a “U” shaped groove, upside down. On the walls of the chute made cuts at different angles. To evenly cut the decorative element, it is placed inside the gutter, after which the element is cut at the desired angle with a hacksaw.

The chair looks like this. Can be plastic, wood or metal

Due to the fact that baseboards have a complex shape, they must be placed in the gutter so that they simultaneously pressed on two surfaces. the bottom and side. Depending on which corner is formed, the skirting board is pressed to the bottom and side, or opposite, or the near surface.

As a rule, the corners are trimmed at an angle of 45 degrees. The first thing to do is to determine the length of the skirting board by placing certain marks on it. After that the element of a decor is laid in the plane so that the mark corresponds to the maximum length of the element, after which the element is cut off. You must also remember that the left side of the baseboard is laid on the left side of the chair, and the right side. on the right.

How to cut a corner on the ceiling plinth: properly install it in the jigsaw

Ceiling plinths one side are fastened to the ceiling, and the other to the wall, so the part that is fastened to the ceiling, laid on the bottom surface of the jigsaw. It is very important to hold the skirting board firmly and firmly during cutting, because otherwise the cut surface is unlikely to be flat and smooth. After cutting off the left and right side in this way, you get either an inside or outside corner.

How to cut a corner on the ceiling plinth: properly install it in the jigsaw

First, both parts are attached to the mounting point without glue to check the quality of work. If the corners do not match, they are corrected with a suitable tool. The advantage of polystyrene ceiling plinths is that small errors can be hidden by covering them with putty.

After final inspection, a thin layer of special glue is applied to both surfaces of the baseboard.

How to make the inside corner of a ceiling plinth using a wire cutter

The technique of fitting ceiling skirting boards in the corners is almost the same, regardless of which corner it is, internal or external. After applying the glue, press the baseboard against both the wall and the ceiling. Naturally you need to control the pressure, especially if the decor elements are made of foam plastic. Not only that, you need to work with gloves so as not to smear the surface of the baseboards, which easily gets dirty.

How to trim a skirting board for an outside corner

If you cut the skirting at an angle of 90°, you will get a hole between the strips

Cut the outer corner like this.

  • Mark the dimensions of the trim by applying it to the ceiling.
  • Lean the baseboard against the near wall of the wood joiner, holding it with your left hand. Choose a 45° angle so that the handle is close to your left hand. Cut the fillet.
  • Place the second plank against the same wall, holding it with your right hand.
  • Make a 45° angle so that the handle of the hacksaw is close to your right hand. Cut.

Trimming ceiling skirting boards without a chisel

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

  • Cut the skirting at a 90° angle, lay it on the ceiling, pointing at the corner of the wall.
  • Run the trimmer fishing line on the ceiling surface with a pencil over the plank. Repeat the process with the second skirting board.
  • 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 trim that rested against the wall.

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

When cutting the ceiling skirting 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 the inner trimming, and then move on to the outer corner. Glue the strip should be after the two joints formed by the responsive strips coincided.

The first method is with a wire cutter

A professional diecutter with a rotary hacksaw

The chair 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 most ancient and simplest carpenter’s tool, designed for cutting wooden parts at an angle of 90° and 45°. There are types of such a device and for professional work, with a rotating mechanism, in which the cutting tool can be rotated and fixed in any position.

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 plinth with your own hands. You will need three scraps 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 under the hacksaw almost to the bottom, and the boards are twisted.

Inner corner

  • Getting the measurements right.
  • 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 firmly against the opposite side of the frame. Holding and pressing down with your free hand.
  • We put the hacksaw at an angle of 45 ° in a special hole and cut a detail.

When trimming soft materials (PVC, Styrofoam) use a metal hacksaw or a regular construction knife. Then the work will be neat and with straight edges.

Outer corner

  • Measure the length of the skirting board from the nearest wall to the outer corner, leave a trimmer line on the underside with a pencil, marking the desired length. Note that the edge (its top edge) must protrude slightly outwards.
  • The skirting board is moved into the mortiser and cut.
  • The adjacent strip must also be measured to a surplus and cut out mirror to the first piece.

Try on the ceiling plinth: the joining of parts should be perfectly flat. If this is not the case and the joints are uneven, you can trim the edges with a standard knife until they are perfectly flush.

