Heating system for drainage system. Heating of roofs and gutters: system installation technology. In drainpipes
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It is known that flows of rain and melt water can damage the walls and foundation of a building, as well as externally located engineering Communication, if absent . For its reliable operation in any weather, even frosty, experts advise heating the roof and gutters.
How necessary is roof heating?
A similar question is often asked by owners of private households who doubt that heating the gutters is that important. Why is it needed? The fact is that the feature climatic conditions In our country, ice often forms on the roofs of buildings during the cold season. Also, frozen water is in gutters and pipes, preventing water flows from being directed into storm drains during a thaw.
As a result, if there is no heating of the roof and gutters, leaks form, which not only damage the drainage structures, but also destroy the façade of the building, causing irreparable damage to the architectural appearance of the house. But the most important thing is that icicles and blocks of ice falling from roofs pose a serious threat to the lives of pedestrians. Often in winter you can see people with shovels and other tools cleaning the roof, but such work can damage it. After this, the roof will face expensive repairs.
This is why it is necessary to install a de-icing system by installing heating cable for the gutters. Thanks to this, the service life of the roof is increased, structural elements for drainage are not damaged and the façade of the building is not destroyed.
Anti-icing system
Heating the gutters and roof prevents the formation of icing in the form of icicles, ice caps, and snow drifts. The anti-icing system (see photo) is mounted on finished roof, and it operates in automatic mode: it turns on when there is a need to clear snow and ice and then turns off.
To create it, a cable is used for heating gutters, which is reliable, resistant to precipitation, temperature changes, and ultraviolet radiation.
Design features of the heating control system
When creating a roofing project, they usually try to take into account the likelihood of load from precipitation. If such calculations are carried out incorrectly, the entire structure may collapse. Some winters have more snow than usual. In order not to suffer from this, you will need to install heated gutters.
Why does ice accumulate?
The reasons for the appearance of ice relate to external and internal factors:
- Frequent temperature changes. This leads to the fact that a layer of snow that was already lying could melt, after the temperature dropped, it froze and was covered by the next one.
- Failure to comply with the roof slope angle. It must be calculated in accordance with the climatic characteristics of a particular territory.
- Uncleaned drain channels. IN autumn period The gutters could be filled with leaves. It clogs the holes, which prevents water from flowing out.
- Insufficient insulation of the attic space.
- Availability of attic space. Using attic space steam is released as a living space, in addition, this leads to an increase in the temperature of the flooring. This causes the snow to melt and the water to freeze in the cold.
- Irregular roof cleaning.
The heating system for gutters is usually installed in conjunction with the heating of certain areas of the roof. A device of this type faces the following tasks:
- Removing icicles and frozen deposits on the roof.
- Preventing rot roofing due to moisture accumulation.
- Clearing holes from blockages to allow fluid to pass through.
- Prevent sudden temperature changes that can damage some materials.
- Reducing the weight of the overlying sediment layer to reduce the load.
- Extending the service life of the deck and the entire rafter system.
- Automation of roof cleaning.
Operating principle of the heating system
The heating system operates in automatic mode. Virtually no user intervention is required. This is ensured by the fact that the design provides for the presence of a special sensor that continuously receives temperature data environment. It transmits a signal to the regulator, which closes the supply circuit electric current and already heating elements come into effect by warming up a layer of snow cover or ice.
If necessary, activation can be done manually; usually an additional switch is provided for this.
Selecting the type of heating cable
The basis of the entire mechanism is the heating cable. For some, this concept is something new, but in fact, such solutions have been used for more than one year.
Resistive. By appearance it resembles an ordinary single-core or stranded aluminum cable in a braid. Heating occurs due to internal resistance conductor. The temperature is easily maintained at the same level, which guarantees system reliability. It is usually in an affordable price range.
Self-regulating. The structure of this conductor is more complex, and its cost is also higher. As the name suggests, this cable can function autonomously without user intervention. This means that in different areas there may be different temperatures. This is explained by the following mechanism: between the two cores there is an insulator, which to a certain extent transmits electrical energy. The lower the temperature, the lower the resistance, the more current flows, and the more heating occurs. After warming up, the resistance increases and the permeability decreases.
Each of these options has its own strengths and weaknesses. Resistive:
- fast heating;
- ease of installation of a two-core cable;
- ease of power calculation linear meter;
- There are no special nuances with the connection.
The disadvantages include:
- the need to lay a specific declared length;
- excessive consumption of electricity in uneven areas;
- Only resistance measurement is available as a pre-installation check.
