High temperature insulation for home stoves. Thermal insulation materials for fireplaces Thermal insulation diagram of a fireplace thermal box

IN Russian Federation The market for stoves and fireplaces continues to develop and new products and materials go on sale every year. Each manufacturer pulls the blanket over itself, claiming that its product is the best, unique and effective. Sellers without practical experience, detailed questions are answered with memorized answers from sales training. The consumer, if he still decides not to contact specialists, will have to spend a lot of effort and time studying all the nuances.

The most important aspect in the operation of fireplaces and stoves is fire safety. This is exactly the case when the desire to save money or simple negligence together with ignorance can lead to big trouble. Main structural element, which is responsible for safety, is high-temperature thermal insulation.

Theoretically, you can do the installation yourself, but since we are talking about human lives, it is better to entrust this work to specialists. There are many companies on the construction services market that are capable of performing such a service efficiently, but the choice of contractor should also be approached with the utmost rigor - the company must have been on the market for a long time and have an excellent reputation. You shouldn’t involve migrant workers and coven workers; there will be no one to ask.

Requirements for thermal insulation materials

At its core, a fireplace is the same stove with an open firebox and chimney, equipped with decorations. Others design features these products do not have, therefore the approach to their installation and equipment is the same. Thermal insulation, accordingly, is carried out separately for the firebox and for the chimney and must meet the following requirements:

• Low thermal conductivity
• Environmental friendliness
• High fire resistance
• Durability
• Maximum permissible temperature heating

The materials must retain the listed properties in full throughout their entire service life.

Classification by composition

High temperature insulating materials are divided into the following types:

1. Stuffed and backfilled: zirconium oxide, quartz sand, various mortars, kaolin. Used mainly in industry, labor-intensive to manufacture
2. Fibrous insulators: fire-resistant wool, felt, felt, are essentially mineral wool and its derivatives. They have the lowest thermal conductivity coefficient, are resistant to thermal shock, but can be susceptible to mechanical damage
3. Solid materials: fire-resistant cardboard, fireclay bricks, fire-resistant ceramic slabs. Retains original shape and can bear mechanical loads

In everyday life, the fireboxes of stoves and fireplaces, as well as metal and asbestos-cement chimneys, are insulated mainly with mineral wool. Brick chimneys are insulated hard materials with cladding, or simply perform three layers of plaster.

Overview of the thermal insulation materials market

Thanks to the attractive price and high availability is the most popular product in the field of application in question. Composition - 100% stone (gabbro-basalt) wool. Available in two types: uncoated and with aluminum foil on one side. The maximum permissible temperature on the foil side is +500°C, on the cotton side +750°C. Slab size 1000*600*30 mm, density 100 kg/m3.

The thermal conductivity coefficient at +300°C is 0.088 W/m*K. The option without foil is not flammable, with foil the flammability class is G1. When choosing this material, it is very important to calculate the peak temperature of the firebox, since if it overheats, the foil may peel off and spread throughout the room. bad smell together with microparticles of cotton wool fibers. Insulator slabs are highly flexible and therefore are mounted in a rigid metal frame.

Vermiculite

A natural mineral from the hydromica group, the layered structure of which forms multi-colored threads when heated. Fire retardant materials are produced from it by pressing. In addition to fireboxes, it is used in the aviation and automotive industries, as well as in nuclear energy as a reflector and absorber of gamma radiation. The material is presented in two products on the market:

• VermixFireproof. Country of origin - Russia, thermal conductivity coefficient at +300°C - 0.18 W/m*K, plate size 600*600*30 mm, density 300 kg/m3, permissible temperature +800°C. Among the advantages are ease of processing and installation; a rigid frame is not required. There are also disadvantages - the material is afraid of moisture.
• Skamolex is a vermiculite thermal insulator imported from Denmark. It is a symbiosis of refractory and decorative panel with various design solutions. Thermal conductivity at +200°C is 0.16 W/m*K, plate size 1000*610*25 mm, density 600 kg/m3, peak temperature +1100°C. Advantages: does not require follow-up finishing- according to the “set it and forget it” principle, it is used for lining fireboxes. Of the minuses - high price, depending on the region of the Russian Federation, the price of a slab may be 5 times higher than a slab of the same area Vermix Ogneupor.

