Selection and installation of a sandwich dummage

The choice and installation of a sandwich dummage is crucial for roofing in terms of both functionality and durability. A sandwich panel, also called a sandwich dummage, is made up of two layers of metal, usually aluminum or steel, with a core material sandwiched in between. Because of its superior thermal insulation and structural support, this design is widely used for roofs in a variety of climates and environments.

Picking the best sandwich dummage depends on a number of variables. Take into account the local climate before installing the roof. In colder climates, panels with higher thermal resistance are best for preserving interior warmth, while in warmer climates, panels with good heat reflection qualities are good for cutting down on cooling expenses.

For sandwich dummage to operate properly and last a long time, installation must be done carefully. Make sure the roof surface is smooth and clean before starting any preparations. In order to stop water infiltration, which over time can weaken the insulation and structural integrity, joints and edges must be sealed properly.

A crucial component of installation involves guaranteeing sufficient support for the panels. The panels’ weight as well as any additional loads—such as snow in the winter or equipment placed on the roof—must be supported by the roof structure. To avoid sagging and guarantee even load distribution, panels must be spaced and fastened correctly.

Selection of sandwich dummage	Consider the roof load capacity and insulation needs when choosing the sandwich dummage material.
Installation of sandwich dummage	Ensure proper alignment and secure fastening to support the roof panels effectively.

Features of the chimney "Sandwich"

This design is modular, meaning it can be put together using a number of different components. Each of them is a stainless steel pipe or other element that has been wrapped in stone wool for thermal insulation and covered in a less expensive, protective decorative casing made of galvanized steel or another type of stainless steel. Stone cotton wool’s non-combustibility and lack of toxic fumes when heated make it an excellent choice for a heater. The midwife stamps weigh approximately 200 kg/m 3.

You can join the pieces using the "in the bell" method because one side of the inside is slightly disassembled.

The sandwich dummage has the following advantages:

1. Small weight. Because of this, there is no need to build a foundation.
2. High speed and simplicity of the installation process. This is due to the fact that the parts performed in the factory are perfectly fitted to each other, so their docking is carried out without difficulties. Also, you will not have to waste time on insulation, because all parts of the chimney are equipped with a heater at the production stage.
3. "Representative" appearance. It is clear that as any item made in the factory, outwardly, a sandwich dizard cannot be compared with home-made analogues.
4. Universality. Whatever the configuration and complexity of the planned chimney, in the existing assortment you can find all the parts necessary for its assembly. Manufacturers produce not only pipes, taps and tees, but also fasteners, nodes for crossing the ceilings and walls, accessories, deflectors with sparking and pr. In the model range there are sets of parts not only with different diameters of the inside – from 100 to 300 mm, but also with different thicknesses of thermal insulation – from 25 to 100 mm. Thus, you can choose a kit for both internal and external laying.

Sandwich dummies also have outstanding technical qualities.

• All elements have a round cross section, which is perfect for a smoke excess channel. If vortices form in the corners of the rectangular profile that prevent the movement of smoke, then there are no such phenomena in the round;
• The walls of the inside are very smooth, due to which they are weakly overgrown with soot and do not interfere with condensate drainage;
• Steel does not absorb condensate and, thanks to alloying additives, shows resistance to the action of the acid in it;
• A thin steel pipe warms up quickly, which reduces the volume of condensate formation at the time of the kind of kindle to a minimum.

Let’s talk about the shortcomings now. A prospective purchaser needs to be aware of the following:

• The sandwich dizard is quite expensive;
• At the same time, his resource is completely unprofitable: the service life is only 10-15 years.

Choosing a sandwich pipe

The following factors are taken into consideration when choosing the chimney assembly kit:

• the material of the inner pipe and the thickness of its wall;
• brand and thickness of isolation;
• the diameter of the smoke -outlet canal;
• the number of modules and their type.

Material and wall thickness of the working (internal) part

It’s critical to realize that various alloy steel types are used in the production of sandwich dummies, and that some alloys that perform well in one set of circumstances may prove unstable and brittle in another. The temperature of the heat generator’s exhaust is the primary factor that needs to be considered. Boilers powered by gas and diesel are the most "cold," while those powered by solid fuel—especially coal—are the most "hot."

In certain circumstances, the material must also have greater acid resistance. For instance, the formation of large volumes of condensate—a very caustic acid cocktail—is typical of today’s popular combustion furnaces, like "Buleryan," which operate in smoldering mode. The exhaust of plants that run on diesel or other liquid fuel also produces a lot of aggressive acids.

