How to cut a corner on the baseboard

How to make the angle on the baseboard more or less than 90 °

Not all corners have exactly 90 degrees. If the deviation is small, the gaps can be removed with sandpaper. In other cases, you will have to mark and cut in view of the actual degree. The main task in this case is to find the point on the floor where the two baseboards will join.

Let’s begin by explaining how to properly trim the outside corner if it is not 90 degrees. We take the bar, put it to the corner on one side, press it firmly against the wall as it should stand. Along the bottom edge of the baseboard with a pencil draw a line on the floor. Apply the plank to the other side of the corner, do the same. The intersection of the two lines and will be the junction point of the two baseboards.

How to dock the baseboard if the angle is less or more than 90 degrees

Now, we again attach the skirting board, aligning it as it will be fastened. Make two marks: at the top at the curve itself, at the bottom where the straight lines we’ve drawn intersect. Now the important task: it is necessary to make a saw cut on these marks. If you have a coping saw or a saw with adjustable tilt saw, set it and cut. If not, we carefully cut it with a hacksaw. To keep you on track, you can pencil in the fishing line you want to saw on. Similarly mark and cut off the second part. Finish the connection of baseboards with sandpaper.

Few professionals process the joints with sandpaper it is time and additional labor. But if you dock the baseboards in the corners of your own house, with your own hands, you just want everything to be beautiful. That’s what this manual finish is for.

With the inner corner of non-standard size, everything is exactly the same. We put the baseboard in the corner, draw a straight line on the floor. Do it on the other side. The intersection point is transferred to the strips.

How To Cut Perfect Baseboard Inside Corners

Tips and recommendations

There is a situation where you need to make repairs very quickly, but time, unfortunately, is not very much. In such a situation, you can use the method of orientation on the ground, but it must be competent to the joint was ideal.

Take a protractor and measure the corners of the room. It is a good situation if the angle is 90 degrees or 45. Unfortunately, this is not always the case. If the angle is correct, then a jig is used. If not, then the marking goes on the spot. When marking on the spot is often the case that even after treatment with a knife corner is not a perfect match.

In this situation, you need to cut off a piece of the first skirting board, which can cover the gap formed, cut it off so that the angle was perfect. This strip, inserted into the gap and neatly closes it. And also this method will help round the corner of the baseboard, which is often needed in repairs.

Ceiling skirting boards can be glued without professional help. The main thing is to know how to cut corners, as well as the right tools and glue. The choice of the latter will depend on the material of the decorative element, since not every adhesive can be used.

Styrofoam and polystyrene

The most affordable and practical are polystyrene and Styrofoam ceiling skirting boards. Even a beginner can glue such decorative elements. They are light in weight, so they can be fixed with any glue.

Their only disadvantage is fragility, so cut corners, as well as cut the strips themselves, must be very carefully. The adhesive should be applied to the back side. Experienced repairmen note that such skirting boards are easier to sit on acrylic putty, and for sealing the joints between the ceiling and the strips you can use gypsum putty with the addition of PVA glue. A white sealant will make the joints almost invisible.

Tip! For skirting boards made of foam and polystyrene, acrylic liquid nails are suitable. They are safe and do not damage the fragile texture of the material.

Plastic and polyurethane

Polyurethane and plastic ceiling skirting boards are resistant to wear and tear and temperature fluctuations. They are also flexible, so they can be glued in curves, in corners, in recesses of different sizes, to combine with suspended ceilings.

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When choosing a glue should take into account that such skirting boards over time give the shrinkage. Therefore, any gaps should be caulked with silicone sealant and close all joints tightly. And so, for such decorative elements suitable glue “Moment”, “Titan” and liquid neopropylene nails.

Also during gluing, all the ends should be coated with special compounds. Connecting the strips, corners, internal and external, which are provided in a set of plastic skirting boards to sit on the adhesive composition with a high degree of adhesion.

If the walls are uneven, then in such a situation it is better to use acrylic putty. Work with it is difficult, but it will remove all the errors and visually improve the joints between the slats.

Wood or gypsum

Wooden and plaster baseboards. a great choice to emphasize the classic interior, most importantly, do not use them in rooms with high levels of humidity.

The choice of glue depends on the weight of the planks. If the skirting boards are light, you can sit on the liquid nails, but the heavy is better mounted with self-tapping screws.

By the way, plaster baseboards are considered the most durable and long-lasting, and if you buy a dry composition and a mold for the molding, then such a decorative element can be made with your own hands. Experts advise to fix plaster skirting boards on a mixture of PVA and alabaster, but if the strips are massive, then the liquid nails.

To mount the moldings, you can make a homemade adhesive. Simply mix one part of PVA and four parts of dry putty. Dilute the mixture with water to the consistency of thick sour cream and leave it for 15 minutes. Such a composition can be used for two hours.

What to do if gaps remain?

