How To Cut A Ceiling Plinth

Forming outer corners

Cutting steps for outside corner:

  • In this case, you should also attach the product to the edge of the wall, but so that it goes slightly beyond its surface. Check mark.
  • Do the same operations as for trimming inner corners.
  • Now you need to try on and, if necessary, process the edges of the strips with a knife or a file.

The use of a miter box is relevant only when the walls, adjoining each other, form a perfectly even angle of 90 °. Otherwise, if there are irregularities, the deviation of the angle will be 2 ° or more. Then you will have to do with other ways of trimming the baseboards.

Decorative corners

In this case, you do not have to think about how to cut the planks at the desired angle. After all, even if the joint turns out to be uneven, then such a defect will be reliably hidden from the eyes by an already finished corner element.

Manufacturing material

Before touching on the ways to saw down the ceiling plinth in the corners, let’s get to know what, in fact, such details are made of. Currently, various materials are used for the manufacture of modern planks:

  • Styrofoam;
  • Expanded polystyrene;
  • Polyurethane;
  • Wood.

Such products are quite widespread throughout the world. They have a different profile and pattern, due to which you can choose the best option to your liking for the interior of the room.


How to properly file corners on polyurethane skirting boards? Today, such planks are the most expensive. But they fully justify their high cost. Moisture resistance, high degree of strength and density, elasticity. All this is polyurethane.

How To Cut A Ceiling Plinth

If the skirting board is located on the ceiling above the slab, it can crack or even deform. This suggests that the material is quite sensitive to temperature changes. For processing such products, you should use a special knife.

Trimming inner corners

First of all, you should tackle the inner corners, and only then move on to the outer ones. Otherwise, it may turn out that the length of the purchased slats will not be enough. The procedure for forming the inner corners will be as follows:

  • The prepared strip should be applied to the ceiling surface and the required length should be measured.
  • Then the element is placed in the tray in the same way as it should be placed on the ceiling. The bar must be pressed with the left hand against the far wall of the device and held in this position.
  • The blade of the cutting tool must be facing the workpiece at an angle of 45 °.
  • Without strong pressure, the bar is neatly cut, otherwise unwanted deformation cannot be avoided.

How can I file a skirting board (mirrored only) with a different plank? Carry out the same manipulations.

After both products are trimmed, it is worth checking how correctly the processing was performed.

To do this, simply attach both planks to each other on the ceiling in the order they will be located. In the case of using wooden skirting boards, they must be additionally processed with a file.

Styrofoam fillets

These are the cheapest ceiling skirting boards, which at the same time are fragile, soft and brittle due to the nature of the material. Even lightly squeezing the baseboard with your fingers, you can leave dents on it. In addition, it is almost impossible to avoid creases and other defects.

How to cut down a 45 degree ceiling plinth? It is extremely difficult to make a beautiful and even corner on such products. If the home craftsman has too little experience with such material, then a large number of purchased planks can simply be destroyed and sent to the scrap.

In addition, the polymer is highly electrostatic. This means that such skirting boards will collect dust on their surface. To cut them, it is better to use a hacksaw or a sharp construction knife.

How to glue a ceiling plinth


Ceiling plinth (fillet). Type of cornice, which is used to decorate the joints of walls and ceilings. The ceiling plinth is convex and concave, it can be of different widths and with different patterns.


Attention! It is better to buy a ceiling plinth with a margin for each corner (5-10 cm on each side).

Measure the length and width of the ceiling with a tape measure, calculate the perimeter of the room.

Divide the obtained value by the length of the plinth (2 m. Standard).


Attention! It is recommended to start glueing the ceiling plinth from the corner and the wall opposite the front door, since this method will avoid errors.

Place the baseboard around the perimeter of the room while on the floor. Along the short walls, lay one whole piece of plinth and a part of it, and two whole plinths will be glued along the long walls, and the remaining cut pieces between them.

Attention! Try to keep the factory edges of the baseboard as much as possible. They connect perfectly without leaving uneven joints.

The corner parts of the plinth must be measured and cut (by measuring the length of the wall as accurately as possible) by inserting a piece of the plinth into the miter box (a device for cutting corners at exactly 45 degrees).