The advantages of self-regulating include:
- Possibility of use without a thermostat;
- installation of a piece of arbitrary length;
- resistance to physical impact;
- more economical consumption compared to resistive;
- resistance to voltage surges;
Some cons:
- relatively high price;
- slow warm-up;
- high starting power.
In some situations, these two types are combined to save money. For example, along the roof slope, where the cover of snow or ice is approximately the same, a resistive cable is run, and a self-regulating cable is laid in gutters, drains and funnels.
Design
In addition to the heating base itself, you will also need some components:
- Temperature sensor. The best option would be a small weather station. It will be able to track not only temperature, but also humidity, as well as precipitation levels.
- Thermostat. For such purposes, preference is given to an electronic product. It tracks vibrations more accurately and can withstand sufficient loads.
- Cold cable. Usually taken in double braid. It will serve as a power supply for connecting the load. The cross section is selected depending on the total consumption of the system.
- Signal cables. Used for temperature and humidity sensors.
- Circuit breaker. The number of poles will depend on the incoming network.
- Mounting boxes. One will be needed for the thermostat, one for the machine if it is not installed in a common panel, and one more for the weather station.
- RCD. Required element. This device will allow you to monitor the slightest leaks and immediately stop the flow of electric current to protect all residents of the house.
- Couplings for hermetically sealed cable connections. Fastening material in the form of screws, dowels, wire staples.
Now you need to calculate how long the heating cable will be required. To do this, you need to measure the length of all horizontal and vertical sections. Usually two threads are laid in the gutter, so the result must be multiplied by two. For a vertical drainpipe there are also two, but it is important to additionally insulate the lower part, since it is closer to the ground and can freeze more strongly. About 10% of the reserve should be added to the resulting result. It will take him to make additional turns in the funnels. The length of the section that will be on the roof depends on which installation method is chosen. It can be done in several threads or with a snake. The height of the snake loop is selected according to the pattern of the laid flooring, but it should not be less than the width at which ice usually forms (on average, this value reaches 35-40 cm). If there is one on the roof internal corner(valley), then the heating cable must also be laid in it. Its minimum is needed for ⅔ of its length in two lines.
The cable power for each specific case is calculated individually, but there are several average values:
- Under normal conditions, the starting point is 22 W for resistive and 30 W for self-regulating cable per 1 linear meter.
- For soft roof and plastic drains, the power per linear meter should not exceed 17 W.
- If heavy icing is possible for a metal gutter, it is allowed to use two threads with a power of 50 W per linear meter.
- With a large groove width, not two, but three or more lines can be laid.
- If the attic is cold, then 70 W/m2 is enough. In the case when the attic is used as an attic, then the number of turns and lines is calculated so that it turns out to be 200 W/m2.
Now, knowing the total length of the entire highway and the power of each conductor, you can calculate the total consumption. In accordance with this value, the circuit breaker, cold cable cross-section and thermostat are selected.
Installation
In the case where water flow occurs in storm system, then the cable must be laid in it to the freezing depth. For flat roofs It will be necessary to additionally use special heated funnels, and also lay the cable around the drain holes in the same way as with conventional funnels. Throughout the installation process, ensure that the insulating sheath is not damaged. If this happens, then in the case of a resistive cable the entire line will have to be replaced.
Before purchasing a cable, be sure to read all its characteristics, as well as permissible temperatures its application. At the design stage, it is better to consult with professionals who have been engaged in similar work for some time. In fact, there is nothing in the installation process that you cannot handle yourself.
Video
An option for installing a heating cable for heating gutters is presented in the following video:
IN winter time icing of roofs and the appearance of ice build-ups on eaves are becoming a serious problem. Significant increase snow load on the roof structure can lead to roof damage or even collapse. Ice icicles form on the edges of eaves, which, when falling, pose a significant threat to pedestrians and cars parked next to buildings. In winter, drainage systems designed for drainage of melt and rain water, after alternate thawing during a thaw and subsequent freezing during frost, become so clogged with ice that normal operation becomes impossible. To solve these problems, an innovative technology is used for heating drainpipes and gutters with an electric self-regulating cable, which, due to the automatic operating mode, greatly facilitates winter care behind the gutters
Collapse eaves overhang under the destructive effects of snow and ice
Winter heating technology
The operating principle of this technology is based on heating gutters and drainpipes with a heating electric cable laid in the roof structure, through drainage pipes, drainage gutters, inlet funnels and other places where ice and snow accumulate. The heating cable, equipped with an automatic temperature switch, highlights required amount heat that can cause ice and snow to melt.