If the defects are detected after the completion of the work, then few people will like the prospect of redoing it. In this case it is easier to mask them with one of the compounds. The best option for such processing will be the final acrylic putty. It has a white color and is very plastic. Material is taken with the fingers, then it is pressed into the remaining gap, gently distributing in the hole, smoothing. The remaining compound is removed with a damp cloth. As a rule, traces of imperfections in the joints do not remain.

How to cut a ceiling plinth? Must be equipped with the necessary tools and patience, as the rush always provokes errors. The main thing in this case. the choice of the optimal method. But care and accuracy are no less important: the skirting boards are not made of a very strong material (except for wooden baguettes). They are fragile, so do not use excessive force with these products.

How to Mitre Baseboard Trim Perfectly

How to cut a ceiling plinth in the corners, using a wire cutter

This tool is a U-shaped flute. There are several slots in its sides for the blade. They are positioned so that the blade can be set at a given degree. The device is easy to find at the construction market and in stores. To build it yourself you will need a U-shaped profile of a suitable width, or an oblong box.

In the middle of the workpiece, draw a square and make furrows in the sides all the way to the bottom. Putting the saw into the furrows farthest away from each other, we get the necessary 45 degrees. The sides must not bend or wobble while cutting, otherwise the blade will get stuck in them and the cut will be uneven. You can work only with products made of solid materials that hold their shape well. Make sure that the product is absolutely reliable and that its sides will not fall off at the most critical moment. When there is a sharp object in your hand, you can get injured.

Inside joint

Before you glue the ceiling plinth and cut the corner, it is attached to the place of installation. This is necessary not only to check how even the base is. This way it’s easier to see what position the piece will be in, and it’s easier to get it right in the jigsaw. Let’s imagine that the bottom is the ceiling. Let’s put a rail in it. Turn the tool towards you with the open side, from which the main part of the baguette intended for installation looks out. Now press the baguette with its perpendicular back edges to the bottom and left wall. Insert the saw into the holes, so that the handle is on the left and is closer to us. When working, do not press on the handle, otherwise the edges will be dented. The canvas should move smoothly, trying to avoid burrs and chips.

If the holes in the sidewalls are too wide, you have to watch out for misalignments of the saw. When making the jig, it is desirable to take into account the thickness of the blade. It should cut easily and freely. The gap with the walls is necessary, but it is better to reduce it to a minimum. this will simplify the task and help avoid mistakes.

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One of the most critical moments. the final stage, when the saw cut is almost to the end. Fix the dangling part of the workpiece in your hand. Plastic and styrofoam often kinks under its own weight, creating dents. The wood can crack along the fibers. The bottom of the front usually suffers. Dents can not be fixed. The solid will not be difficult to glue back in place of the torn off piece. It will need to be cut off and fastened to where it came off. You can use PVA glue, Moment, any other compound. Press the piece tightly against the smeared surface. Carefully remove excess glue with a cloth or tissue paper.

The second slat is a mirror image of the first, so it is attached to the right side of the jigsaw. In the rest, the technology does not differ from the manufacture of the first plank. It is cut at the same angle, but from the other sidewall.

The outer joint

In this case, the parts are fixed as well. To saw the batten, pressed to the left sidewall, the saw is inserted from the side of the right.

In the case where the rail is an integral part of the outer and inner joint, first formalize the inner. Then the slat is applied to the place of installation to make a marking for the outer. Doing it all at once is very risky. You can cut off the excess, and then the length of the prefabricated element will not be enough. It will leave a noticeable gap. It is easier and faster to perform actions in the correct sequence.Step by step instructions on how to cut the corner of the ceiling plinth with his hands, watch the video.

corner, baseboard

How to evenly cut the corner of the ceiling plinth

Beautiful and neat ceiling edging hides the joints between the coatings and is an additional element of decor of the room. But in order for the ceiling plinth to look really beautiful, you need to know how to dock its corner joints qualitatively. How to evenly cut the corners of the ceiling plinth, you can learn from our article. Article on the subject: how to glue the ceiling plinth on the glue and putty.


Ceiling skirting board. it is part of the design of the living space, through which cover up the defects in the finishing in the area of the junction of the wall with the ceiling. Used most often when pasting one of the surfaces adjacent to each other with wallpaper, but there are variants of design solutions with skirting, when the walls and ceiling painted.

Ceiling moldings have two key functions:

  • Decorative. Among the abundance of varieties of skirting boards you can always find an option when the baguette becomes an independent component of wall decoration, a kind of “spice”, giving them a fashionable and often original look.
  • Aesthetic. When pasting the walls or the ceiling, sometimes it is not possible to make a beautiful line of mating with the adjoining surface. Tutel and creates a transition from the wall to the ceiling completed: attractive and elegant.