Lay out all the skirting boards again on the floor, checking the correctness of the measurements.

If the “puzzle” comes together. Proceed with the installation.

Apply glue to the wrong side of the skirting board, for this:

Then apply glue to the next skirting board, starting from the already glued corner.

Continue the installation, joining all the following prepared pieces of the skirting board, in the planned order, pressing tightly against each other.


Rub the space between the skirting board and the wall, as well as the skirting board and the ceiling, around the entire perimeter of the ceiling skirting board, with a rubber trowel.

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Features of mounting a ceiling plinth for a stretch ceiling

When choosing a plinth, it should be borne in mind that it should be light so as not to damage the structure of the stretch ceiling.

It is necessary to glue the skirting board with its wide side to the wall using a polyethylene lining, which is attached between the skirting board and the stretch ceiling. After installation, the polyethylene should be carefully removed.

How to glue foam ceiling skirting boards

To glue foam baguettes on a stretch ceiling, you can use the following tools:

  1. Liquid Nails. From this line, the universal glue Moment or specialized for expanded polystyrene. INSTALLATION express decor is suitable. This is a white water-resistant composition, intended for decorative friezes, safe for humans and will not damage the foam. You need a dispensing gun to work.
  2. Polymer glue. Eco-set, Titan, Master, Elitance. Special agent for gluing expanded polystyrene products. It is a transparent water-based composition. It is cheaper, but the setting time is longer, you have to press the baguettes against the wall for 5-10 seconds. The workflow is lengthening.
  3. PVA. The glue is safe and can be easily removed with a damp cloth. The disadvantages include high consumption and a long setting time. About 3 minutes.
  4. Acrylic putty. Uniprof, MasterTeks HM. Water-resistant solvent-free adhesive based on acrylic dispersion. Suitable for all decorative polystyrene and polyurethane products. Features a high drying rate.

The composition for gluing baguettes can be made by hand. To do this, it is necessary to mix in a ratio of 4 to 1 the finishing putty and PVA glue, gradually adding water until the consistency of sour cream is obtained. When the solution becomes homogeneous, let stand for 10 minutes, stir again and start working.

Styrofoam skirting boards

Due to its wide range and ease of installation, this is the most popular type of fillets. Foam skirting boards are made from expanded polystyrene. The surface of the molding can be flat or voluminous with various patterns that imitate stucco molding. A wide variety of models allows you to decorate a room in any style. Borders are sold white, but can be easily painted if desired.

  • Lightness. Securely fastened, in case of an accidental fall, they will not harm anyone;
  • Durability. Can last 15-20 years;
  • Low water and vapor absorption (3%). Can be used in bathrooms;
  • Easy care with a vacuum cleaner or liquid detergents;
  • Low price. The cheapest of the ceiling curbs: 13-20 rubles / piece.
  • Instability in relation to solvents and materials based on them;
  • Fragility and inability to bend. Even walls are required, otherwise the mount will turn out to be unreliable;
  • Low heat resistance. Should not be located close to lamps;
  • Emits styrene when burning;
  • Turns yellow when exposed to direct sunlight.

How to properly glue the ceiling plinth to the stretch ceiling: step by step instructions

When installing a stretch ceiling, a technological gap remains between the curtain and the wall. You can close the gap with a special decorative insert or ceiling plinth. It is also called a fillet, molding, frieze, baguette, curb or interior cornice. But not every skirting board is suitable for this type of finish. The installation technology also differs, since, unlike conventional painted ceilings, the tension structure does not form a solid surface. In order to securely attach the frieze and not spoil the coating, it is important to know the specifics of the process. Let’s consider in detail the pros and cons of various types of skirting boards, the necessary tools and adhesives, as well as the order of work.

Plastic curtain rods

Plastic skirting boards are constructively executed with a groove-lock and are intended for a harpoon system for fastening a tension cloth. The molding is simply inserted into the recess of the profile without the use of glue, which significantly speeds up installation. Additional add-on elements for inner and outer corners eliminate the need for filing for joining.