These come from the modular chimneys made of steel:

1. AISI 430: This inexpensive low -alloy steel can only be used for the manufacture of a casing. If the working part is made from it, the chimney will probably be short -lived.
2. AISI 439: The previous one is distinguished by the presence of titanium. Due to this, the alloy becomes more durable and resistant to corrosion, which allows you to make the working part of the chimneys for low -power gas heat generators from it.
3. AISI 316: The molibden, nickel and titanium available in the composition make this steel acid -resistant and at the same time heat -resistant (up to 800 o). The chimney made from it can be safely equipped with a gas boiler regardless of its power. The AISI 316L version is suitable for chimneys of diesel boilers (recommended wall thickness-0.5 mm), and AISI 316TI for gas turbine and gas piston plants (from 1 to 1.5 mm), as well as for diesel generators (also from 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 to 1 , 5 mm).
4. AISI 304: “Budget” analogue of the previous brand. The composition is almost the same, but the share of the alloying elements is reduced – this is ensured by the reduction in the cost. Accordingly, steel is inferior to the AISI 316 brand in resistance to aggressive factors and durability. It is used for the manufacture of gas boilers (thickness – 0.5 mm).
5. AISI 321: Like AISI 316, it is able to withstand high temperatures (up to 800 O C) and is well opposed to the action of acids. It is usually used in chimneys for coil-heater and fireplaces (recommended thickness-from 0.5 to 1 mm), bath furnaces (0.8–1 mm), solid fuel boilers (1 mm), gas turbine and gas piston plants (1–1 , 5 mm).
6. AISI 309 and 310: steel with a very high chromium (about 25%) and nickel (about 20%), which provides increased thermal and acid resistance. Used in chimneys for solid fuel boilers (thickness – 1 mm). The most expensive variety is the steel of the AISI 310S brand. It retains working qualities at temperatures up to 1000 ° C, which makes it suitable for the manufacture of chimneys even the most powerful pyrolysis installations.

Table: Working temperatures for chimney chimney chims from different steel grades

• continuous effect – 925 about C;
• intermittent influences – 850 o C

• continuous effect – 925 about C;
• intermittent influences – 870 o C

• continuous effect – 1150 O C;
• intermittent influences – 1035 o C

The brand of steel used must be disclosed by the responsible manufacturer either through an inscription on the product or in the technical documentation. Should this information not be provided, it is preferable to not purchase.

A magnet can be used to "bring a fake made of ordinary or weakly launched steel to clean water." She will draw him in, but steel that has enough alloying elements in it won’t.

Brand and the thickness of thermal insulation

The condition of the heat-insulating layer has a significant impact on how well the chimney operates. Smoke gases will cause it to cool significantly if it tears or crowns, which will worsen traction. Furthermore, because the heat insulator is hidden behind the casing, it will take some time to realize that it is no longer functional. Consequently, it is preferable to select a sandwich diving from a producer who makes use of reputable brands’ thermal insulation. Rockwool Wired Mat 80, Mat 30, and Paroc Rob 80 T are a few examples of these.

The temperature of the exhaust is considered when choosing the thickness of thermal insulation:

• up to 250 ° C (gas and diesel boilers): 25 mm;
• from 300 to 700 ° C (diesel-generator and gas piston plants, solid fuel heat generators, including wood): 50–100 mm.

The more thick the thermal insulation, the better when the chimney is facing the street.

The diameter of the smoke -sized canal

In most cases, a highly complicated calculation determines the required duct diameter; this is a task best left to an experienced specialist. Numerous factors are connected to it, including the fuel type, installation power, chimney configuration, thickness of thermal insulation, and exhaust temperature. Even when using specialized computer programs, there are still a number of steps involved before you can select a set of parameters that yields an acceptable output (optimal for these types of fuel and traction power).

However, you can use ready-made results for the simplest performance, which is when the chimney is just a vertical pipe that is five meters high or slightly higher:

• With a heat generator power less than 3.5 kW: the inner diameter is 158 mm;
• between 3.5 and 5.2 kW: 189 mm;
• between 5.2 and 7.2 kW: 220 mm;
• between 7.2 and 10.5 kW: 226 mm;
• between 10.5 and 14 kW: 263 mm.

Only in the direction of increase can the indicated diameters be rounded to the standard values from the manufacturer’s proposed dimensional row. The owners of the factory-manufactured heat generators must also keep in mind that using a chimney with a cross-section smaller than an installation pipe for smoke drawing is prohibited.

