The brick oven is designed for a long service life. But sometimes it can fail for one reason or another. To less often face the problem of serious destruction of a brick oven, it is necessary to carry out preventive and repair work on time.
You don't need to call the wizard to fix minor problems. You can solve such issues on your own, having a little skills in construction.
Attention: experts strongly recommend, before starting the operation period, to conduct a thorough inspection of the brick oven for its performance. Timely preventive and repair work will prevent fires and accidents.
The whole work process is reduced to heating the stove with wood. It is better to use alder or aspen firewood, as they quickly burn out, form good traction, and burn out soot. If you sprinkle the wood with salt, you can remove soot from the chimney and chimney. This procedure is recommended every three months.
Attention: the new grate from the grate must be exactly the same size as the old one. It must be laid in its original place without using a solution.
Renovation of masonry joints is also a medium-sized renovation work. They not only spoil the appearance of the structure, but also let harmful gases into the room. To detect problem areas, it is recommended to heat it. To solve the problem, you must:
So that after drying the clay does not crack, it is worth adding a little table salt to it. For one bucket of clay, it will be enough to add 300 grams of salt. If the cracks in the masonry are large and deep, they should be sealed with a refractory cord.
A loose fireplace door can be reinforced. If you notice that cracks have formed around the doors, and it staggers a lot, it's time to repair it:
The prepared composition should be similar in consistency to sour cream.
After strengthening the furnace door, after 24 hours, heat the structure with a small amount of firewood.
If you need to replace burnt bricks without disassembling the stove, prepare the following materials and tools:
Instead of old burnt-out bricks, it is necessary to lay new material, having previously moistened them with water. Next, we apply the solution to the masonry.
Attention: the prepared mortar must be thoroughly lubricated with the place of the fallen brick. The new material is placed in its original place, pressed and sealed.
It also happens that the refractory brick, from which the masonry is laid, collapses and becomes unusable. In this case, it is necessary to repair it through the fire door. If the damage is small, clay solution will help to cope with them. If only a few bricks are destroyed, it is recommended to replace them by removing the old mortar.
The old mortar is removed with a construction tool, this place is wetted with water, and new bricks are laid on top.
When repairing the firebox, it is advisable to use the same mortar that was used during the construction. After repairing the firebox, it will be possible to use the stove only after a week.
If you want to restore an old brick stove and return its aesthetic appearance, you should stock up on the following materials:
When decorating the stove with tiles, it must be laid on a prepared and flat surface. Be sure to use bas-relief edging and murals. The advantages of this material include:
If you want to paint your oven, look for a material that can withstand temperature extremes. To give the product originality, use a stencil to apply drawings and ornaments with paints.
Whitewashing the oven is the most common option. Add salt to the lime to add a snow-white shine.
Before you start repairing a brick oven, be sure to take care of safety precautions:
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Summing up, it is worth noting that timely preventive maintenance and repair of minor problems will significantly extend the life of the brick oven. Keep in mind that repair work must be carried out with full responsibility, since not only the performance of the structure and its appearance, but also the safety of your home, depend on this.
A brick oven can serve for several decades if you regularly engage in preventive maintenance and promptly eliminate damage and breakdowns. Depending on the complexity of the work, it is customary to subdivide furnace repairs into current, average and major. Minor problems are easy to fix in a few hours, while major problems can take days. To save on stove-maker services and extend the life of the stove, it is recommended to make repairs already in the first years of operation.
Professionals strongly recommend that you carefully examine the state of the hearth before the start of each heating season. Timely repair of stoves and fireplaces prevents accidents and fires.
Any owner, even if he does not have building skills, can perform minor repairs to a stove in a country house or in a residential building.
The scuffs that appear on the pre-heating sheet make cleaning difficult and can cause a fire. The leaking metal must be removed, the floor covering must be protected with an asbestos sheet and roofing steel of the required size must be nailed on top.
To replace the grate, you need to remove the old part from the oven and clean the area of soot. The new grille must be exactly the same size as the broken one. It is laid in place without mortar, similar to the old grates.