Step-by-step instructions

When installing a ceiling plinth first of all you need to prepare the surface before gluing the plinth, it must be cleaned of small irregularities, then it is necessary to primer the gluing places to create maximum adhesion between the adhesive and the wall or ceiling. The primer is the same as you put on the wallpaper or ceiling tiles.

Before gluing it is recommended to take a small piece of baguette and practice cutting corners so as not to spoil unnecessary.

So you’re all set and it’s time to start cutting corners. To create an interior corner, the first of the above methods will work great for you. If you have flat walls, you can cut equal pieces from the baguettes, and from them cut corner joints, then simply glued neatly at the stop to them long strips. These manipulations will ease your work when trimming and prevent the baguette from bending or breaking.

If the walls have imperfections, and you are worried that the place of gluing will then be visible, you can adjust the corner on the floor, and then glue.

When cutting an outside corner, remember that the inside corner is against the wall and the outside corner is, on the contrary, protruding over the wall. By analogy with the method described in the first method, you can try. The only difference will be that the output of the baseboard outside the wall is needed to the width of your baguette trim. Having trimmed the boards at the right angle and joined them, you may need to correct the angle manually, since the corners of our houses are often not close to 90 degrees. The rest of the methods we describe will allow you to make the outer corner more easily. Just like when cutting an inside corner, it is better to practice first. this will make your work easier, and reduce the waste of the baseboard.

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Before gluing the skirting boards, you need to make sure that the exact fit of the joints. Modern mounting adhesives seize very quickly, so the time to fix a mistake you almost will not have, and tearing off the baseboard. and the possibility of breaking it, and the need to re-scratch the surface of the baseboard and the wall from the glue. Excess glue is better to remove immediately with a small clean rag or sponge, so that no traces are left.

With proper patience and proper fitting you can achieve a “seamless” connection and your baguette will look solid, which will simplify your further painting and eliminate the need to use finishing putty to smooth out the connecting seams.

Cutting Features

Consider in more detail how to properly cut a corner on the ceiling plinth with the help of a jigsaw, using different materials.


Polyurethane foam (in common parlance. just polyurethane) is a very good material for ceiling skirting boards. Because of its good flexibility, it fits exactly to the substrate (the joint between the wall and the ceiling), even if the walls and ceiling are uneven due to construction errors. In addition, polyurethane is well washable, and therefore can last a long time. Low load resistance is not a problem here: there is almost no load on the ceiling plinth. We also have a separate article, which in detail deals with how to make your own ceiling from drywall and false ceilings from gypsum board.

Cut the polyurethane skirting board with a wire cutter as follows:

What??? Pros Cut Baseboard Upside-down and Vertical Why?

  • Measure the wall and ceiling at the junction.
  • Select a suitable template on the cutting jig.


Styrofoam is also often found as an element of decorative design of rooms. Its characteristic feature. high fragility, so it must be fitted in place extremely accurately, no deformations foam does not tolerate.

Cut it with a wire cutter should be as follows:

  • The baseboard plates are inserted in the joiner.
  • The cut is made. Unlike polyurethane foam is a soft material and it can be cut even with a knife or better. with a stationery or a construction cutter. Here it is better to use a small but straight piece of wood, a metal plate or a ruler. In the extreme case you can make pencil marks corresponding to the cuts of the jigsaw, connect them with a ruler. and lead the cut.

Asterisk IMPORTANT: Styrofoam is a fragile material, so the cutting tool should be sharpened as best as possible.


Polystyrene has the same properties as Styrofoam. Therefore, polystyrene skirting boards are cut in the same way as Styrofoam. The main thing here is to sharpen the cutting edge of the tool as sharply as possible in order to avoid breaking it off. There’s no need to sand down the ends: the edges are usually fluted enough as it is to ensure good adhesion of the glue.


Wooden skirting boards are rare and expensive, so they must be finished responsibly. The cutting technology looks something like this:

  • The end to be cut is fixed in the jigsaw.
  • Sawing is performed. It can be done with an ordinary wood hacksaw, but it is better to use a special saw or metal file in order to avoid too wide a cut.

Asterisk IMPORTANT: when trimming you must be extremely careful, it is better to cover an uneven cut with a decorative overlay or wood filler than to remove a too large mass of wood.

Plastic (polyvinyl chloride, PVC) skirting boards are widespread nowadays. It is convenient because:

  • Easy to cut with any tool.
  • It is flexible, so it can even be used in rough corners.
  • It usually has an inner cavity and thus can be used as a conduit for electrical wiring or fiber-optic lines for the Internet.
corner, baseboard

Cut PVC skirting boards the same way you cut polyurethane. However, you must take into account: the best tool, a hacksaw for metal with fine teeth, is suitable only for thick baseboards, in thin ones it can tear out pieces. Therefore, the best option for thin products is a stationery or construction cutter or a sharply honed knife. Its use requires a certain skill, so it is better to practice in advance on scraps or sheets of thin plastic.

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