Gutter heating systems “without icicles” perform the following functions:
- Prevents the appearance of ice and prevents the formation of an ice crust.
- Creates normal conditions drainage melted ice and snow along drainpipes and gutters.
- Eliminates the threat of pipe clogging with ice and failure of pipe drains.
- Eliminates the threat of dangerous falling ice and icicles.
- Increases the service life of gutters.
In addition, the heating complex operates in fully automatic mode and does not require manual control.
Scheme of heating gutters and drainage pipes with a heating cable Concept of self-regulating cable
Among all types of special cable products used for heating roof drain pipes and wall gutters, the most effective protection anti-icing is provided by an electric self-regulating wire. In terms of its structural structure, it consists of two conductive cores connected to a special semiconductor matrix, with a photopolymer internal insulation, braided wire or foil, and outer plastic insulation. Two insulating layers provide maximum resistance to mechanical shock external loads and help increase dielectric strength. The main element of a self-regulating wire is a semiconductor matrix, which can convert its electrical energy into thermal energy. Depending on the decrease or increase in winter temperature regime, a change occurs electrical resistance wire, thermal heating of the wire begins, sufficient to defrost the gutter and drain pipe. It is this use of the self-regulation effect that underlies the operating principle of the heating cable.
Self-regulating wire automatically changes the power consumption of electrical energy and regulates the heating temperature .
Structural structure self-regulating cable
The main advantages of a heating cable
The electric self-regulating cable stands out noticeably from its “brothers” due to the following advantages:
- Economical.
- Low power consumption.
- Reliability and durability.
- No risk of overheating or burnout.
- Easy to install.
- The cable can be cut into pieces required length directly at the installation site.
The anti-icing cable system for drains is easy to install and has automatic block control and does not require dismantling in the summer
Disadvantages of heating cable:
- Defrosting drain pipes at low temperatures winter temperatures requires a fairly high starting current.
- Long warm-up period.
- High price.
Heating of drainpipes and gutters with a self-regulating cable
In order to melt the ice cover, in the drainage system the heating wire is placed in the structure of the pipe and the funnels themselves, the site of the main formation of ice. There are several features of laying a self-regulating wire:
- If the diameter of the drain is no more than 100 mm, the cable is laid in one thread.
- To heat gutters with a diameter from 100 mm to 300 mm, you will need to lay two strands of wire.
- At the entrance to the drainage structure, the cable is fixed with steel brackets.
- The upper and lower parts of the drain require enhanced heating. Therefore, it is recommended to additionally lay several turns of wire in the form of a spiral, or the cable is laid in the form of a “dripping” loop.
- In cases where the length of the gutters is more than 3 meters, the cable is secured with strong fasteners in the form of a metal chain or cable, fixed to wooden roof elements.
The power of the self-regulating cable is selected depending on the diameter of the drain.
An example of laying a self-regulating wire in a water inlet funnel Video example of the device winter heating gutters:
The procedure for calculating the power of the heating system
If the owner of a private house is tired of manually cleaning ice from the roof and gutters, and he decides to install a heating system, then the first step towards the intended goal will be the development of a heating project. Actually, cable selection and calculation required power This is done by specialists that every reputable trading organization has. Unfortunately, from time to time there are not very conscientious suppliers who are interested in selling an expensive anti-icing complex and therefore you should not rely entirely on the seller’s honesty. For this reason, it is recommended that you familiarize yourself with general rules calculation and design:
- Drawing up a plan for laying the heating cable. For an insulated roof with a slight slope, the wire is placed around the perimeter and in water intake funnels.
- On flat roofs The cable is laid in areas adjacent to the gutters.
- Roofs with high angle tilt require a slightly different installation pattern. The cable is laid in a zigzag pattern between the edge of the roof and the snow retention structure.
- Where the roof meets the wall and on valleys gable roofs a kind of pocket is formed in which ice constantly forms. In these places, the heating cable is laid in height at a distance equal to 2/3 from the long side of the valley. In places where the roof and wall come into contact, the heating wire is laid in an elongated loop of 10 - 15 cm at a distance of 5 to 8 cm, without reaching the structure to the wall.
- If you need to heat the roof with large slope and without an organized drain, the heating cable is laid in a “dripping” loop. In this case, it is planned to install the cable in a loop so that melt water drips directly from it onto the ground. The dripping loop element increases the consumption of cable products by 50 – 80 mm.