The chimney should be inspected twice a year for foreign objects and debris. It is recommended to use special chemicals to clean the canals from soot.
Leaky seams spoil the appearance of the brickwork and let harmful gases into the room. To detect weak areas, it is recommended to heat the stove - this will make large cracks visible. To eliminate the problem, it is necessary to clear the seams by 2-3 cm, having previously soaked with water. Next, the walls are washed well with clean water using a brush.
The resulting depressions are filled with new clay mortar, carefully compacting the mixture and rubbing the voids. To increase the resistance of the mortar to cracking, you can add a little table salt to the clay - 300-350 grams per bucket of mortar. It is recommended to seal wide gaps with a fire-resistant cord. If necessary, the walls are plastered and whitewashed or tiled.
The gaps formed between the doors and the masonry due to mechanical stress and thermal expansion also begin to let dangerous gases into the room. Do-it-yourself oven repair in this case begins with cleaning the surface and removing the old solution. The cleaned area is washed and primed with heat-resistant glue diluted in the same volume of water.
A sealing asbestos or ceramic cord is attached around the perimeter of the door - it protects the clay from cracking, compensating for the differences in thermal expansion of materials. In order not to buy a fake instead of a fire-resistant cord, experienced stove-makers recommend setting fire to the purchase without leaving the checkout. Next, the area around the door is rubbed with repair mortar and left to dry for at least a day.
Similarly, the gaps that appear between the hob and the walls are eliminated. To remove the stove, heat the stove a little, then pry the cast iron with a hard metal object, such as an ax. Instead of a cord in this case, you can use basalt wool or felt. If possible, the old stove can be replaced with a more modern one.
Medium-level malfunctions will also not be difficult to eliminate without the involvement of experts. This approach will help save money on the services of a stove-maker.
Over time, the refractory brick from which the firebox is made collapses and requires attention. Do-it-yourself repair of the furnace firebox is carried out through the furnace door. In the case of minor damage, the destroyed areas are restored using clay mortar or factory-made masonry refractory mixture. If several bricks are damaged, a partial replacement can be dispensed with. To do this, soak and clean the solution in the right place and remove the damaged element. New bricks are carefully inserted into the voids and carefully covered over. It is advisable to take the same composition that was used during construction.
It is not always possible to completely replace the lining through the combustion hole; in some cases it is necessary to disassemble the wall. If the top of the stove is covered by a hob, it is easier to get to the top of the combustion chamber. The new lining is made of fireclay bricks, not forgetting that the refractory material should not be tied up with the one from which the furnace body is folded. In large ovens, bricks are laid flat, in small and medium-sized ones - on the edge.
A new cast-iron door must have the same parameters as a broken one. In order not to be mistaken, you must measure the width and length of the product before purchasing. The old door is dismantled together with the frame, clearing the masonry as much as possible in the right places. So that the masonry mortar can be easily and quickly removed, it is soaked with water. Just in case, you need to stock up on a few bricks - they will be needed if unforeseen destruction occurs during dismantling or unusable bricks are found. Steel legs are attached to the new cast-iron door and set so that the strips are in the masonry seams. An asbestos or ceramic cord must be placed between the masonry and the frame. The gaps are filled with a solution, carefully eliminating all the cracks.
Major renovations are rarely complete without replacing damaged bricks. Most often, the problem occurs over the firebox door. The damaged elements are carefully removed from the structure, after soaking the solution, and the resulting "window" is cleaned from the remnants of clay. The new brick is immersed in water for a few minutes and placed on a refractory mortar, after which possible gaps are filled and the seams are rubbed. When repairing a sauna stove, it is recommended to seal large gaps with a mortar with the addition of brick chips made from refractory bricks. The repair of the Russian stove in many cases consists in the restoration of a destroyed or sagging vault. As a rule, to eliminate the destruction, it is required to make a new circle and move the brick in this area. The second vulnerable spot of the Russian stove is underneath, here the burnt-out bricks can be easily removed and replaced with new ones.