  • Quick and easy installation due to the presence of a special latch;
  • No finishing is required in the form of painting fillets and putty joints;
  • Absolute moisture resistance of the material and easy maintenance;
  • The greatest durability and strength.
  • Limited use. Suitable exclusively for the harpoon mounting system;
  • Lack of variety. Only one white model is available;
  • The need to level the walls. The plastic skirting board will not hide the unevenness.

Fillets are also produced from MDF, wood and plaster. Their installation is difficult and requires additional fastening. The heaviness of the products makes such baguettes dangerous and incompatible with a stretch ceiling.

Styrofoam or polyurethane eaves are the most suitable type of ceiling molding. Consumer qualities allow such fillets to be used for a long time.

Since the skirting board is attached only to the wall, you should choose baguettes with a wide vertical part of the profile section, this will increase the adhesion of the polymer to the surface. For reliable fixation, the glue strip must be continuous and completely cover the part in width.

Which skirting board is better to glue on stretch ceilings

Various materials are used to make decorative baguettes. The most common are polymer eaves. Consider their varieties and characteristics in order to choose the right product.

Polyurethane cornices

Such moldings are denser and more durable compared to foam. Polyurethane curtain rods are made from a polymer that does not contain poisonous styrene. The surface can be flat, with decorative elements or a relief pattern. Stucco models look like plaster, but are much cheaper. In contrast to the delicate foam, polyurethane is resistant to mechanical stress. Baguettes are easy to clean and can be painted with acrylic paints in any color.

  • Strong, reliable and durable type of molding;
  • Flexible models hide the unevenness of the walls well, ideal for finishing columns and bay windows;
  • The material is resistant to high and low temperatures;
  • Dense structure ensures ease of maintenance, polyurethane does not absorb odors, which makes it ideal for the kitchen.
  • High price. At least twice as expensive as foam: from 42 rubles / piece;
  • heavy, special glue is required, and large fillets are additionally fastened with self-tapping screws;
  • You will need a miter saw to cut hard baseboards;
  • glue consumption.

Making corners using a miter box

If the walls and corners of the room are even, you can use a miter box for work. In order to properly cut the corner, the part in which the person will make a gash should be laid inside the miter box, then insert the saw into the guides. This holds the part in place and can be cut at the desired angle. For high-quality cutting of the skirting board, it must simultaneously adhere to both surfaces, therefore it should be pressed against the wall of the miter box. The ceiling plinth is pressed with the side that is closer to you.

With a miter box, you will need to cut a 45 degree angle. First you need to decide how to position the plinth in the miter box. To avoid confusion and cut correctly, place the right plank on the right and the left plank on the left.

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Follow the instructions below:

  • Press the part of the miter box that will be on the ceiling to the bottom of the miter box. The other side will be lifted up and closer to you. It can be resting on the wall of the tool, and then it will not stagger when cutting.
  • Determine the cutting direction as shown in this illustration, and then cut the corner.
  • Fold the cut pieces together. You have an inside or outside corner.

Place it on the ceiling and check the geometry. If it is not even enough, it can be slightly corrected with a knife, and in the case of minor defects and wide gaps, you can use a putty.

How to make an even corner: ways

The most difficult thing is to cut the corner so as to get perfectly even: the surface of the materials used is not easy to cut, in addition, you need to observe good joining, preferably without huge gaps. How to make a corner on a skirting board? You can use several ways: with a miter box, without a miter box, using decorative corners, as well as an alternative way.

Important points on how to cut ceiling plinth in corners

Let’s consider how to correctly cut the corners of the ceiling plinth and get an excellent result the first time. Follow a few helpful tips:

  • Before fastening, both parts must be matched to each other. Attach both halves to each other. The surface of the wall must be dry. Finding defects, you can easily level them with a knife.
  • Several trims may be required. Don’t be discouraged if it takes a long time and has to make a few trims, especially if this is your first time doing the job.
  • Determine the correct length of the planks in the corners. For the inner corner, the length of the plank must be adjusted exactly from corner to corner; on the outer corner, the measurement is taken from the inner point in the direction of the room.
  • If the corners generally match perfectly, but there are small gaps in the middle, they can be repaired with a putty.

