Wall chamfering for wiring angle grinder

Overview of tools for chipping walls for wiring

wall, chamfering, wiring, angle, grinder

  • The classic tool is a hammer and chisel. The variant is suitable for chiselling short grooves in a soft pliable volume. It is not rational to use this method for concrete or brick. Disadvantages: high labor costs, long-term work, the final result of poor quality.
  • Perforator with a special attachment. Work is carried out in solid volume, reinforced concrete and brick. The final result is of average quality: the edges of the grooves are uneven, chipped, additional reworking is required. Lack of the tool. emits a high noise level of more than 100 dB.
  • angle grinder with diamond disc. An excellent option, perfect quality of a groove. The disadvantage of this option is the emission of dust disproportionate to the quality. Advantages: perfect result, fast work completion, productivity, low-budget method. Easy to use tool.
  • Wall chaser. It is considered the best option for wiring in walls. The device comes complete with removable discs, with a dust collector. Disadvantage of the method: expensive tool.

Wall slitting technology for wiring

Concrete wiring is done early in the renovation work. Curtains in a populated area are undesirable due to the high concentration of cement dust. Preparation for work in a living room provides for the dense conservation of office equipment, furniture, flowers, the presence of a construction vacuum cleaner for cleaning garbage and dust. Before starting work, they check with the plan for laying the old wiring, de-energize it or bypass these places. There are several concrete slitting technologies:

  • Slitting with a hammer and chisel. The process is broken down into several steps for simplicity. At the first stage, a groove is marked with a chisel along the edges of the line to the width of one or two of its points. Next, the chisel is placed transversely to the furrow and one part of it is driven into the wall with a hammer. First, the top layer is removed according to the marking, and then the groove made is deepened by 25 mm along its entire length. This sequence of actions is not so important, since the deepening is allowed immediately during the making of the groove. This method is completely unsuitable for slitting concrete walls for wiring, since the material is too hard for manual hole making.
  • The next way is to chisel the walls for wiring with a puncher. Work begins with marking the required area. The nozzles required to complete the grooves are a small drill and a blade. Along the entire length of the mowing line, along which the strobe will be made, holes are made 25 mm deep. 10-15 mm recede from each hole made and the following is done. Next, a ditch is made through the finished holes. When arranging it, the spatula is not placed across the intended mowing line, as this leads to the chipping off of excess pieces of the wall covering. With the help of a hammer drill, a groove is made for the wiring of the required width and depth, and these indicators are obtained very accurate. The only drawback is that the edges of the groove are often torn; it does not have a very neat appearance. With the help of a puncher, the chasing is carried out as quickly and accurately as possible.
  • Grinding walls for wiring angle grinder. To carry out these works, you will need a diamond-coated disc. It allows you to easily perform work on concrete and brick, in contrast to conventional nozzles, which are difficult to cope with these types of materials. Even if the work will be carried out on plaster, the diamond disc will make the groove faster and easier. At the beginning of work, the necessary mowing lines are marked, then two parallel mowing lines are made according to the marking, the width between which is equal to the required width of the groove. Between the finished cuts, a groove is knocked out with any convenient tool. a chisel or a perforator. The groove is knocked out to the required depth. This method differs from the previous two only in the use of an angle grinder, which greatly facilitates the process of making cuts for a groove. A large amount of dust is emitted from the angle grinder when making cuts. It is recommended to use an industrial vacuum cleaner to collect dust, or simply to protect all objects in the room from debris falling on them.
  • Making a groove for wiring using a wall chaser. As the name of this tool implies, it is designed just for making strobes and is used by professional builders. The wall chaser is similar to a modified version of an angle grinder, it has connectors for installing two diamond discs at once, with the ability to adjust the distance between them. The tool cover is also adjustable, which provides a fixation of the depth to which the discs will cut the groove. Often, the tool has a special dust outlet on the casing, to which the vacuum cleaner pipe is attached. The slitting is quick and easy with little dust. When the cuts along the edges of the groove are ready, the excess material between them is knocked out with a puncher or chisel. The disadvantage of using a wall chaser is that the price increases for wall chasing for wiring if this device is used. It is quite expensive and is used only for specialized work. For household gouging, it is best to opt for the option for which all the necessary tools are available.