Based on calcium silicate

The next row of thermal insulators is calcium silicate - inorganic substance in the form of calcium salt and metasilicic acid. The mineral is presented on the market in the following versions:

1. Silca 250km. Imported from Germany. Slabs measuring 1000*625*40 are designed for use in stoves, fireplaces and brick chimneys. Density 250 kg/m3, thermal conductivity coefficient 0.09 W/m*K at +200°C, application temperature +1100°C. The structure of the board is not fibrous, it can act as both an insulator and a facing material, and is absolutely harmless to human health. Installation features metal carcass is not executed. Suitable for thermal insulation of wooden walls in places where the firebox is installed.
2. Promasil 950 ks is another product from Germany with a size of 1000*500*30 mm and a density of 245 kg/m3. Peak load is 900°C, thermal conductivity at +200°C is 0.10 W/m*K, which is insignificantly inferior to the previous insulator at half the cost. It is easy to install without a frame, the manufacturer guarantees environmental safety. The material is relatively new, there are very few practical reviews on its use and it confuses construction specialists low price compared to analogues.
3. Scamotec 225 - sample from Denmark. Plate size 1000*610*30 mm, thermal conductivity coefficient 0.08 at +200°C, Maximum temperature applications +1000°C, easy to install without a frame, harmless to health, combines thermal insulation and decorative qualities, it can be coated with any fire-resistant paint. The cost is in the middle price segment.
4. Isolrath 1000. Country of origin - Austria. Size 1000*610*30 mm, density 240 kg/m3, thermal conductivity 0.06 W/m*K at +200°C. Working temperature up to +900°C, a frame for installation is also not needed. The manufacturer guarantees environmental and fire safety against the backdrop of high structural strength. It also belongs to the middle price segment.

Another group of thermal insulators is represented by a single cement-based material. Minerite LV is imported from Denmark. The product size is 1200 * 630 * 9 mm, density is 1150 kg/m3, that is, the material is quite heavy, but thin - it saves useful living space. The thermal conductivity coefficient is 0.25 W/m*K, which is significantly inferior to the previously considered samples.

The application temperature for Minerit LV is up to +150°C. It is an easily accessible material due to its low cost. Based on the parameters, it can be used as additional element in an already thermally insulated firebox of a fireplace or stove, or in highly specialized products.

The most important factor determining the choice of thermal insulation for fireboxes is correct calculation peak temperature. The temperature depends on the type of fuel, the volume of the firebox and other parameters, so determining this key parameter It's better to trust a specialist.

Fireplace fireplace in the house it is not only part of the decor, giving the entire home an additional touch of comfort, but good source warmth in the cold season. Therefore, in order for his work to be most effective and at the same time comply with all necessary measures against fire safety, a fireplace in the house must not only be installed correctly, but also completed thermal insulation.

All fireplaces, regardless of the manner of execution and design, have almost the same design. First of all, this is a U-shaped portal, which has a mantelpiece and is more of a decorative part, emphasizing appearance. Then the firebox, in which direct combustion occurs. Most often they are purchased ready-made, but some owners prefer open ones. own production. The design of the fireplace also includes a chimney, through which harmful combustion products are removed, and a decompression chamber.

Since the fireplace is a source of high heat, it should be remembered that the materials used in its construction are thermal insulation, must have sufficient heat resistance, be non-flammable and have long term operation under conditions of large temperature differences. The ideal material for this is stone wool, which today is presented on the building materials market from various manufacturing companies. Usually for fireplace insulation stone wool with a density of at least 100 kg/m³ is used.