For those who do not feel the strength to repair a brick oven with their own hands, we do not recommend taking up work. In this case, as well as if a complex chimney repair is necessary, it is better to immediately seek professional help from experienced stove-makers.
Describe your question in as much detail as possible and our expert will answer it
Due to regular temperature fluctuations of large amplitude, the operation of the furnace sooner or later fails. Any owner can repair a brick oven with his own hands, having initial technical knowledge and skillful hands.
The main thing is to do it in a timely manner, then you will avoid troubles and fires.
Usually renovation work are divided into three types:
elimination of minor problems
medium troubleshooting
elimination of serious defects (overhaul).
We advise you to remember that regular inspection of the oven before the heating season and maintenance is a way to prevent possible serious damage to the structure in the future.
What minor problems can you face when operating the oven and how to fix them?
This problem can occur due to the following reasons:
the stove was not used for a long time, and cold air accumulated inside the chimney;
there is no air flow to support combustion;
exposure to strong winds from the street;
soot clogged the smoke ducts.
we ignite the stove not with paper, but with a piece of rubber or dry fuel.
Attention! The use of kerosene or other flammable liquids is prohibited.
In case of a blocked chimney, you need to carry out the following activities:
light the stove;
pour coarse salt (about a handful) into the firebox;
close the damper immediately;
soot will fly out in chunks into the chimney.
If this method does not help, then it is necessary clean the pipe with your own hands by opening a special door, or taking out knocked out bricks. Experienced kiln craftsmen will always leave doors or knocked out bricks for cleaning.
To determine, where are these bricks located , do this:
make an external inspection of the oven; especially in places of passage of smoke channels;
the knock-out brick is usually displaced slightly outward, in contrast to the main masonry;
clean the old mortar and take out the brick. This will make the smoke channel accessible and you can clean it;
then replace the knock-out brick and coat it with clay mortar.
as a result of which the stove began to smoke.
In addition, its appearance is spoiled.
Heat the stove and you will notice cracks that need to be covered by hand.
Sequencing:
soak the seams, and then clean them 2 - 3 cm;
rinse the walls with a brush using clean water;
prepare a solution by mixing clay, sand, asbestos fiber and salt (at the rate of 100 grams per 3 liters of the mixture); an indicator of a quality solution is an average viscosity. You can purchase a ready-made solution at a hardware store;
fill the seams with a clay mixture, compact it, wiping out all the voids;
if necessary, plaster the walls, whitewash or tile.
It is required to replace it with a new one.
Sequencing:
clean clay and dust from the place where the old brick lay;
moisten the place with water and put a clay cake on it;
wet a new brick, coat its top and sides with a clay mixture (we prepare it first in the same way as for covering the cracks);
to lay it instead of the damaged old brick.
Sometimes, in case of moderate damage to the furnace, it is impossible to do without self-repair and strengthening of some parts.
Mechanical stress and temperature fluctuations can lead to the formation of gaps around the door of the firebox or hob. As a result, hazardous gases escape outside.
These places need to be compacted.
Sequencing:
clean the surface, remove the old solution;
rinse and prime it with heat-resistant glue diluted with the same volume of liquid;
attach an asbestos or ceramic cord around the door or hob to prevent cracking of the clay.
rub the necessary areas with the repair mixture;
dry for at least a day.
Advice: in order to check if the fire-resistant cord is tampered with, set it on fire right at the cash register.
You can eliminate the cracks around the hob using the same algorithm. Heat the oven before removing the stove. Then pry off the metal with an ax. It is permissible to replace the asbestos cord with basalt wool or felt. If the old stove is completely leaking, replace it with a new one .
It becomes necessary if cracks and cracks are located around the entire perimeter of the oven ... In this case, it is best to shift the masonry, but if you do not have enough time, you can resort to screeding the frame with a metal wire.
Sequencing:
we chase special channels with a depth of 15 to 20 millimeters in the oven strictly horizontally;
we lay the wire in the grooves so that it provides the frame screed;
we stretch the wire by twisting it with a beard or a thick nail so that it does not break;
plaster the stove.