The completion of the work has the same actions, regardless of what technology was used to make the groove. When the groove is completely ready, it is cleaned of construction dust with a vacuum cleaner or a broom. The groove cleaned of debris is treated with a primer. Laying the cable into the wall is another complex technological process that needs to be approached with maximum attention. The laid cable is fixed in the groove and covered with plaster, putty or plaster.


Overhaul, redevelopment, new construction of a house or utility room are associated with the issue of connecting or transferring sockets, switches, laying a new cable, masking pipeline systems. All communications up to 1/3 of the floor thickness are hidden in the wall panel.

  • Overview of tools for chipping walls for wiring
  • Tips from professional craftsmen on the rules for cutting walls for wiring with your own hands
  • Wall slitting technology for wiring
  • Some rules for chipping in a concrete wall
  • Structural work in the load-bearing wall
  • Installation of wires in the strobe and installation of sockets

Some rules for chipping in a concrete wall

Most buildings are made of concrete, therefore, when laying electrical communications in the wall, most often you have to deal with this material. The general principle of working with concrete is no different from the technologies described above. All the tools described are suitable for him, except for the chisel. However, there are some general rules for concrete slitting.

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When choosing a slitting technology, choosing between the option of performing work with an angle grinder or a perforator, it is better to stop at the second option. Rock drills are more powerful machines that are designed to work on hard surfaces. In addition, during the manufacture of holes, the amount of dust will not be emitted as from working with an angle grinder. It is recommended to carry out work in multi-storey buildings during the daytime and only on weekdays. The noise level from the hammer drill is so high that its operation will be clearly audible even through several overlaps.

During work, it is recommended to use the services of an assistant who will moisten the work surface when making holes. This method is widely used by builders, it allows you to reduce the amount of dust flying around the room. The disadvantage of this method is the complexity of the work, the damp wall is less amenable to slitting.

For work on concrete, builders do not recommend using a wall chaser, since in this surface it will not remove a significant part of the material and after it you will have to clean up the remnants with a puncher. Therefore, to facilitate work on concrete, the perforator is immediately used as the main tool.

Structural work in the load-bearing wall

The possibility of carrying out work on chipping in a load-bearing wall is a controversial issue. It is forbidden by law and all architectural norms to carry out any work in the load-bearing partition that weaken its load-bearing capacity. Strobing refers to this type of work. During the removal of the top layer, the reinforcement is exposed, it becomes susceptible to various influences and the formation of corrosion. If corrosion of the reinforcement begins, the entire structure of the house is weakened.

To carry out such work in a load-bearing wall, you must obtain a special permit for this. If we are talking about a panel house, then, most likely, a work permit will be refused. In brick houses, such work is most often allowed. After receiving the papers, all work is carried out very carefully in order to reduce damage to the wall to a minimum level. To determine the location of the reinforcement elements in the wall, a standard metal detector is used. He talks in more detail about how the walls are channeled for wiring, the video at the end of the article.

Tips from professional craftsmen on the rules for cutting walls for wiring with your own hands

  • Load-bearing wall structures, floor slabs, horizontal joints are unsuitable objects for wiring.
  • When drawing up a drawing, wiring gaskets take into account an important condition. the wires are located strictly horizontally or vertically. Driving the groove is outlined on the surface with a level or plumb line.
  • The horizontal laying of wires is carried out, maintaining a distance of 15 cm from the floor slab.
  • In structures from 8 cm, the wire is laid along the shortest path.
  • Do not run wiring in corners, close to window or door openings. The recommended distance from such places to the gates is at least 100 mm.
  • To lay the wiring in old walls, check the places of possible passage of the current-carrying cable. Use a screwdriver-indicator or a finder for control.