It is produced in the form of plates with aluminum foil applied to one side.

Despite the fact that the function stone wool consists of thermal insulation; its incorrect installation can nullify all the work. For example, if the fireplace is installed near external wall premises, then the thermal insulation layer will allow it to heat the room and not the street. When placing a fireplace near the interior ceiling, a layer of heat insulator will protect the wall from overheating.

Before you start installation work, you should accurately calculate the number of required slabs and, if necessary, cut them to size. This will save time in the future and minimize the cost of necessary materials.

Direct installation of stone wool slabs is carried out on special glue, resistant to high temperatures. The slabs should be placed with foil inside the box. The boards should be tightly fitted to each other, after which the gaps should be closed with self-adhesive aluminum tape.

It's important to know that thermal insulation the layer must also be performed on existing stone or wooden elements boxes, this will further preserve their integrity during the operation of the fireplace.

After the box is insulated, you can begin installing the firebox. It should be remembered that the space between it and the wall must have good ventilation, so you should leave a gap of about five centimeters, after which you need to install the plates between the metal guides as well.

Fireplace top protection

Upon completion of work on thermal insulation After installing the firebox, you can begin arranging the upper part of the fireplace. First of all from metal profiles a rack is made into which stone wool slabs are placed. Then the entire structure is usually covered with plasterboard slabs.

To avoid unwanted heat loss, as well as to improve fire safety where the chimney pipe crosses the ceiling in the upper part of the duct, a decompression chamber should be installed. To do this, simply place the stone wool slab horizontally. In order to improve the circulation of warm air through the chamber, two ventilation grilles should be installed in its wall.

Organization of chimney insulation

In all combustion products, and with them some of the hot air, the temperature of which can reach 500 degrees, is removed from the firebox through the chimney, which means it also needs to be properly insulated using stone wool.

Another option thermal insulation consists of placing the chimney pipe in a metal casing with an asbestos-cement lining and mineral wool insulation. The place where the pipe exits to the roof must also be additionally waterproofed, protecting the junction and the attic space from exposure to precipitation. If the chimney is made of brick, then it should be thermally insulated using stone wool.

Application modern materials during the construction of a fireplace in the future will significantly increase its efficiency. In this case, it is necessary to strictly follow the rules fire safety during operation of the fireplace, monitoring the presence of draft and controlling the source of fire. This condition must be strictly observed for both fireplaces with open and closed fireboxes.

Video: Installation of a heat insulator in a fireplace

This section of the site presents modern, high-tech insulation for fireplaces and stoves.

High Temperature Insulation for Home Furnaces

High temperature insulation for furnaces offers comprehensive protection for this heating device, which provides both its insulation from the walls of the house and the protection of the surface facing the inside of the room, including ensuring the safety of people inside the building.

In this section of the catalog of our website you will find various stoves. All of them are distinguished by very high temperature resistance, are easy to process and install, and can reliably protect surrounding areas from high temperatures. But the main thing is that such slabs as, etc. allow you to significantly save on finishing, since they are completely ready to be applied to them. Decoration Materials- be it paint, tiles, etc.

Each fire-resistant material for stoves presented in our catalog is a modern, high-quality product, which, in addition to fire protection, also ensures the resistance of the heating device to mechanical, chemical and other types of damage.

Of course, refractory materials for lining furnaces are used not only in domestic construction, but also for processing industrial furnaces.

Thermal insulation of fireplace insert

Another important issue for the builder is to buy thermal insulation for fireplaces.

For a fireplace, they are similar in principle to the materials discussed above. The fireplace is similarly treated with slabs on all sides to protect the room from fire and high temperatures. And again - all the advantages are obvious - ease of installation, no need for any preparation for finishing, high-quality execution their functions.

Thermal insulation of sauna stoves

The stoves in the baths deserve special attention. As the most popular insulation material sauna stoves, felt is used - it's cheap, but efficient material: it does not burn, but smolders, emitting a characteristic odor, which often becomes a signal of a fire.