The number and type of modules

The number of sections (pipes range in length from 0.5 to 1 m) should be chosen so that the pipe meets the requirements listed below:

1. The height of the head over a grate should be at least 5 m.
2. If the roof is covered with combustible material (bitumen tiles, for example), the head of the pipe should be at a distance of at least 1.2 m from it.
3. Above a flat roof with a non -combustible coating, the pipe should rise by 0.5 m.

The height on the gable roof is determined by how far away the skate is:

• up to 1.5 m: 0.5 m above the skate;
• Between 1.5 and 3 m: flush with the skate;
• Further 3 m: the head is below the skate, at the level of the lines drawn through it with a slope to a horizon of 10 about .

The pipe needs to be raised above any buildings or higher extensions where the roof meets their wall. The modules depicted in the figure are the most widely used ones.

Other than pipes (poses. 12 and 19), which might be required:

• adapter connected to the smoke -cutting pipe of the heat generator (pos. 1);
• a tee with a rectangular delive (pos. 3) for switching from a horizontal section to a vertical;
• a tee with oblique tap (pos. 7) for connecting another heat generator to the chimney;
• Divids with an angle of 45 0 (pos. 8) are used if you need to shift the axis of the chimney, for example, to bypass the beam of the ceiling or the rafter leg;
• Divids with an angle of 90 0 (pos. 2) for switching from a vertical section to horizontal;
• Section with a gate damper;
• Revision: section with a hermetically sealed observation window (pos. 4);
• support site (pos. 5 and 6), which includes a section with an inspection and preparation hole and a crane for draining condensate;
• clamps (pos. 10);
• brackets (pos. eleven);
• support brackets for fastening the support sites (poses. 13);
• unloading platform with a passing pipe (pos. 14) assumes part of the weight of the pipe with its significant length;
• Elements for sealing the passage through the roof: conical rat (pos. 16 and 17), a prisoner (metal apron, pos. 18);
• Elements of the head: cone (pos. 20) and the fungus installed on it (pos. 21), Flugar (pos. 22), thermogribok (pos. 23), deflector (pos. 24) or sparking (pos. 25).

The rat is constructed in three performances, each of which corresponds to a different slope angle:

• from 0 to 15 o;
• between 15 and 30 degrees;
• between 30 and 45 degrees.

Assume that you are given the option to select any combination of the following arbitrary choices for the specified parameters when placing an order for a sandwich dummage:

• The brand has become an internal circuit (5 options),
• its thickness (3 options),
• The brand has become an external circuit (3 options),
• Internal diameter (12 options),
• and the thickness of thermal insulation (2 options).

This implies that every component of the chimney, including straight pipes, taps, tees, and nurse.D.s, needs to be listed in a catalog with 1080 distinct variations. The number of positions will be more than 20,000 pieces if there are 19 basic modules.

The existence of an enormous number of positions in the chimneys-Sandwich brand Rosstin catalog confirms this figure. It is clear that only a sizable manufacturer can afford to produce such a vast array of goods and to keep them in stock.

Self-assembly and installation of a sandwich dummage

The following are general guidelines for erecting a flowering structure:

1. The chimney is assembled from the bottom up. A special adapter is put on a smoke -sipping pipe of the heat generator, greased with a special heat -resistant sealant (withstands temperatures up to 1500 ° C). The adapter is fixed using a clamp. The sealant is used only after careful fitting, since it is quite difficult to disassemble the connection processed by this composition.
2. The first pipe segment is connected to the adapter. At an exhaust temperature of more than 200 o, it should be without thermal insulation, otherwise steel will overheat here and quickly burn out.
3. Then a section with a gate damper is usually installed. She, as well as all subsequent ones, should already be in a thermally insulated performance.
4. The heat insulator of the very first element must be closed with a special plug to prevent moisture from entering it (basalt wool loses thermal insulation qualities when wet).

The boiler chimney pipe can be relied upon directly if it is oriented upwards. If he turns his head away, the following is how the horizontal to vertical portion transitions:

1. A support bracket with a special platform is screwed to the wall, which will hold the weight of the chimney.
2. On the site is attached a tee with a rectangular challenge, in which the other two pipe should look up and down. The vertical section of the chimney will “grow” from the upper pipe, horizontal, which goes from the boiler, is connected to the side, and the condensation collection is attached to the lower.

The latter is performed in two sets:

• with the lower location of the drain crane – is used if the tee is fixed high enough;
• with a side location of the crane – applies if the tee of the lower part almost rests on the floor.

To ensure condensate drains in the condensation, all horizontal areas should have a slope of 30 ž toward the smoke. The tower of the tee has a bigger angle than in 90 degrees, so the manufacturer’s bias was taken into consideration.

It’s also important to remember that a chimney with natural thrust cannot have a horizontal area longer than one meter.