Using fillets

You can not make fillets yourself, but immediately purchase those that were initially prepared for docking. This is how they produce polystyrene fillets, which do not need to be adjusted to each other.

The baguette that will be fixed to the left must have a right cut, and the right baguette must have a left cut. When creating the inner corner, make the bottom section rise above the top, for the outer corner everything should be the other way around.

Attach the baguettes to each other, if necessary, make undercuts at the joints of the base. If everything is in order, the skirting boards can be fixed with glue or screwed to the walls with further sealing of the seams.

How to cut skirting boards using decorative corners

With the help of them you can easily and quickly obtain the desired corners in polystyrene or polyurethane skirting boards. Install them on the ceiling, and then glue the strips to them. Cutting them is easy using a clerical knife.

How to join skirting boards in the corners

When a certain part of the skirting board is glued and a small distance remains to the corner, so as not to be mistaken with the length, it is necessary to leave a margin. To begin with, you can cut off a piece that will be 10-15 cm longer. Then cut the corner in a convenient way, try it on a dry surface, attach the plank to the ceiling and highlight the place to which it needs to be shortened. Undercutting is performed at an angle of 90 °.

Next, you need to correctly join the corners. The made ceiling moldings are attached at an angle of 38-45 °, so the classic 45 ° is not always suitable at the joints. In various cases, the cut edges do not join and leave gaps. For this reason, after the initial trimming of corners, it is necessary to carry out a “dry” and the most accurate joining of the baguettes directly to the ceiling. Especially you have to tinker with wood and plastic materials.

How to properly cut a ceiling plinth using parallel lines

Even if there is no corner of the curve, there is no miter box, and you don’t really want to do the mink, then in this case there is also an effective and reliable way to cut the ceiling plinth. Place the plinth on the installation site, make a mark on the dimensions of the plank on the ceiling and wall. Do the same around the perimeter of the room, from all sides.

To correctly align the corners, transfer the dimensions of the plinth to the wall and ceiling, draw parallel mowing lines along the marks

Draw parallel mowing lines along the marks, at the corners they will intersect and form rectangles. The intersection on the ceiling is the upper cut mark, on the wall is the lower one. Attach the plinth again, and transfer the marks to it, connect the points with a straight line, this will be the cut angle.

Transfer the points of intersection of the lines to the plinth, connect them exactly along the mowing line, cut

Method “Oh! Lucky! ” We cut the plinth with a miter box

Before cutting the corner of the ceiling plinth, measure the corners of the room with a building corner, if they are straight, then you can cut the corners so that they fit tightly, without a gap, in the corner using a miter box.

A miter box for cutting ceiling plinths is a simple carpentry device for cutting, consisting of a tray with a rim to hold the plank in one position, and with grooves that guide the blade of the cutting tool at the desired angle: 45, 60 and 90º.

In order not to get confused in the sides of the plank and there is no question of how to cut the corner of the ceiling plinth, attach the plank at the installation site. Mentally fix the position of the plinth, and without turning it over, install it on the miter box. The part that will be glued to the wall should rest against the side. If you applied the plinth on the left, then you need to cut from the left end, and, accordingly, vice versa.

Photo instruction on how to cut the corner of the ceiling plinth, internal pairing

If the baseboard is made of polystyrene or loose polystyrene, then it is better to cut it off with a sharp knife, you can use a clerical one, more rigid materials: polyurethane, dense polystyrene, PVC, it is recommended to cut it with a hacksaw for metal with small teeth.

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External corner, photo how to properly cut the ceiling plinth

The cut ends, for a snug fit to each other, must be processed with a file or sandpaper, after which the profile can be installed in place. To catch all the nuances of installation, be sure to watch the on how to cut the ceiling plinth. The instructions show how and where to apply the profile in order to make the correct cut.

Buying a miter box for cutting at once is completely impractical, so you can make the device yourself. To do this, you will need a base part of a rectangular shape, made of plywood or chipboard, for the sides. Bars, all elements are aligned, the bars are installed at the edges, their parallelism is checked, the parts are fixed on self-tapping screws. Next, the angles are marked along the protractor, an angle of 45º can be measured using a square sheet folded diagonally.