High-quality thermal insulation for stoves and fireplaces also includes insulation of chimneys and pipes, which is responsible for the safety of the building and the durability of the chimney. Most often, varieties are used for insulation. More detailed information and pipes you will find in the corresponding section of our website.

The basis of the device of the majority modern fireplaces and stoves - metal firebox and chimney. And the role of a spectacular decoration is played by the outer duct and chimney. Let's talk about materials that will protect these and other structures located in close proximity to hot surfaces.

A fireplace is an indoor stove with a wide open firebox and a straight chimney. It is curious that initially it not only performed heating functions, but also effectively ventilated the premises. However, even today most consumers do not consider the fireplace as the main heating equipment. Rather, it is perceived as an element interior decoration living room or office, serving to effectively frame the fire.

The heat generator in popular types of fireplaces is a metal firebox like a potbelly stove and a pipe coming out of it. This simple device can become an accent element of the interior - just build a decorative portal and box around it, which can imitate a brick or masonry and chimney. One of the most simple ways box design - frame made of metal profiles covered with plasterboard.

We isolate heat

In solid fuel fireplaces, the temperature of gases removed from the fireplace does not exceed 400-450 °C. Temperature inside decorative design(box) is noticeably smaller, but can reach 100 °C. And this circumstance must not be overlooked. So as not to damage the drywall. prevent it from overheating, and also so that, in turn, it does not heat up and deteriorate finishing(plaster, paint, etc.). An insulation circuit is installed inside the decorative Noro-6a. It provides reliable heat insulation (the external parts of the fireplace can be touched without fear), and warm air from the inside of the box it enters the room through the holes provided for this purpose. Besides, non-combustible insulation plays the role of an additional fire screen. For example, if a fragment of a pipe connection burns out and fiery sparks come out of the combustion chamber (which, by the way, often happens when the rules for operating fireplaces are violated and the firebox is constantly overfilled) or in any other place, the finishing materials will not ignite.

If the fireplace is supposed to be installed near a wall or in the corner of the room, then thermal insulation boards are also installed on all adjacent surfaces. They will protect the structure of the house from overheating, accidental sparks and ignition. At the same time large quantity hot air will be retained inside the firebox and then distributed throughout the room, increasing the efficiency of the fireplace.

Thermal insulation of the fireplace - avoid overheating!

To insulate fireplaces, highly specialized materials made from stone wool in the form of slabs, say, are most often used. Fire Batts (Rockwool), price 1 pack. (8 pcs. size 1000 x 600 x 30 mm) - from 2760 rub.; PS17 (Ragos), price 1 pack. (7 pcs. 1200 x 600 x x 30 mm) - 1930 rub.; “TECHNO T 80” (“Tech-noNIKOL”), price 1 pack. (6 pcs. size 1200 x 600 x 50 mm) - 3580 rub. Their main feature- wide range of operating temperatures: from -180 to +750 °C. They produce two types of slabs: regular and covered on one side with reinforced aluminum foil, glued

special heat-resistant glue. The foil layer increases thermal insulation properties structures due to the reflection of radiant heat.

If you choose the right material, when arranging fireplace area follow the recommendations of fireplace manufacturers and insulating materials, and during operation adhere to basic safety measures (do not leave a working fireplace unattended, do not place flammable objects near it), then you for a long time You will enjoy the warmth of a living and safe fire.

Warmth or heat insulation?

Many private developers often overlook the fact that the product line of each major stone wool thermal insulation manufacturer includes materials for different purposes.

Despite their external similarity, they have a different composition of raw materials and have different characteristics.

If for general building insulation the operating temperature range varies from approximately -50 to +100 ° C, then specialized products, say, intended for work in high-temperature environments (in close proximity to fireplaces, stoves, heating equipment), are designed for other loads, and the temperature of the insulated their surfaces can vary from -180 to +750 “C. The choice of such materials should be approached more thoughtfully, since conventional insulation elevated temperatures will be ineffective.