When replacing the grate, keep in mind that there must be a gap between the brickwork and the grate. It must be covered with sand. The new grill must be exactly the same size as the old one.
This manipulation should be performed only when the sheets are punctured or rusty. Sequencing:
removing the old sheet;
excavation of nails;
laying a piece of felt that has been previously soaked in clay solution;
nailing a new sheet.
Sometimes the damage to a brick oven is so serious that it is necessary to restore its full performance, replace or improve the broken parts.
Lining is nothing more than protection of the furnace surface from various mechanical and thermal damage. In our case, this is the use of fireclay bricks.
If the firebox lining is damaged, it must be replaced.
Important! For old and new masonry, use a homogeneous brick so that the coefficient of thermal expansion does not change.
Simple work can be done through the firebox door. To do this, it is enough to restore the damaged areas with an earthen solution or a factory-made refractory mixture.
Partial replacement of bricks is performed in the following sequence:
prepare the mortar that was used during construction;
soak and clean up the old solution in the required area;
remove the item that has been damaged;
insert a new brick into an empty space and cover it well.
For these manipulations, a ready-made refractory solution can also be used - Chamotte mortar, which consists of chamotte and refractory clay. Then the seams of the furnace will be able to withstand more than 1700 degrees.
Complete replacement of the lining is carried out only after dismantling the wall. The main masonry must not be touched.
Sequencing:
disassemble the wall from the hearth to the ash hole; do not touch the stove ribs;
remove the remnants of rubble;
lay out a new fireclay brick lining so that it is not tied up with the material of the stove body. Observe the thickness of the seam - no more than two millimeters.
if the stove is large, lay the brick flat. If small or medium - on the edge.
This may require plastering of the masonry, or even busting it in case of destruction.
The main method is to lay out the walls of the firebox with fireclay bricks using refractory mortar. Install slopes on the sides of the firebox. On them, hot coals will fall down during the heating process and close the grates.
It is important to use only high quality bricks.
It is better to prepare tools for repairs in advance.
You will need:
brick;
double-sided hammer;
Master OK;
plumb line;
level;
roulette;
bucket for solution preparation.
Not all the subtleties of repair can be described in words, the video will show this clearly.
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No matter how reliable and properly folded the wood stove is, sooner or later the time will come to repair it. Temperature fluctuations, irregular use, mechanical stress, dampness and other factors lead to cracks in the masonry, loosening of doors, clogging of chimneys, etc. Anyone can do a simple repair of brick ovens with their own hands if they know how to do it correctly.
We are not talking about complex manipulations that require knowledge about the structure of the hearth. In such cases, it is better to entrust the work to a professional. But some actions are completely subject to "dummies". We will talk about them.
What defects require mandatory intervention? This is the appearance of cracks on the surface, spalling of mortar from the seams, loose bricks in the masonry. And, of course, smoke escape into the room through cracks and crevices around metal parts.
Let's take a closer look at how to eliminate each of these shortcomings with our own hands.
Advice. The oven must be slightly warmed up before any repairs.
If the mortar from the seams has crumbled so much that it has ceased to hold the brick, it must be strengthened. Or, if it itself cracked or fell apart, replace it.
It is important! The composition and characteristics of the new brick should be the same as the old one. Otherwise, the expansion with increasing temperature will be different, which again leads to the same problem.
The algorithm for replacing bricks is shown in the table:
If you don't have a drill, a chisel and hammer will do.
How and from what to prepare the repair solution will be discussed a little further.
Very often cracks appear around the doors of the combustion chamber and blower, cast-iron hob. This is due to the fact that metal and clay have different thermal expansions.
But this does not mean that they cannot be compensated. It is possible, and for this, special heat-resistant materials are used as a gasket and seal. For example, basalt wool or ceramic stove cord.
Note. Previously, repairs to the furnace of a brick kiln were carried out using asbestos materials. This should not be done, since asbestos releases toxic substances when heated.