Chipping walls with a hammer and chisel

As mentioned above, trying to cut through a groove for electrical wiring in a concrete wall with these tools is not worth it. such work will be very long and tedious. But it is quite possible to cope with them with a brick wall. This procedure is performed in the following order:

  • Use a chisel to deepen the top and bottom edges of the markings.
  • Putting a chisel across the future groove and hitting it with a hammer, knock out the top layer of the groove core.
  • Removing the layers one by one, deepen the furrow by 2-2.5 cm, passing with a chisel and hammer along its entire length.

When the groove is ready, dust must be removed from it and treated with a primer. When it dries, lay the cable inside, then putty the furrow (you can also seal it with plaster or plaster).

Wall chipping tool

There are several basic ways to create strobes and the corresponding tool for this. All these tools are available for use, so making a strobe in the wall with your own hands is not difficult. Consider the most common ways of chipping walls from the most primitive to the most technologically advanced.

How to make a strobe using a puncher?

With a puncher, you can both chisel a concrete wall and make an electric groove in a brick one. There are special nozzles designed for this job, one of which is called a wide auger and the other a spatula. The procedure for this procedure is as follows:

  • Using a punch with a wide drill, drill holes 2-2.5 cm deep along the markings made.The distance between adjacent holes should be 1-1.5 cm.
  • Change the nozzle on the hammer drill by installing a spatula instead of the drill.
  • Make a furrow through all the grooves. The wire will fit into it.

Read more about chipping with a puncher on

The advantage of this method is the speed of work. The disadvantage is that the punch does not allow you to make an even groove, and the groove made will have ragged edges.

Slitting methods

There are four main methods for grooving. Their main difference lies in the use of the tool and the resulting application technologies.

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  • Hammer and chisel. The disadvantage of this method is the inconvenience of working with “old-fashioned” tools. Even with good dexterity, it takes a long time and with curved highways. A huge plus is the cost. definitely cheap.
  • Impact drill (hammer drill). Minus. strobe with uneven edges. Pros. speed of the process and relative cleanliness during work.
  • Angle Grinder. Cons. a large amount of dust, which is difficult to collect even with a construction vacuum cleaner. Plus. even grooves in a short period of time.
  • Wall chaser. The downside is the high cost of the tool. It is too expensive for one-time use. Pros. fast, not so noisy, smooth edges of the strobe, no dust.

Shtroblenie walls for wiring: options, the better

For each individual case, tools, groove directions and other features may differ. First of all, the choice is influenced by the type of building and walls that are located in the desired room. In addition, the dimensions of the groove also have an additional influence.

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Drill bit

A drill can also come in handy in solving the problem under consideration. You will need to use an electric drill, supplying it alternately with a drill, a short drill bit and a special blade.

First of all, using a drill or a drill bit, holes should be drilled with a depth of at least 25 mm and at a distance of 10-15 mm from each other. The next step, using a paddle in the form of a spatula, is the arrangement of the gutter.

One comment

With a drill, floor at an angle. will be no worse than a wall chaser.
and only an asshole will do it with a chisel, there is more dust and crooked.

Features of the work, depending on the material of the walls

A feature of slitting in concrete is that concrete has high strength.

The question often arises: is it possible to carry out chipping of load-bearing walls in a panel house? You can, but there are some peculiarities here.

When making grooves in a load-bearing wall, special attention should be paid to the fittings that are located in the wall. Damage to it must be avoided, as this can lead to metal corrosion and possible weakening of the supporting structures. In order to prevent damage to the fittings, you need to use a metal detector.

In addition, when chipping the load-bearing walls of panel houses, it is strictly forbidden to do horizontal slitting, since the load-bearing panel is constantly in a stressed state and any reduction in its cross-section can lead to the collapse of the floor panel and even the whole house.

If, nevertheless, the need for grooving cannot be avoided, then grooves on load-bearing walls should be placed only in the vertical direction, which corresponds to the direction of the stiffeners of panel structures.

When chipping the load-bearing walls of panel houses, you should make as few recess folds as possible, and the channel length should not exceed 3 meters.

Certain features also exist when chipping walls made of silicate bricks. Silicate brick is inferior in strength to concrete, and therefore it is easier to make grooves in it.

The peculiarities of chipping walls made of silicate bricks include the fact that when chipping one should take into account its natural properties, such as increased moisture absorption and susceptibility to aggressive environments.