On a note:

There are two types of specialized high-temperature thermal insulation boards: without foil and with aluminum foil glued on one side with a special heat-resistant adhesive. The maximum permissible temperature on the foil side is 500 °C, on the stone wool side - 750 °C. In order not to deteriorate the properties of the product, the packaging should be stored indoors or under a canopy (horizontally, on a dry flat surface), covered with polyethylene.

The stone doesn't burn

Stone wool is made from non-flammable raw materials - rocks gabbro-basalt group with the addition of a small amount of binder to give shape, and in high-temperature insulation there is very little of it (less than 2% by mass fraction).

The thin fibers of this heat-insulating material can withstand temperatures up to 1000 °C without melting; they are not damaged, remain connected to each other, retain their strength, shape and do not collapse in the absence of mechanical stress on the material.

Stone wool products are classified as non-flammable building materials(NG according to GOST 302W), which are used both in low-rise cottages and in high-rise buildings. In addition, in the event of a fire, such thermal insulation delays the destruction process for some time. load-bearing structures building.

Since the operation of the fireplace and its chimney is related to the combustion process and high temperatures, then their installation requires an extremely careful and balanced approach. There is SP 7.13130.2013 “Heating, ventilation and air conditioning. Fire Safety Requirements”, which clearly outlines the principles of constructing furnace chimneys, penetrations and installation of insulation from the point of view of fire safety. Ignoring these rules can lead to very sad consequences.

Based on our practice, the majority of private owners whose bathhouse or cottage burned down installed a fireplace or stove on their own and violated the rules for installing a chimney through the ceiling or did not maintain the fire-prevention distance between the heating equipment and the wall, although this parameter is indicated in the installation instructions.

Practical advice on fireplace insulation

To increase the fire safety of the ceiling that the chimney crosses, a decompression chamber is installed by horizontally installing a heat-insulating slab. It is advisable to provide two ventilation grates: one is for cooling the decompression chamber, and through the other, warm air will spread throughout the room. Drywall sheets are attached to the metal guides using self-tapping screws. They will become the basis for decorative finishing fireplace

Fireplace insulation diagram

1. Chamber cooling hole
2. Decompression chamber
3. Ventilation grill
4. High temperature stone wool slabs
5. Box made of plasterboard slabs
6. Chimney
7. Firebox body

Do-it-yourself fireplace insulation

Installation of Fire Batts when installing a fireplace - photo

First they prepare required amount thermal insulation boards, and their size must correspond to the dimensions of the fireplace insert (a). Heat-resistant cement-based mineral adhesive is applied pointwise to the slabs; if the insulation is foil, then to its non-foil surface (6). Then the slabs are glued to the wall (c). The joints of foil insulation are protected by heat-resistant aluminum tape(G).

A fireplace insert with decorative portal, leaving between the latter and the insulation layer air gap not less than 4 cm (d). After this, metal guides are mounted above the decorative portal and thermal insulation slabs are also installed between them (e)

10/15/25 g Mystical tricks Colored Fire flame sachets fireplace...

Installing a stove is a complex process and requires a lot of attention to each stage, from preparing the installation site to the nuances of removing the chimney pipe from the roof. In this article we will talk about how to properly insulate wooden wall from steel, cast iron stove. Any wood has a predisposition to ignition, so a constantly hot stove design can easily cause a fire. Any builder understands that insulating the wooden wall behind the stove is a mandatory process. Let's look at an example of installing a Bavaria stove-fireplace on a wooden floor next to wooden wall. The stove does not have separate foundation, so a lightweight base is required metal structure. The base for the stove will be laid out with bricks in one layer. In this case, wall insulation can be done in two versions: asbestos cement sheets or flame sheets (non-hot composition). There are several opinions about asbestos - sometimes they say that they emit toxic fumes. But flames have their drawbacks: they have standard sizes sheets 600x1200 mm, which can be inconvenient when working, and also in price they do not beat asbestos cement at all.