Before you saw down the ceiling plinth, check the corners, if they are 90g, use a miter box

About corners

Installation of skirting boards is one of the final stages of the repair, it is very important to perform the installation carefully, without gaps, and the most difficult thing in this process is to join and fit the planks in the corners. If the surfaces are perfectly leveled, then it is not difficult to connect the skirting boards, it is enough to saw down the ends at an angle of 45º, and then fix them in place. But in most cases, the geometry of the premises, to put it mildly, leaves much to be desired, sometimes instead of an angle of 90º, in practice the walls adjoin each other and with an angle of 87º and 93º, and even the ceiling has gone up or collapsed. Under these conditions, cutting and joining the skirting boards at the corners turns into an exciting activity full of puzzles that requires extraordinary ingenuity and patience. Next, we will tell you how many ways how to cut the plinth in the corner and evenly join the planks.

How and how to cut the corners of the ceiling plinth and floor?

Installation of skirting boards is the final stage of renovation. Neatly installed ceiling and floor strips transform the space, giving the interior a finished look. But if gluing skirting boards on straight surfaces does not cause any serious difficulties, then joining and cutting skirting boards at an angle sometimes turns into serious tests.

In the article, we will present several ways how to cut the plinth in the corners, how to properly join the planks, how to cut and join the corner pieces of narrow and wide, curly profiles. And we will also tell you how to cover up the joints, what tools will be required for installation, and what tricks exist to correctly bring the outer and inner corners together. Also see the master classes, which show in detail how to cut and make the connection of corners in skirting boards from different materials.

There are several options for how to cut the corners of the skirting board, the traditional way is to wash down the corners by 45g

How to cut the corners of a skirting board

As for the question of how to cut a corner in floor skirting boards, the methods of measuring, cutting and joining corner elements on the floor are no different from the installation of ceiling profiles. The only difference is that when cutting on a miter box, the side that will rest on the flooring should adjoin the side, and the leg that will be adjacent to the wall should lie on the base of the device.

Another difference in the installation and cutting of floor and ceiling skirting boards is the shape of the fillets. So the ceiling molding often has an almost isosceles right-angled triangle in the base cut, sometimes one of the legs is slightly smaller, but this difference is not significant. But floor profiles, especially wide ones, on the contrary, have a small base leg resting on the floor and an elongated leg resting on the wall. The floor plinth on the lower leg, as a rule, is no more than 23 mm, and they differ greatly in height, from 25 to 300 mm, sometimes higher.

Cutting and sealing of the outer corner of the floor plinth is identical to the fitting of the ceiling fillets

Some stylish interiors require the installation of high profiles, and in such cases, cutting the inner corner in the traditional way is not relevant. To cut and join a high and narrow profile, saw the first plank at right angles and lock it in place. Next, you need to cut off a piece of the baseboard at a right angle. The second plinth, which will dock perpendicular to the first, should be laid flat, then a prepared piece should be placed on the edge with its end, and carefully outline it along the contour. The resulting drawing must be cut out, exactly along the mowing line, and then cleaned the butt with sandpaper. The skirting board cut in this way will exactly follow the contours of the already fixed profile, and will fit tightly into place.

A way to properly saw and join a high but narrow plinth

We only dream about peace, or how to make the corner of the ceiling plinth if the walls are blown apart

Before cutting the corners of the ceiling plinth, measure the mAL-KO

When the bevel is made, measure the angle by pushing the slats apart, both parts should rest against the walls, fix the position by tightening the tie bolt more tightly. Then attach the bevel to a thick piece of cardboard, outline the outer contours of the corner, and cut out the paper template. Fold the resulting shape in half, connecting the edges evenly, so you find the middle of the corner. Further, for convenience, transfer the template to MDF, plywood, HDF, do not forget to mark the middle, carefully cut out a new template along the contour, along which the inner corners will be cut. To grind the outer corners, you need to cut out your template, for this, the mAL-KOy corner is “wrapped around”, the internal parameters are transferred to the template.

First, the plinth is applied on one side of the template, the marks are transferred to the strip, connected by a line along which the cut is made, then the second plinth is measured and cut in the same way, the ends are abraded and glued in place.