The tee will not be required if you use a supporting platform that already has a section with a drain crane and an audit hatch.

Installing supporting brackets requires a 2 m step on the wall and a 1 m step in areas that are horizontal or inclined. Additionally, they must be installed where the direction changes. Clamps are used to secure the chimney to the brackets.

When utilizing complete brackets, the manufacturer’s suggested distance between the wall and the chimney is determined on its own. If adjustable brackets are used, they should be set up so that the pipe’s exterior is 25 centimeters away from the wall.

Installing an additional supporting bracket with an unloading platform is necessary if the pipe is going to be particularly long and should be placed closer to the roof so that some of the weight will fall on it.

Chimney construction can be done in two ways:

1. "By smoke". The bell of the subsequent detail is put on the narrow side of the previous. With this scheme, smoke does not meet any resistance in its path, and its intake in the joint between the details is practically excluded. This explains the name of the method. But condensate, when the gap appears, can seep into the insulation, as a result of which it will lose thermal insulation qualities.
2. "Condensate". Here is the opposite: a narrow part of the subsequent part is inserted into the bell of the previous part. For smoke removal, this method is not very good, but the condensate will drain freely, and its penetration through joints into the insulation is completely excluded.

It is generally advised to assemble horizontal sections "in smoke" and vertical sections "condensate."

The following procedure is followed when connecting the parts:

1. Thermal insulation on the connecting part is shifted along with the casing of 150-200 mm, so that the docking edge of the inside is exposed (it will be more convenient to work).
2. The inside of one of the details in the place of the future connection is lubricated with a heat -resistant sealant in the kit.
3. The narrow side of one part starts in the bell of the other until it stops.
4. The pushed thermal insulation is returned to its place, while the casing of the new element is pulled onto the casing of the previously installed (this connection must also be compacted with sealant).
5. The place where one casing is worn on the other is pulled together with a clamp (there are models with a special lock instead of a bolt).

Observe that the next detail’s casing always approaches the preceding detail’s casing, irrespective of whether the chimney is put together "by smoke" or "condensate." This is done to ensure that water falling on the pipe’s exterior flows freely at it and doesn’t run the risk of seeping into the insulation through joints.

Video: how to assemble a sandwich diving "by smoke" or "condensate"

Crossing the wall and ceilings

The chimney must be removed from its external location by passing through the wall and into the street. If it’s indoors, you’ll have to climb through the ceiling. In both situations, it’s imperative to keep the pipe’s surface away from any potentially flammable building materials. Cutting is the node that is employed in this process.

The following is the cutting:

1. In the wall or overlap, the opening of such a size is performed so that the surface of the pipes passing through it is defended from building structures at a distance of 200 mm (usually 400×400 mm is enough).
2. From the inside, the opening is framed by basalt cardboard (it is also called a minerite).
3. Further, the part specially designed for such tasks is installed – the passing unit (you can purchase in the finished form, but you can do it yourself).
4. A pipe is started in the passage unit, after which the clearance between it and the walls of the block must be filled with basalt cotton wool.
5. On both sides, the opening is sewn by a steel sheet or a special decorative element – a rose that can be ordered when buying a set.

It is simpler to install passing blocks that some manufacturers offer pre-installed with a heat insulator.

Expanded clay is a less expensive heat insulator that can be used to fill the passage block when crossing the ceiling. Since it’s bulk, you must first use a leaf or roset to sew the opening from the bottom.

It should be noted that the chimney must be positioned in the center of the space between the beams when crossing the ceiling from the beams. An aircraft can assist in adjusting the pipe’s position at a 45-degree angle.

The passing unit is not required to cross a non-combustible material wall or ceiling. Installing a sleeve—a section of the asbestos-cement pipe—into the opening is sufficient. After inserting a sandwich pipe, fill the remaining space inside the basalt wool, making sure it encircles the pipe from all sides.

The sandwich pipe joint must be visible and cannot be positioned inside a wall or ceiling.

The intersection of the roof

When a rafter system is in place, the pipe should be placed in the middle of the space between the rafters, just like with ceiling beams. The wooden components need to be wrapped with minerite if they are too near to the pipe.

The following plan is followed when executing the roof crossing:

1. The opening is cut in the roof at the place of passage of the pipe. At the same time, waterproofing and other roller materials must be cut crossily, after which the resulting “petals” are bent and shot to the crate.
2. Next, a section of the chimney crossing the roof is mounted.
3. A rat is put on the pipe, the shape of which, as already mentioned, should correspond to the angle of the slope of the slope.
4. The coverage must be “sewn” to the roof covering, after which a petrier is mounted on top of it – a metal apron. It is screwed to the pipe with a clamp or fixed with a stop screw.
5. If the type of roofing allows, it is necessary to start the upper edge of the support plate under it. If not, the place of adjacent to the plate to the coating must be reliably treated with sealant.