Moisture, in case of contact with a brick, worsens its thermal insulation properties, and the aggressive media present in the soil can lead to a reaction with the lime base of the brick and its destruction, as a result of which the entire building can be destroyed.

In this regard, when chasing walls made of silicate bricks, special attention should be paid to ensure that the chases do not come into contact with source of moisture and open soil.

Wall chipping tools

For the manufacture of channels in the walls for hidden communications, several tools can be used, which in all cases are indispensable:

    Wall chaser. This is an expensive tool, it is most often possessed by craftsmen whose professional activity is directly related to large volumes of work on laying hidden electrical wiring or water supply systems. The wall chaser greatly speeds up and facilitates work with durable wall materials: brick, concrete, stone and the like. Its device is no different in complexity. The tool can be compared to a circular hand saw or an angle grinder “angle grinder”, each of which has one cutting disc, and the chaser has two. Depending on the relative position of these discs, the tool can have a different principle of operation. With a parallel arrangement of the cutting parts, the chaser simultaneously cuts a pair of grooves, between which then, with the help of a perforator, excess material is selected, forming a cavity in the form of a channel. When the disks are inclined to each other, the tool immediately selects a triangular section groove. The parallel installation of the cutting edges of the fixture allows the creation of wide and deep channels into which pipes with a diameter of up to 50 mm can be placed. It is convenient to make grooves for wiring with a tool with sloped edges. An industrial vacuum cleaner can be connected to the wall chaser, thanks to which all construction dust will be immediately removed without hanging in the air.

Angle Grinder. With this tool, you can cut a deep groove, but this work, unlike using a groove cutter, will take more time. Here, instead of a double single cut, you will have to perform two single cuts. In addition, the operation of an angle grinder is a rather dusty process.

  • Perforator. It allows you to make grooves in any wall materials. brickwork, plaster, foam concrete, etc. The work of the punch does not cause a lot of dust. Most often, this tool is used in conjunction with an angle grinder and a chasing cutter to remove excess material between the slots and form a groove channel.
  • If you need to make cavities in small quantities and in soft materials such as gypsum or plaster, you can use an ordinary chisel and hammer as a tool for chipping walls, which are probably available from any owner.

    Features of the process of chipping walls

    In principle, it is impossible to do this work incorrectly, unless the grooves are too large. Then, for their subsequent embedding, a larger amount of mortar and time will be required. Nevertheless, there are rules that allow you to make the chasing process simple, and most importantly, safe.

    The first thing you need to pay attention to is safety measures when working with a cutting tool. In addition to the large amount of dust that occurs when cutting grooves in the wall, large fragments can fly out from under the abrasive wheels, which can cause injury. Therefore, you should work in goggles, gloves, overalls, and protect the respiratory system with a gauze bandage or respirator.

    It is also worth considering the presence of existing hidden communications in the floor and walls. Damage to them during the chasing process can cause unpredictable consequences in the form of flooding or electric shock. Before starting work, the room must be de-energized, and the water supply in it must be temporarily turned off.

    Before you start marking the walls for chasing, you must familiarize yourself with the requirements of building codes and regulations, the main of which are:

      It is possible to carry out strobes only in the vertical and horizontal directions. It is prohibited to arrange them at an arbitrary angle.

    The distance of horizontal grooves from floor slabs should not exceed 150 mm. The location of vertical grooves is allowed at a distance of at least 100 mm from door, window openings and corners of the room, as well as at a distance of at least 400 mm from gas supply pipes.

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    The strobe route from the junction box to the switch or socket must have a minimum number of turns.

  • Horizontal slitting of interpanel seams and supporting structures is prohibited.
  • These rules are taken into account when planning work. The wall chamfering scheme should display the cable layout plan, the electrical fittings installation locations, the wire cross-section and the diameters of the water supply pipes. The last two parameters affect the dimensions of the channel cross-section.

    Slitting concrete walls

    When making cuts in concrete walls, it is recommended to use the hammer drill immediately as the main tool. This is due to the fact that a chasing cutter, for example, is not able to remove most of the hard material between the made slots, and the remnants of it will have to be cleaned with a perforator. The same applies to the use of the “angle grinder” for this purpose.