Step by step, this type of repair looks like this:
We clean the seat from the solution and thoroughly rinse off the soot with water.
With this solution we prime the place of installation of the plate.
It is advisable to check its fire resistance when buying so as not to run into a fake.
A cast-iron cooking surface is laid on it, on the solution.
In wide and deep slots, a ceramic cord is first laid, then a repair mixture.
As for the solution, repairing a brick oven with your own hands will be of better quality and more durable if you add 10% Portland cement and 10% heat-resistant glue to the sand and clay. Although, you can buy a ready-made dry mixture, and dilute it according to the instructions on the package.
Before covering up the cracks, the surface of the stove must be washed from soot, since the solution will not stick to it due to the high content of fat in it.
So, before proceeding with the repair, we slightly heat our hearth.
You can ideally repair brick ovens with your own hands, but if the solution did not meet the conditions of their operation, all the work will go down the drain. And preparing the "right" mixture is not so easy, professionals have been learning this for years.
Therefore, it is better not to experiment, but to buy a ready-made dry mixture. There must be a note on it that it is intended specifically for laying and repairing stoves and fireplaces.
Such mixtures are made on the basis of chamotte clay and are refractory. They can also be used to plaster the walls of the oven to ensure that all cracks are bridged.
It is very easy to prepare a working solution from a dry powder - the instructions on the package contain information on how to do this, what proportions to use.
Plaster the stoves on a surface moistened with water, applying and smoothing the mortar with a spatula.
If necessary, after the first has dried, apply a second leveling layer and wait for the coating to dry.
After that, the furnace is flooded. The solution hardens completely from the heat.
If small cracks appear on the surface, they are covered with the same, but more liquid solution. You can use a brush for this.
Quite often, the stove starts to smoke in the absence of any visible defects and destruction.
The reason lies in the clogging of the chimney:
It can literally become overgrown with soot, especially if coniferous wood was used for the firebox or household waste was burned in the hearth;
The chimney could get debris from the street, carried by the wind. Sometimes even dead birds are found there;
Another common reason is a broken piece of brick or a whole brick that has fallen out of the masonry.
All of these factors negatively affect the cravings that need to be restored.
If the stove is folded correctly, it should have special doors for cleaning the chimney. They are opened and debris and soot are removed from the inner cavity using a scoop, a hard brush and a broom.
After cleaning, you need to check the draft by holding a burning paper or candle to the open door. The smoke should be actively drawn into the hole.
More serious blockages will require mechanical cleaning of the chimney from above, from the roof. A weight tied to a strong long rope or chain is lowered into it, breaking through the congestion with it. The debris that has fallen down is removed from the firebox.
Advice. Burning aspen wood in the oven will help to completely clean the channel. When it burns, it gives the maximum temperature at which the soot burns out.
Knowing how to repair a brick oven, you can save a lot on the services of a master. And in order to do this less often, try to regularly care for the stove, lubricating the cracks that appear. Clean the chimney at least once a year and do not incinerate household waste in the firebox.
In the video in this article, you can see an example of self-repairing a home.
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weak or no draft, slow combustion of fuel, penetration of smoke into the room in the case of an open firebox door, as well as in the wind;
the appearance of dark spots on the outer surface of the smoke channel due to excessive moisture;
loosening and detaching the doors of the fuel combustion device and other furnace components;
rapid heat loss after completion of the combustion process;
weak or excessive heating of surfaces and their areas;
cracks in the masonry that cannot be repaired;
installation of stove appliances of inappropriate dimensions, various irregularities inside the smoke ducts.
The main thing is to start repairing the stove on time, without putting yourself and your loved ones at risk. Only a working device can guarantee both fire and sanitary safety. The nature and complexity of the work determine the scale of the repair, which can be current, medium or major.
Weak draft or its absence can arise, for example, due to the accumulation of a large amount of cold air in the chimney during a long break in the operation of the stove. However, there are other reasons: obstruction of the channel (clogged with soot), squally wind outside, there is no access to air, the flow of which could support combustion.
