We make an arch of plasterboard with our own hands

This article is a detailed instruction on how to make an arch of plasterboard, without resorting to the help of professional builders and finishers. You can create such an arch in any room of your home - in the kitchen, living room or hallway. Such an architectural element will add to your home an individuality that will make its style unique.

Arch of plasterboard with your own hands - the project is quite real. If you use the right materials, tools and methods, you can build it literally in a couple of days off. However, if you have absolutely no experience, this project can be delayed for a week, but we guarantee that your efforts will in the end pay off. Before you start, carefully read our instructions, make a detailed plan of your actions and prepare everything you need.

How to make an arch of plasterboard in a doorway

To create an arch of plasterboard you will need the following:


  • drywall;
  • self-tapping screws for plasterboard;
  • metal profiles or wooden bars and plywood;
  • putty;
  • fiberglass mesh or paper tape.


  • roulette, carpentry corner, pencil;
  • screwdriver;
  • scissors for metal;
  • knife;
  • putty knife;
  • the trowel;
  • bucket;
  • protective gloves, goggles and respirator.

First, choose a place to create the arch. We will tell you how to make an arch of plasterboard in the doorway, you can build it almost anywhere in your home - everything is limited only by your imagination. Measure the size of the selected area.

A doorway in which we will build an arch.

Knowing the dimensions of the doorway or any other place where you will realize your idea, draw the desired arch on the sheet of drywall. Drawing the contour of the arch is a very important and important stage. If you do not give him the proper attention, it may turn out that all your subsequent hard work will be in vain. Screw a screw into the plasterboard and tie a rope to it - you will get a kind of compass with which you can easily draw a curve of the desired radius. Using a longer rope will increase the radius of the curve and, therefore, make it less steep. At this stage, you can make several attempts until you get a form that suits your tastes and needs.

After you have drawn the arch, you need to cut it using a jigsaw or a special hacksaw on the plasterboard. Make sure that you securely fasten the sheet, otherwise you may get injured or damage the material. The blade of the jigsaw must cut the gypsum cardboard exactly along the drawn line - the quality of the final result largely depends on the thoroughness of the operation.

  • See also: How and what to cut drywall and make holes in it

Tip: If you are going to install an arch in a place with high humidity, you should purchase a moisture-resistant plasterboard (green sheets), since it is designed for use under such conditions. Otherwise, your gipsokartonovaya arch with the passage of time will lose its appearance. You should think over all these details right at the beginning, when you are just wondering how to make an arch of plasterboard.

Cut out the arch of plasterboard
Cutting the arch from gypsum board.

Now you can start creating the arch framework. This is not as difficult as it might seem at first glance. For this, both metal profiles and wooden bars can be used. Each approach has its advantages: the metal profile is perfectly straight and very light material, but the wooden bars are more durable. We advise you to use metal profiles for brick walls and wooden bars for wooden walls.

Installation of a metal frame for an arch of plasterboard

Cut out the metal guide rails of the desired length and fasten them to the wall. You need to cut the two profiles along the width of the opening and fasten them to the top. Two profiles are also installed on both sides of the opening, but their size will depend on the radius of the previously cut arch from the gypsum board, see the photo below. If you fix a frame from a metal profile on a concrete wall, you must drill the holes with a drill, install the dowels, and then tighten the screws.

If you plan to mount metal profiles to wooden walls, use self-tapping screws with a length of at least 40-50 mm. The distance between the screws should be about 10-12 cm.

Profile fixing
Fastening the metal frame to the wall.

After fixing the metal profiles to the wall, you can continue the process by installing the first sheet of plasterboard. To perform this operation professionally, use an electric screwdriver with torque control. For gypsum board thickness of 12.5 mm we recommend you use self-tapping screws 3.5x35, and for plasterboard thickness of 9.5 mm, screws and smaller ones will do.

Fastening of plasterboard
Mounting the cut drywall to the metal frame.

Similarly, coat the plasterboard with the other side of the frame. Using a screwdriver, twist the screws so that their hats are flush with the surface of the drywall, otherwise you have to seal the grooves with putty.

Tip: To securely fix the plasterboard on the metal frame, screw in the screws every 15 cm.

Sheet fastening on the other side
Fastening the gypsum cardboard arch to the metal profile.

The next stage of work - fixing the curved metal profile along the edge of the gypsum plasterboard arch to increase the rigidity of the structure.

Measure the arc length and cut the corresponding section of the profile using metal scissors. Do not forget to use protective gloves to avoid cutting your hands on sharp metal edges.

Tip: To bend the metal profile, simply cut the side edges of it every 10-12 cm. These incisions allow the profile to be curved. If you need to bend the profile more strongly, just make more cuts.

Bending of the guide profile
Cutting of the walls of the metal profile to give it a curved shape.

