How to cut corners on a ceiling plinth

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

Every repair requires attention to the smallest detail. The quality of finish depends on the appearance and general perception of the room. To a greater extent, this applies to 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 the utmost accuracy. Therefore, many owners who are planning, or have already begun repairs, 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 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. Foam is easily scratched, damaged by accidental impact. Advantages. 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 plinth can crumble, so it will be unsuitable for installation. This is true for both angular and straight cuts.


This contender is more expensive, but it does not differ much from the first candidate, because it is a “relative” of Styrofoam: it is made from expanded polystyrene. This material also consists of small granule bubbles, but they are closer to each other denser. But also polystyrene foam will not tolerate not too sharp blade, it also will crumble. Therefore, the master must prepare not less than a sharp instrument.

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

corners, ceiling, plinth

Extruded polystyrene foam

EPPS is made from the same raw materials as conventional polystyrene foam, but in this case uses a different, more sophisticated technology. The usual 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 the same pressure, and then in the raw material is added foaming agent. 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 tools are not required to cut it, but bluntness of the cutting edge is also not welcomed.

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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 they use special, ready-made corners for their docking.

In general, these baguettes can be cut with a box cutter, 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 is characterized by 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 baseboards do not crumble, do not deform, and honorably 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 work with sandpaper or a file. Since such products are more expensive than other baseboards, care is required when working. You can make a serious mistake easily, but you can not fix it. The consequence of carelessness will be the purchase of a new baguette.

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

Chisel for baseboards: basic rules for use

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

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

Chisel. a convenient tool for fast processing of blanks

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

The second way. without additional tools

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

As a result, you will get an even angle of 45 degrees, if you draw a trimmer line from the point of intersection to the edge of the part. This method of how to cut the baseboard is available to everyone, without having special tools.

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Other ways

With a good eye and hand accuracy, you can use a homemade template, which resembles an imitation of a jigsaw. To do this, take a thin board or thick plywood, and draw a layout in the form of a horizontal rectangle. Using a protractor, mark 45 degrees, on the right and left sides of the rectangle. Draw lines connecting the opposite edges. Now you can solve the problem of how to cut the ceiling plinth, using this layout. The actions are simple and similar to the description above in the first option. Only the ceiling parts should not be inserted, and impose on the drawing and align a hacksaw with the marking of the layout.

Special accessories for the junction Installing ceiling plinths, you can bypass the question of how to cut the corner of the side. In a situation where you do not want to cut anything, if you are a woman and like beauty, but not carpentry work, you can go the other way. Choose for your finishing skirting, to which you will find in the store, a matching pattern part, closing the joint. This method will save you time and effort.

Description of methods of gluing ceiling plinths (skirting boards) on the ceiling. The method of gluing with glue, putty and sealant. How to make even corners on the ceiling.

How to make a mortise for a ceiling plinth with his own hands

If such a useful tool as a chisel is missing, it can be replaced or made by hand.

In simple cases, for example, for cutting foam plastic, the role of the jigsaw is performed by regular cardboard or a sheet of heavy paper. On it set aside 2 parallel sections, and with the help of a protractor mark the planned places of the cut. Then simply attach a fragment of the product and cut, using cardboard as a template.

If the material is wide, hollow inside, or made of such a strong material as wood, it is impossible to do without a plane or its equivalent. Then proceed as follows.

  • A template is made on cardboard or heavy paper.
  • Then from any suitable material make corners for the ceiling plinth. from two slats, for example. The material is inserted into the element as in a jig.
  • Then the device is placed over the stencil so that the end of the skirting is over the drawing. Put the profile in the substitute for the jig and cut with a knife or saw at the mark.

In this case, the blade of the knife rests only on the homemade product, so you need to be careful when working.

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What is necessary to form an internal angle that is not equal to 90º

  • It is necessary to make a preliminary marking on the floor with a pencil. On both sides, the profiles are applied in turn and their boundaries are marked. Thus a rhombus is formed in the corner. Its diagonal will be the cutting line.
  • We put the slat to the obtained figure and put a diagonal mark.
  • Connect the mark and the corner of the baseboard. This angle will be the cutting line.
  • The side edge that you get should be painted the same color as the baseboard.
See also  How to properly cut corners on baguettes. Outer Angle

If the inner corner is cut with a small exaggeration, it will give an opportunity to make the most accurate fit. Sometimes a plug is inserted into the plastic or foam at the final stage in the joint and a nice, neat corner is obtained. In wooden products, the joints are simply neatly fitted, puttying is the destiny of the unskilled.

Method two. without additional tools

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

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

How to join in corners

If the installation of the first corner is passed, you 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 already glued and there is a small distance to the corner, how not to make a mistake with the length here? The answer is simple: leave a reserve.

You can cut a piece 10-15 cm longer at first, so that you can redo it a few times if you get stuck. Then you make a corner in the way described above, trying it on dry, all fit, that the result pleased you. Only after that, you can put the already cut bar in the corner and mark the place to which it can be shortened. Trim it exactly at 90 degrees. It is not necessary to use a jointer. Just try to put the knife (hacksaw) perpendicular to the surface.

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Finishing work

In the final phase of finishing the walls with baseboards are sealed gaps between the baseboard and the wall. For painted walls use acrylic putty for this purpose. For pasted. sealant. Leaks are removed immediately, before the mortar or sealant sets.

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