In this case, you need to light the fire not with paper, but with a dry substance, for example, a piece of rubber. In this case, fuel (kerosene, etc.) should not be used.
If more than a year has passed since the moment the soot was "burnt out" in the chimney, most likely it will be clogged. To eliminate this problem, you need to act as follows: first try to get rid of the soot by pouring a little coarse salt into the burning stove and immediately closing the shutter. Burning down, the layer of soot begins to crack strongly, pieces of it fly out of the chimney. If this method turns out to be ineffective, you will have to apply manual cleaning. There is a special door for this.
One of the signs that cracks have formed in the brickwork is the strong smoke from the stove. In this case, the seams must be sealed with a clay-sand mixture, adding salt and crushed asbestos fiber to the solution. The last ingredient is used for elasticity. In terms of consistency, the mixture should turn out to be not very viscous, but not liquid either: after drying, a too greasy solution will crack, and a thin one will not provide the required strength, which will lead to the destruction of the masonry. To save time, you can purchase a ready-made mixture in a specialized store. An instruction is attached to it, following which you can quickly and easily dilute the solution and perform all the necessary work.
Another problem is the need to replace the old, burnt-out brick with a new one. To do this, the surface must first be prepared: remove dust and clay, moisten, then put a clay cake there. A new one is put in place of the burned-out brick, after immersing it in water and applying the prepared mixture to it both from above and on the sides to fix the seams. It is necessary to use the same mortar as for filling the cracks.
VIDEO Before proceeding with the sealing of the joints, they need to be prepared: remove the residual clay, rinse thoroughly with water using a brush, then prime with heat-resistant glue (a 50% solution is suitable). When grouting the joints, make sure that the repair mixture fills the joints to the end, leaving no voids. If too large a gap has formed in the masonry, in addition to the mixture, a ceramic cord must also be placed in it. Due to its physical properties, it not only withstands open fire, but also very high temperatures - over 1000 degrees.
Ceramic cord is often counterfeited, therefore, before purchasing, you need to bring a lighted match or lighter to it in order to evaluate the heat resistance of the product. The cord is placed in the seams of the masonry along the perimeter of the cast-iron plate, using heat-resistant glue for fixing.
To protect the elements of the stove that do not need to be repaired, they must be covered with masking tape.
If it is necessary to replace the grates in the oven, an expansion joint with a thickness of 5 mm must be made between them and the brickwork.
If the firebox door falls out, it can be secured using steel wire. However, you first need to disassemble the brickwork around the sash.
Pre-furnace plates, as a rule, cannot be repaired: perforated and rusty elements are simply replaced with new ones. In this case, the old product is removed, the nails are removed, then a felt soaked in liquid clay is placed on the bottom, and a new sheet is placed and nailed on top.
If there is a need to replace the lining, the same brick is taken for the new brickwork that was used for the old one. The thermal expansion coefficient must remain the same.
In case of damage to the firebox lining or hearth, more serious work will be required. As noted earlier, it is necessary to maintain the same coefficient of thermal expansion, therefore, the homogeneity of the selected material, namely brick, is extremely important.
These types of work include the following: replacement or repair of faulty elements, as well as the return of the furnace once lost performance. Many people think that such a reconstruction can only be done by an experienced stove-maker. However, this opinion is erroneous: any home craftsman can do this kind of work.
If it is necessary to replace the lining, experts advise against touching the main masonry. The wall of the stove must be dismantled from the bottom of the ash pan to the height of the firebox, without affecting the ribs, then cleaned of rubble after disassembling the old lining and lay out a new one without fastening it to the masonry of the walls. The thickness of the seams should not exceed 2 mm.
The upcoming transition of the stove to another type of fuel is a serious task, and each stove-maker solves it in his own way. As an example - one of the methods. First you need to lay out the walls of the firebox using fire-resistant bricks. In this case, it is required to use a solution that can withstand high temperatures and open fire. The sides of the firebox must be equipped with small slopes so that at the moment of heating the coal falls down, closing the grate. In this case, it is important to use only high-quality bricks.