Give the profile an arc shape and with the help of screws fix its ends in the lower parts of the metal frame.

Mounting the curved profile
Installation of curved metal profile.

After you make sure that both ends of the curved profile are securely attached to the metal frame, you can continue the process by screwing the gypsum cardboard walls of the arch to the curved metal guide.

This stage is very important for creating your arch, so be careful and make sure that the plasterboard is well fixed on the metal frame. To get a smooth surface, self-tapping screws must be screwed in every 10-15 cm.

Screw the curved profile
Fastening the plasterboard arch to the curved metal profile.

Remember that the frame is not completed until you install perpendicular sections of the profile, which must connect the side walls of the arch with each other. These connecting bridges should be placed in several points.

Installation of a wooden frame for an arch of plasterboard

Make a wooden frame for your gipsokartonovoy arch is also easy. The truth for this you still need plywood and wooden bars. Measure the width of the doorway, subtract the thickness of plasterboard and plywood, and you will get the thickness of the necessary wooden bars. Draw an arch arc on the plywood and cut it with a jig saw.

Frame for the arch
Frame for gypsum plasterboard arch from plywood and bolted to it bars.

Using 5-cm self-tapping screws, fix the wooden plywood on the plywood, which perform the function of the arch casing. Then fix the arch in the doorway with the help of long screws screwed in every 15 cm.

Gypsum board on a wooden frame
Drywall attached to the wooden frame.

The last step is the fastening of the second plywood wall and plasterboard plywood plasterboard. The latter should be fixed using self-tapping screws for drywall.

Installation of an arc-shaped fragment of an arch

After you have created the frame and installed the side walls of the arch, it is necessary to fix the lower arc-shaped section.

Using a tape measure the width and length of the arc. Using a knife and a square, cut out a piece of plasterboard in accordance with the dimensions obtained.

Now use the little trick that will help make drywall flexible. After every 10 cm, apply parallel incisions to one side of the gypsum plasterboard, cutting the paper layer with a knife. It is very important to use the building level or gon in this case, so that the incisions are perpendicular to the lateral edge of the sheet and parallel to each other. Be patient and take the time to avoid mistakes. Once again, we remind you of the need to observe security measures.

There is another way to bend drywall - just wet it. However, this method is suitable only for cases when it is only necessary to slightly bend the sheet.

  • More details about the methods of flexing the drywall: How to bend a drywall and a metal profile for it

Scoring plasterboard sheet
Cutting plasterboard for its subsequent bending.

Turn the plasterboard rectangle upside down and attach it to the bottom of the arch, gradually giving it the desired shape.

Do not use too much force when bending drywall, as you risk damaging the slab. Move cautiously, with small steps, and the drywall will take the form of an arch in a matter of seconds.

Cracking gipsokartonnogo sheet
Installation of gypsum plasterboard arc.

When installing a gypsum plasterboard, align perfectly its edges with arched walls. Also, make sure that the ends of the rectangle correspond to the arc, otherwise correct the length of the rectangle.

Fix the drywall with several screws at the top of the arch and continue to fasten it, moving to the edges. Screw the screws from each side of the arc at a distance of 10-15 cm from each other, using a screwdriver with torque adjustment. Work with great circumspection, because you are almost finished building your gypsum plasterboard arch. Step by step, as you twist the screws, moving from the center of the arch to its edges, the gypsum cardboard fragment will acquire the form you have conceived.

We fix the drywall arc
Fastening of drywall with self-tapping screws.

Pay attention to the correct technique of fixing the curved arch section. You must move from the center of the arch to its edges, twisting the screws in a mirror sequence.

Attaching the arc from the center to the edges
Completion of the creation of an arch of plasterboard.

Make sure that you work in the right conditions: the workplace should be well lit and ventilated. You should use protective gloves and glasses whenever the situation requires it.

Arch of plasterboard, fastened with screws.

After you have finished installing the gypsum plasterboard arch, you should pay attention to the small details. It is possible that in some places the plasterboard panel was not perfectly even. Use the knife to align all the edges. Do not forget to wear protective gloves to avoid possible cuts with a sharp blade.

Eliminate the unevenness of the arch
Trimming uneven edges of plasterboard with a knife.

Finishing of gypsum plasterboard arch

After you have built the frame of the arch and plastered it with gypsum plasterboard, it's time to move on to the next stage - finish finishing. Only after the completion of this stage you will be able to boast that you were able to make your own hands an interior arch of plasterboard.
You will need to glue the edges of the plasterboard and all joints with a special paper tape or fiberglass mesh, apply at least three layers of putty and sand the surface several times using sandpaper of various granularity. These operations are not very complex and do not require professional skills. We will introduce you to the basic principles of work, so that you have the opportunity to finish your project.