Options for wall insulation

The width of a particular oven is 720 mm. As a result, it turns out that horizontal sheets need to be installed - you will need four sheets to the ceiling, it turns out that they can cover the upper part of the room - there is a beautiful partition there. There are several other options on how to proceed: get rid of the existing partition, replace it with a fireproof one and cover it with tiles or stone. You can also place the screen and circular saw remove the wood on the partition completely. Next, finish with tiles, plaster or paint. There is no doubt that the tree needs to be removed. After all, if you close it from above non-flammable materials, there is still a possibility of ignition wooden surface. In this case, it is better not to take risks and remove the partition from wood. Thermal radiation from the stove there will be not only back wall. Lateral radiation will also emit radiation onto the wall at a distance of 0.8-1 meter. You should carefully read the installation instructions - the manufacturer describes everything very clearly there, including what concerns safety. For example, when a stove with a glass door is on, and there is a chair next to it, it is better to move it further away (more than 1 meter).

Initially, the base for the stove was supposed to be one brick thick, but such a thickness for a wooden floor is not very good. Regarding the non-combustible partition, you should also note the importance of the situation - where the chimney will go, at what distance from the beams, walls and rafters. In the area of ​​this furnace, “Bavaria” is best used as a base. concrete slab- laying it along the beams, flush with the floors or a little more - it will turn out like a podium, reliable and ensuring safety. However, the bottom of this stove practically does not warm up, there is additional part under the firewood, which takes on the heat. Therefore, you can make it simpler - lay mineralite or DSP on the floor, then tiles or porcelain tiles on mastic or hot melt adhesive. Where the chimney pipe is laid, you can use basalt, non-combustible or kaolin wool. Vata plays the role of additional insulation and is embedded in ceiling cutting. In this case, you should make an opening in the ceiling - in accordance with safety standards - from the contour of the two-layer pipe - sandwich, 250 mm in different sides. The furnace cutting should be made of non-combustible materials - superizol, mineralite, calcium silicate, vermiculite. When passing through a chimney pipe, the groove should be filled with cotton wool.

Get rid of beautiful partition, of course, it is very difficult, because it was built for aesthetics, a lot of time was spent on it, but if it was decided to install a metal stove against this wall, then you should get rid of the additional threat of fire of wooden parts.

Wall insulation material

Facing materials are often made of cement, the complete hardening of which can take several years. As a result, even after the work has been completed, changes in size, bends and deflections may be observed. Some manufacturing companies (for example, the Nitiha company) use effective and effective method holding facing materials in an autoclave in a high temperature oven high pressure. And it turns out that shrinkage due to drying and expansion by exposure to heat can be avoided, and reliable strength is also ensured.

Those same Nitikha panels are made from fiber cement, universal material, which consists of 90% cement and 10% fibers of cellulose material and various mineral fillers. Will be used in in this case asbestos-free technology by pressing ingredients.

Panels of this type are environmentally friendly; their production does not use formaldehyde resins, chlorine compounds or asbestos. Fiber cement has excellent fire-resistant properties; it fully fits into the category of non-combustible materials. Fiber cement siding has many advantages, including - with its help you can easily select various variations design, and it is also easy to install. Instead of mineralite, you can also use glass magnetic sheets - this is a more budget option.

Examples of thermal insulation of a wooden wall

Here's another example of making a fire-resistant wall located behind the fireplace:

• treating the wall with fire protection (about 5 layers);
• fireproof mats are attached with a stapler;
• The plates are attached through ceramic bushings - there are gaps at the bottom and top.