Repair of a sauna stove is carried out in the same way as the restoration of a conventional heater. The only difference is in preventive measures that need to be carried out more often. This is due to the higher temperature regime of the bath device. In this case, special attention should be paid to both the fire resistance of the brick and mortar. If the tile is broken, it is forbidden to use such a stove until it is replaced with a new one.
If an external examination of the rear wall of the structure does not reveal serious damage, then the device is suitable to become a frame for repair work.
When inspecting the oven, the following facts may come to light:
The device does not have an additional blower, the so-called summer, which enhances the furnace draft when it is fired up.
Changing the location of the blower: instead of the lower part of the firebox (under the door), it is placed on the side of the end of the furnace.
In addition, there may be no additional hood above the hob, and the heating of the room is less on the side where another wall is located. These errors also need to be corrected.
The second minus is the location of the view relative to the upward-going smoke channel. From an ergonomic point of view, this valve cannot be positioned horizontally all the time. This leads to the disruption of her work or, as the stove-makers aptly put it, to “the tears of the stove”. The fact is that in winter, especially during frosts, a lot of condensate accumulates in the equipment, which, mixing with soot, turns into a solution of carbonic acid of high concentration, which leads to the gradual destruction of the masonry.
So, thanks to an external examination, it was possible to identify problem areas that need to be worked on.After that, you can start repairing the brick oven with your own hands.
VIDEO First, it is necessary to dismantle the firebox, in the design of which there are serious errors. It is important to consider that when working in a residential building, you need to remove or cover objects with a layer of polyethylene. After dismantling the slab, it became clear that about 80% of the bricks were unusable.
The chimney cleaning duct is located at the bottom, and the smoke extraction duct is at the top. During the work, it is necessary to place the firebox so that the pipe is not located on the side, but is directed towards the device for burning fuel.
The next step is to remove the chimney door located at the bottom of the oven. The chimney hoods must be cleaned.
It is required to get rid of the casing - blocking the channel in the upper part of the furnace. The task of the foreman in this case is to reduce the number of pipe bends. Their cleaning is impossible due to the lack of a hatch. The deterioration of such a place is associated with a large amount of soot, which accumulates in the chimney channel, and hardens over time. The impossibility of the cleaning process only exacerbates the situation. The opened canal casing resembles a blood vessel clogged with cholesterol. The smoke outlet is provided only by a narrow gap, as a result of which it rises high above the firebox. It is necessary to dismantle the casing in such a way that the old masonry falls on the joint with the new one.
To remove the furnace view, it is required to disassemble the masonry located above the casing.
Having completed the dismantling of all elements that need repair or replacement, you can proceed to the construction of the firebox. The scheme here is simple: the first row is the base of the furnace, then the ash pan and the parallel channel of the additional blower. Further, the work is no different from the construction of a conventional furnace.
On the right side, there is an ash pan, which will create additional thrust at the beginning of the combustion process, and on the left side, a blower with an ash pan and a combustion chamber system are located.
In order to raise the stove with a hob, you will need to lay out 11 rows. When performing the top level, you will need to apply a bonded masonry. This will make it possible to place a hob and decorative tiles on it in the future. It is necessary to wait for the mortar to dry, then continue the reconstruction of the oven.
The next stage is the laying of the casing of the heating device. The first row should be strapping: this will create a base for the chimney. The next two levels will remain hollow due to the joint between the pipe and the previous oven channel. Next are the chimney piping and the fifth row masonry - the control one. Its function is to provide the combustion products with one more obstacle on the way to the premises.
It should be emphasized that a fire-resistant basalt cord with a diameter of 4 mm is used during installation. This helps to reduce the formation of condensation, and when it drains, it will fall into a separate cleaning hole located at the bottom of the oven.
A wedge lock is used to close the rows above the blower and combustion chamber. Its main advantages are a high degree of reliability and the ability to abandon the use of metal corners, which, during the operation of the furnace, lead to its destruction, causing a large linear expansion.
In general, repairing a brick oven is a very real task.
Video (click to play).
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