Once again, assess the quality of the plasterboard arch made to you to make sure that everything is done correctly, that its side walls are at the same level with the wall above the doorway, that the whole structure is fairly rigid and reliable. If everything is in order, you can proceed to the shpatlevaniyu.

Finishing the bottom part
Finishing the lower edges of the gypsum plasterboard arch.

For finishing, you can use acrylic putty for interior work. But all the gypsum cardboard joints should be sealed with a special stronger stucco for gypsum board joints. This will prevent the formation of cracks in the joints. The putty should be thoroughly mixed, using a nozzle on the drill, to a uniform consistency. Do not forget to carefully read the factory label on the bag with the putty.

Use gloves to avoid getting your hands dirty. In addition, with shpatlevanii it is better to change into old clothes, since it, most likely, too, will become dirty.

Application of putty
Use a rectangular spatula to apply putty on the arch of gypsum board.

Linear movements begin to apply the filler for the gypsum board joints to the joints between the plasterboard and the doorway with a rectangular spatula. It is a very useful tool, and we recommend that you buy it - the money spent will certainly pay off, especially when working with curved surfaces.

Make sure that there are no scraps of paper or pieces of gypsum in the area you are working on, as they can, by mixing with the putty, degrade the appearance of the surface.

Application of putty with a simple spatula
Putting putty with a spatula.

Using a spatula, apply the composition to the self-tapping screws. Remember that you need to apply enough filler to create a perfectly flat surface.

Coating hats self-tapping putty.

If there are any minor defects in the surface of the plasterboard (dents, holes), simply fill them with putty, and then use a spatula or grout to remove excess material and smooth the irregularities. Do not forget to make sure that the leveled surface is level with the rest of the wall and the arch, as later it will be difficult to correct these errors.

First layer of putty
The first layer of putty on the gypsum board arch.

Repeat the process until the surface becomes even, without any noticeable flaws. Remember that you should apply three layers of putty. The first should be as thin as possible, but at the same time it must cover all the irregularities of drywall.

Do not apply too much putty right away. Distribute the already applied amount to a larger area, moving the grout several times. Excess material return to the bucket.

Tip: Pass the trowel over the curved surface several times until its line becomes perfectly smooth.

Putting putty on the joint of plasterboard with a wall.

If you have completed the filling and are satisfied with the result, you can proceed to the next stage - gluing the joints and edges of the drywall to hide irregularities, giving the gypsum strength and preventing cracking. There are two alternative materials designed for this purpose - special paper tape and fiberglass mesh. You can choose any of them - they are both good enough. We used fiberglass mesh in this project.

Bonding Serpians
Glue the fiberglass mesh to the joint.

Measure and cut a piece of mesh of the desired length. Then place the mesh or paper in the center of the joint and gently squeeze it with your fingers or a spatula into the fresh putty. Carefully make sure that the mesh is well stretched during installation, otherwise folds will appear.

Bonding the mesh
Bonding the paper mesh to the junction.

Make sure that the tape is well fixed on the surface and there are no unwanted folds. If you do not like some site, just tear off the tape from the wall and repeat all over again, this time correctly.

Glue the fiberglass mesh onto the curved part of the arch

Now that we have pasted the paper tape / fiberglass mesh to the joints of the arch with the wall, it's time to glue the curved fragment of the arch. The technique of work in this case practically does not differ from those you have already tried. One side of the grid is covered with an adhesive compound, so it will be held on the drywall. Do not forget to tighten the tape during installation.

Gluing the arc-shaped part of the arch, you probably noticed that when wrapping the second half of the tape on the perpendicular gipsokartonovuyu wall folds appear. The solution to this problem is very simple - you need to cut the ribbon with the help of a sharp knife in the places where wrinkles appear, and then attach it.

Finishing the curved edge of the arch.

When the putty dries, it becomes completely white. Use medium-grained sandpaper to smooth the surface, but do not remove the coating too much, otherwise the paper tape / fiberglass mesh will be exposed.

Be sure to use a respirator, because the dust resulting from such manipulations is very harmful to the lungs.

Clean the surface of the dust and apply a second layer of filler on the entire surface of the arch. When it is dry, sand with small sandpaper.

Application of the second layer of putty.

Thoroughly clean the surface with a dry cloth or large brush to remove dust. It's time to apply the third, final layer of putty. In order for the layer to be thin enough, use a rectangular spatula.

Wait 10-12 hours until the coating dries completely (the putty should turn white). Grind off the surface again with fine-grained sandpaper, smoothing out any irregularities and resulting in a perfectly flat surface.

Finished arch
Sanded surface of the arch of gypsum board.

Now your arch is ready and you can start painting its surface.

We hope that our step-by-step instruction on how to make an arch of plasterboard with your own hands will be useful for you, and you will be able not only to realize your project, but also to believe in your own strengths and almost limitless possibilities.

Source of translation: www.howtospecialist.com

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