    The hammer drill is a powerful machine designed and built to work on hard surfaces. The process is accompanied by a high level of noise, which can spread through the ceilings over several floors of the building. Therefore, in multi-storey buildings, it is recommended to perform this procedure only in the daytime, excluding weekends from the working schedule. Otherwise, complaints from neighbors in all instances will be provided.

    To make a groove, the perforator must be equipped with two interchangeable devices. a shovel and a drill with a victorious soldering. After marking the future canals along its entire length, the drill makes holes of the required depth with a step of 10-15 cm. The punch regulator switches to the “drilling with impact” mode.

    When the holes are ready, it is necessary to replace the drill clamped in the tool holder with a blade. In the process of further work, the concrete bridges between the holes are removed, and a groove is formed on the mowing line of the marking with the depth set during drilling. The punch switch at this time should be set to the “strike” position.

    The edges of the groove made with a punch blade will not differ in accuracy. But this will have to be sacrificed, or the tool will have to be used in conjunction with an “angle grinder” equipped with a diamond-coated wheel, although there will be much more dust in such a slitting of a concrete wall.

    The main types of wall chipping

    There are two types of utilities, which are hidden with the help of wall chipping, laying in channels. These are electrical wiring and pipes for heating or water supply. Strobes for them differ in size and manufacturing technology.

    Slitting brick walls

    It is recommended to perform it at the initial stage of the repair of the premises, that is, before the finishing of the ceiling, walls and floor. The reason for this is the appearance in the process of work of a large amount of red or corrosive white dust that occurs when cutting the “angle grinder” of clay or silicate bricks.

    Walls built with these materials are highly susceptible to the impact of modern cutting power tools. To avoid a lot of noise and dust in the room, instead of an “angle grinder“, it is better to use a wall chaser connected to an industrial vacuum cleaner.

    The laying of channels in the wall using this device is efficient and very fast, various chips of the edges of the groove and the appearance of cracks in the structure are completely excluded, as sometimes happens when using a perforator.

    In order to perform chipping of a brick wall according to the existing markings, you first need to determine and set the desired distance between the two cutting discs of the channeler. Then it is required to set the required depth of cut of the channels, which is fixed by adjusting the tool casing. After that, you need to fix the pipe of an industrial vacuum cleaner on a special branch of the chasing cutter, install the cutting device on the mowing line of the marking and start work.

    When the slots are complete, the excess material in between can be easily removed with a chisel and hammer. With sufficient wall thickness, a hammer drill is often used to speed up this process. The work of his blade in the furrow easily breaks down the pliable brick.

    DIY wall chipping technology

    Excavations for hidden communications are made in the walls, which can be erected from any suitable building material. It can be drywall, wood, brick, stone and even reinforced concrete. Working with a wooden or plasterboard surface does not cause any particular difficulties. The cavities in them can be made with any hand-held cutting tool. To create channels for communications in concrete or brick, you will need special equipment and certain skills to work with it, and the slitting of load-bearing walls is completely allowed only by decision of the technical supervision authorities.

    Slitting walls for electrical wiring

    The main thing when laying cables in prepared furrows is the preliminary drawing up of a diagram of future communications with the prospect of its long-term storage, for example, among documents for an apartment or house. The layout must clearly indicate the location of the channels, as well as their binding to the ceiling, floor or wall corner, indicating the exact dimensions.

    A plan for slitting walls for wiring must be drawn up on paper, and then transferred to the walls. It is recommended to use a ruler and pencil for this. All channels should be perpendicular or parallel to the floor.

    Parallel grooves are usually made near its surface or under the ceiling. This arrangement allows you to carry out gating with maximum safety without fear of bumping into old wiring. Perpendicular furrows are directed to the locations of energy consumers: outlets, switches or other electrical equipment.

    The width and depth of the groove for wiring depends on the thickness of the cable branch, but on average does not exceed 25 mm. After installing the electrical wiring in its place, the channels are sealed flush with the wall with mortar or gypsum mixture.