Available in stock decorative panels are slightly flammable fire classification. It turns out that only a 5 mm layer of basalt cardboard really protects the wall from fire. However, the oven is convection in nature and its outer surface does not heat up much. If you follow the manufacturer's instructions, it will not heat up more than 60 degrees. But you can't help but worry about safety. For example, even in summer it is worth measuring the temperature on the façade of the stove on the south side outer surface, and its meaning may surprise you.

You can pay attention to the color of the first mono-pipe; the most furnace heat emanates from it. From the floor to the sandwich pipe, reliably cover the wall with super insulation, especially since the stove is installed close to wooden partition. In this case, when thermally insulating the partition, you should also pay attention to the cutting.

You also need to be careful about fiber cement boards; they come in two types: moisture-resistant for the façade and for landscaping fire-resistant partitions (the second option has grey colour, no paint or drawing).

Minerite panels, painted with acrylic (sometimes even in several layers, 5-6), belong to the category of low flammability and low combustion support. Because of the acrylic, the entire slab cannot be classified as “non-flammable”, and this is very bad; such panels, supposedly resistant to fire, are often used just when it is necessary to insulate wooden walls behind the stove - mineralite panels coated with acrylic look It’s beautiful, but, unfortunately, it won’t reliably save you from a fire.

If it suddenly turns out that you bought mineralite coated with acrylic, then you need to get rid of such “protection” of the wall. You should dismantle the panels - this is not difficult, in their place you glue gray classic mineralite onto a galvanized profile, and then terracotta tiles are glued onto it using heat-resistant tile adhesive. With such reliable thermal insulation you can sleep peacefully.

It also happens that gypsum board is used as protection. If the gypsum board is not protected by anything, then it will not play the role of high-quality thermal insulation. If the gypsum board is fixed to the wood with a metal profile, and the gypsum board is attached on top tile, then protection of such a plan takes place. Bare gypsum board should not be used for such purposes; its flammability class is G1, not NG (non-flammable). When installing, it is necessary to take into account the distance from the stove to the wall.

When the oven is operating in normal mode nothing should happen anyway. But the fire safety measures specified in the stove manufacturer’s passport must be observed. The distances to fireproof and combustible structures are clearly stated there. Gypsum is a good heat insulator, but its features should be taken into account. If the wall is wooden and gypsum board is attached close to it, therefore, when it is heated, dampness will form behind it, since the wall is cold. The wall itself also shakes - the tree always lives its own life at different humidity levels and temperature fluctuations in environment. A profile is necessary not only for creating behind it air channel ventilation, but also for the durability of the entire structure. The tile adhesive needed here is one that is suitable for heated floors.

It is imperative to take into account fire safety standards when installing important distances. If you calculate the distance from the metal firebox to the wall, then it is more logical to add another 65 mm to such offsets - this is the thickness of the brick, which any metal stove does not have.

It turns out that the open setback to the unprotected wooden part is 320 mm (+65 mm), resulting in 385 mm - this is the minimum value.

To the protected wooden part 260 mm (+65 mm), and a minimum of 325 mm is obtained.

WITH metal chimney things are much simpler. A sandwich with 50 mm insulation is already approaching the edge-on distance of a brick, that is, when passing the floor between the floors of such a pipe and without filling the foam with non-combustible materials and completely open for control, the following important distances must be maintained (from the outer wall of such a pipe):

To an unprotected wooden wall 320 mm (+ 15 mm), resulting in a minimum of 335 mm.

To a protected wooden wall 260 mm (+ 15 mm), resulting in a minimum of 275 mm.

Until unprotected wood panel 500 mm from smoke minimum;

Minimum distance from smoke to a protected wooden panel of 380 mm. That is, with a sandwich insulation thickness of 50 mm - 330 mm from the outer contour to the protected joist. As for the roof passage, the distance of 130 mm to the sheathing and rafters is taken into account from the wall brick chimney at 120 mm. That is, from the smoke to the protected sheathing and rafters there should be a minimum of 250 mm.

The simplest option for protecting wood is basalt cardboard and a metal sheet.