The second way. without additional tools

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

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

What we will cut with?

Before you get to work, you should determine what material the ceiling plinths are made of.

Table. Materials that are used in the manufacture of ceiling plinths.

For your information! There are special fittings to facilitate the difficult process of installing the fillets. These are special corners, designed for the insertion of skirting boards in them.

They are useful in that they hide various errors made when working with the installation of the fillets. It is enough only to cut the skirting at an angle of 90 degrees, and the rest of the work for you will do the corner. It will disguise the holes and cracks, if any, will give the ceiling a beautiful appearance and greatly facilitate the work.

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How to join in the corners

If the installation of the first corner is passed, we can assume that you have almost all learned how to do. “Almost” because you still need to know how to connect the corners and trim the strips to length. When some part is glued and there is a small distance to the corner, how not to make a mistake with the length? The answer is simple: leave a margin.

At the beginning you can cut a piece 10-15 cm longer so that you can cut it a few times if you can’t cut it at once. Then you do the angle as described above, trying on the dry, all adjusted to your satisfaction with the result. Only then can you put the already cut slat in the corner and mark where you can shorten it. Trim it to exactly 90 °. It is not necessary to use a power drill. Just try to put the knife (hacksaw) perpendicular to the surface.

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Trimming a baseboard without a joiner

Agree, not everyone in the household will have a joiner’s tool, and buy it only for the baseboard. not a good idea. But the corners trim all the same need, because at stake is the neatness of the ceiling finish. How to be in this case?

You can actually do without the joiner. There are even two ways to trim baseboard corners without special tools: by resorting to marking on the wall and using a drawn false wood trimmer. Let’s start with the first one.

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

  • Apply the plank 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.
  • Apply the plank to the opposite side of the corner and also hold the trimmer line on the ceiling.
  • Mark the place where the two lines meet with a cross. Hold the trimmer at the corner and transfer the mark to the corner piece, then run the trimmer line carefully to the lower corner of the piece, this is the line you will trim the skirting board along.
  • Cut the necessary angle with a hacksaw or office knife.
  • Apply the plank to the right of the corner. Draw a trimmer line along the ceiling along the baseboard farther from the corner.
  • Apply the baseboard to the left of the corner. Draw the trimmer line along the batten to the mark where it intersects with the first line.
  • Mark two marks on the plank: the first. the intersection of lines on the ceiling, the second. the place where the corner of the room passes. Connect the two marks. you will get a line for the baseboard trimmer. Now all that’s left is to cut the corner and, if necessary, correct the gaps.

Trimming the corner with a false chisel

The third way to trim the corner of the baseboard is not quite usual. using a kind of false fishing rod. You can make such a “tool” in two ways.

The first is to draw a jig. To do this, you can use plain heavy paper or cardboard: draw two parallel lines on the sheet and, using a protractor or simple angle piece, mark off the angles with the required degree. The corner is cut in much the same way as in the case of the carpentry jigsaw: hold the skirting board against the “tool”, make the necessary marks and make the notch on them.

The second method is to make a prototype of a crosscut out of three wooden boards: align them in the shape of an oblong letter “U” and make notches in 45 and 90 degrees. The same protractor can be used to mark corners.

A wood plank chisel

When cutting the corners of the baseboard without a plank notch, it is very important not to miscalculate the length of the plank and the degree of notch itself. In order not to make a mistake at first it is better to cut blanks 10 cm longer, then try them on dry to the ceiling and only after that adjust until you get the desired result. In addition, let’s not forget that not all bathrooms have ideal angles of 90 degrees. without adjusting products still can not do.

Tip. Fix the plinth trim to the ceiling only after you fit the corner of the next baseboard blank to it. Cuts are better to try on not under the ceiling itself, but on the table. it will take more time, but the cut lines will be more accurate.

Thus, we have several ways of trimming ceiling plinth: with a joiner’s chisel, without a chisel, using a kind of false chisel. Whatever variant of execution of the corners you have not chosen, it is important to do everything in a precise and accurate manner. only then will you get a really effective tool for the final design of the ceiling, thereby making the interior of your bathroom aesthetically complete.

ceiling, plinth, outer, corner