A tiny but crucial component of plastering that guarantees your walls and corners have a neat, polished finish is the perforated corner. Although it may appear to be just a plain piece of plastic or metal, this tool is essential for fortifying and safeguarding the edges of your walls.
It can be challenging to keep corners smooth and straight when plastering. In addition to providing guidance for plastering, a perforated corner strengthens these susceptible areas against chips and cracks over time.
This post will go into more detail about what a perforated corner is, how plastering uses it, and why having one is essential to producing walls that are flawlessly finished and long-lasting.
- Right angle.
- Corner – beacon.
- Corner – protective pad.
- Plastering slopes.
- Arched corner.
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Right angle.
For both internal and external corners, a right perforated corner is available. It can be made of plastic (polyvinyl chloride), aluminum, or galvanized, and it can vary in width. Generally speaking, nothing differs. One cannot be deemed superior or inferior. However, compared to the others, the galvanized corner is more rigid. in particular, the larger one. It is therefore practical to use it as a plaster beacon.
Use high-quality, sharp metal scissors to cut the corner because the bent edges will cause a lot of interference. Nonetheless, a standard stationery knife can be used to cut plastic products with ease. In the event that you are without a knife, scissors, or grinder, you can break the perforated corner. You can easily straighten uneven edges with pliers, a hammer, or your fingers alone.
A V-shaped profile is created by plastering any straight corner. There are numerous holes—perforations—along the entire plane of its sides, or shelves. The corner’s top protrudes by approximately 1 mm in relation to the shelves, making it stand out. Additionally, it protrudes outward at the outer corners and inward at the inner ones. For dependable fastening, perforation is required; the top serves as a spatula guide.
Advice: To cut twelve identically sized perforated corners, stack them one inside the other. Then, after measuring with a tape measure, use a grinder to cut off the entire pack. And metal scissors will be used to cut two or three pieces.
What the perforated corner is used for and how to install it
There are two ways to install this finishing accessory, depending on the task: on a leveled corner or on a crooked one.
Plaster with a perforated corner is a necessary tool for smooth, long-lasting wall edges that guarantee strength and a polished appearance. It is intended to strengthen corners, stop cracking, and facilitate a simpler, more effective plastering procedure—particularly in high-traffic areas where walls are vulnerable to damage.
Corner – beacon.
The product will function as a plaster beacon in the first scenario. A plaster mixture is applied to the base corner in preparation for its installation. By the way, working with gypsum plaster is more convenient than working with cement. It is best to apply it in flat cakes only, not all the way along the edge, so that it is easier to level and adjust the angle along the plane. Plastering rule and building level are used to make this adjustment.
Advice: The plaster beacon will set in a matter of minutes if you mix in a handful of cement, or any type of cement mixture, with the gypsum plaster. You can get back to work right away. To prevent overlap, it is best to cut the superimposed corners at a 45-degree angle where perpendicular planes intersect.
It should be noted that using the internal perforated corner as a plaster beacon is very inconvenient. It is only appropriate to draw attention to the edging’s straightness.
Installing a corner with a mesh under the plaster is advised in walk-through areas where external corners may be subjected to more intense mechanical loads. Reinforcing the corner is accomplished by firmly attaching fiberglass plaster mesh to a plastic or metal corner.
This particular kind of perforated corner serves as a precise beacon. After all, since roughly 5 mm of plaster must be applied on top of the mesh, it is nearly impossible to conceal it beneath a layer of finishing putty.
Advice: If you want to strengthen a corner that has regular holes in it, you can glue its shelves with serpyanka mesh, which will catch the wall. Additionally, fiberglass or non-woven fabric strips work well for this. Putty works just as well as glue.
Corner – protective pad.
Its installation technology is essentially the same as that of the first choice. The mixture has a more liquid consistency; only a small layer of the solution should be used.
For this purpose, a plaster corner made of plastic or aluminum works great. Furthermore, putty or plaster mixture fixes are not required. Since the base is already straight, the corner should be firmly pressed against and embrace the base.
Small screws, nails, or staples for a stapler can be used for this kind of installation. All you have to do is make sure the corner and its shelves don’t get distorted in the process.
Advice: Often, protruding nails and screws cause issues when trying to putty with their heads. They can be taken out once the corner has solidified to prevent this.
Additionally, when finishing gypsum board structures, it is typically necessary to install a perforated corner with a minimum layer of mortar. Naturally, that is, if they are put together fairly effectively.
A self-adhesive perforated corner is ideal in this situation; it consists of glue strips on the inside surfaces of the shelves that are activated by regular water. If corners need to be joined, the same materials must be used: plastic corners are joined to other plastic corners, etc.
The size of various plastering corners can vary, which will have an impact on the final finishing.
Plastering slopes.
As a result, plastering slopes is primarily done based on level. Plastering slopes in this situation is best done using a corner. And once more, like a glaring beacon. In case the slopes were poorly mounted using gypsum board or gypsum fiber board, a perforated corner can help to eliminate all of the flaws.
By the way, technology says that the basic brick slope needs to be plastered over before sandwich panels or plasterboard are installed on slopes. The plasterboard sheet will be properly set thanks to the installed perforated corner.
Arched corner.
With finishing right angles, everything is evident. How are multiple levels of ceilings, arches, and other figured structures perfectly executed? Ultimately, a plastering rule, a building level, or even a perfectly perforated corner won’t help in this situation.
An arched plaster perforated corner is used for this purpose, which is a slight modification from the original. It is always plastic in such a corner, to start. Second, there are petals cut across one of its shelves. This accessory can replicate the shape of nearly any smooth curve thanks to this solution, which makes it incredibly flexible.
Advice: Keep in mind that you cannot use a level or a rule to adjust arched corners that are installed beneath plaster. This is only accomplished visually, with the eye. Good lighting and the assistance of another person will be beneficial. It needs to be slightly compressed before the corner is installed to prevent the petals from protruding through the plaster.
There are two types of arched corners: soft and hard, depending on the manufacturer. Usually, the hard one costs more. However, it is indispensable for completing large-scale structures with smooth shapes.
The truth is that its propensity to straighten guarantees that the lines are perfectly round and free of "angularities." However, attempting to use this kind of corner on tiny ornamental pieces with sharp bends will cause irreversible fractures in it.
You can finish sharper turns, like arches with a small circle radius and other roundings, with a soft arched plastered perforated corner. But the appearance of lumps and depressions on the processed lines is threatened by the profile of such a corner’s lack of rigidity. It is advised to install soft arched corners using a plaster mixture to prevent this issue.
First, during plastering, there is an opportunity to rectify visual defects with this fastening method. Second, the bend lines will not be drawn inward by self-tapping screws or other fasteners. The arched corners should be mounted slightly taut to give the illusion of smoother edges.
| Feature | Description |
| Material | Usually made from PVC, aluminum, or stainless steel for durability and flexibility. |
| Purpose | Provides a straight, clean edge to corners, protecting them from damage and ensuring a smooth finish. |
| Application | Placed at the corner before plastering, embedded into the plaster for a secure hold. |
| Perforations | Allow the plaster to bond through the corner, making it more stable and less likely to crack. |
When plastering walls, a straightforward but efficient method to guarantee crisp, clean edges and sturdy corners is to use a perforated corner. It helps shield the wall’s most exposed areas from harm, extending their lifespan and improving their appearance over time.
Although installing these corners isn’t difficult, it does need close attention to detail. You can achieve a polished finish that improves the overall look of your walls by taking the time to set and plaster over them correctly.
Adding perforated corners to your plastering procedure is a minor yet significant improvement. It’s a simple method to give your walls strength and style while making sure they last for many years.