Use the elastic Master Flash cover to more firmly seal the opening through the roof. Because of its inherent elasticity, it covers the pipe tightly, and its "skirt" will precisely fit relief roofing, such as corrugated board or plate. The "skirt" is installed by first lubricating it with sealant, pressing it firmly against the coating, and fastening it with self-tapping screws.

The pipe is then finished to the appropriate height, at which point the head is formed on it by adding a cone, a deflector, or another element. The heads need to have a spark if the chimney-connected heat generator burns solid fuel and the roof coating is composed of flammable material.

Three stretch marks must be used to reinforce any pipe that protrudes more than 1.2 meters above the roof. This is accomplished by fastening stretch marks to the headline using a unique clamp that has three loops. Then, each free end needs to be fastened to a stationary, sturdy component of the roof.

Which sandwich is better: user recommendations

They can declare that the sandwich is genuinely mounted quickly and simply after the chimney has been installed at home. A downside is that a high-quality chimney can be rather expensive, but considering its long lifespan, I’m hoping it will pay for itself over time. Installing it in the sauna took one day, and then there was sealing and checking. Moscow, g. Alexey The URL is septik.GURU/TRUBY/DRUGOE/TRUBA-SENDVICH-Dlya-DYMOHODA.HTML#OTZYVY.

Bring 321 stainless steel inside your chimney to prevent it from burning out; it is unquestionably heat- and acid-resistant. Additionally, there will be sufficient steel with a thickness of 0.5 to 0.8, but the most crucial factor is to focus on the chimney’s production quality (what welding? This is death—an overlap or point. Don’t save money on chimneys; a laser joint in the joint is the best welding for chimneys. St. Petersburg’s arsonist: https://www.forumhouse.ru/Threads/234776/

I offer Craft advice. I have a 140 grams fireplace. C, I’m usually 0.5 thickness int. pipes are appropriate; even an asbestos chamber pipe works well. You have a bathhouse, so 300–400 is the smallest size. I’m envious. In the bathroom, I would also like a Geyser 2014 or an Angara 2012; these appear to be the best consumer goods. Lazukov, Moscow Area www.forumhouse.ru/Threads/234776/

If dependable and capable of withstanding any temperature, including transcendental ones, use coaline cotton wool and Craft ht from AISI 310 S (0.8 mm). If you need painted, Schiedel Permeter (available in white, gray, and black) is a good option for regular operation. If you want to go as cheaply as possible, you can also use "Ferrum" from AISI 439 (0, 8 mm). Telegin, Alexey www.forumhouse.ru/Threads/234776/

Installing and selecting a sandwich dummage for your roof is an important choice that will affect its longevity and functionality. Choosing a sandwich dummage gives you a flexible and effective solution that combines insulation and strength. This system contributes to energy savings over time by strengthening the roof’s structural integrity and improving its thermal efficiency.

Think about things like the load-bearing capacity needed for your particular roof design and the insulation qualities required to satisfy regional building codes and weather conditions when making your selection. By carefully weighing these variables, you can make sure that your sandwich dummage not only satisfies legal requirements but also improves the general comfort and effectiveness of your structure.

As important as installation is making sure your sandwich dummage works. It is strongly advised to work with seasoned experts who are knowledgeable about the subtleties of sandwich dummage installation. They can guarantee correct positioning, strong fastening, and integration with other roofing elements, reducing the possibility of structural problems and extending the life of your roof.

Regular inspections and maintenance are also necessary to extend the lifespan of your sandwich dummage system and roof. By taking quick care of small problems, you can save expensive repairs and keep your roofing structure operating at its best. You’re improving the sustainability and value of your property in addition to protecting it with high-quality materials and expert installation.

In the roofing industry, choosing and putting in a sandwich dummage is essential to guaranteeing longevity and structural integrity. Sandwich dummages play a crucial role in maintaining the roof, particularly in regions that are vulnerable to strong winds or accumulations of snow. This article examines the significance of selecting the proper materials and sandwich dummage dimensions, emphasizing the function of these choices in improving stability and distributing weight. In order to guarantee that the dummage blends in perfectly with the roof structure and promotes longevity and safety, it also covers crucial installation techniques. Having a thorough understanding of these factors enables both homeowners and roofing professionals to make well-informed decisions that safeguard their investments and guarantee the durability of their roofs over time.

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