- A heating cable is laid in a single thread in a gutter up to 150 mm wide and inserted in a dripping loop of 300 - 400 mm into the water inlet funnel of the drain.
As mentioned above, the best option for a heating cable is considered to be a self-regulating cable. Since this type of cable product is more expensive and its price ranges from 240 to 660 rubles per 1 meter, it can only be used for heating gutters, and the roof structure can be equipped with a cheaper type of heating wire.
View drainage system heated by electric cable At the next stage, the owner needs to decide on the locations Maintenance, where it will be necessary to install mounting boxes. Most often they are installed on the roof next to the heating cable or somewhere under a canopy or on a parapet fence.
Calculation of the power of an electric heating system
The next step in calculating a “system without icicles” will be to determine the linear and total power consumption. There is a table of approximate power values various types roofs:
Plastic gutters are equipped with a heating cable with a total power of no more than 17 W/m, and for roofs with soft coating The maximum permissible power is 20 W/m.
After determining the estimated power of the heating wire, calculate its required length and the number of cable threads, knowing that maximum length one chain should not exceed 120 - 150 meters. Each circuit is connected to its own UZ0.
At the final stage, a control panel for the entire heating complex is selected.
Laying the self-regulating wire – perfect solution roofs “without icicles” Maintenance
For normal operation of the laid heating self-regulating cable, it is necessary to timely perform the following preventive measures:
- Once a year before the winter season, visually inspect the cable surface for mechanical damage.
- Before starting operation in the cold season, it is necessary to clean the water intake gutters and funnels from leaves, branches and other debris.
- Check the resistance value of the insulating layer.
- Before the cold weather sets in, set up the automatic thermostat.
- Check the RCD.
Preparing a heated gutter for winter use The use of technology for heating gutters with a heating cable can significantly save the home owner’s time on clearing ice and eliminates the possibility of injury due to falling ice icicles. Therefore, the costs of purchasing and installing this entire complex in winter will be completely justified. Of course, equipping gutters with heating is a serious project and for better results of operation it is advisable to participate in the installation by experienced specialists .
During winter thaws and off-season periods, the operation of drainage systems is at risk. Ice forms in gutters and pipes, which can quickly grow and form entire ice plugs. They slow down the drainage system and sometimes block it completely.
In addition, frozen ice increases the weight of gutters, leading to their collapse and rupture. Such consequences can be avoided with the help of anti-icing systems, the main element of which is a heating cable for gutters and roofs.
Let's start with the main concepts. What is a heating cable? It is a current conductor capable of converting electrical energy into thermal energy. The amount of heat generated depends on the strength of the current and the resistance of the conductive material. If you remember the school physics course, it turns out that any conductor has this ability. But! For an electrical cable, a similar thermal effect is n desirable, therefore, due to the design, they try to reduce it. And for the heating cable it’s the other way around. The more heat it can convert from electricity, the better.
In an anti-icing system, the heating cable performs the most important function of heating the gutter and roof elements, making the formation of ice, icicles and snow canopies impossible.
Electric heating prevents:
- formation of icicles on gutters and roof edges;
- blockage of drains with ice;
- collapse or deformation of gutters under the weight of ice, icicles and snow masses;
- rupture of pipes under the influence of ice.
Performance characteristics of heating cables
Electric cables for heating drains and roofs operate in difficult conditions - under the influence of moisture, negative temperatures, and mechanical loads. Therefore, it is necessary that the cables have the following set of characteristics:
- the tightness of the shell and resistance to atmospheric moisture;
- resistance to UV radiation;
- the ability not to change its properties at high and low (negative) temperatures;
- high mechanical strength allowing to withstand loads from snow and ice;
- safety associated with high electrical insulating properties.
Cables are supplied in coils or ready-made heating sections - cut pieces of a fixed length with a coupling and supply wire for connection to the network.
Sections – more convenient option, which is easier to install. Cable in coils is usually used for drainage and roofing. complex configuration, for which standard sections are not suitable.
Types of heating cables
Anti-icing systems can operate on the basis of two types of heating cables: resistive and self-regulating. Let's look at the features of each of them.
Type #1. Resistive cables
The most common, traditional version, characterized by the same output power along the entire length and the same heat dissipation. To heat gutters, resistive cables are used with a heat release of 15-30 W/m and an operating temperature of up to 250°C.
A resistive cable for heating gutters has a constant resistance and heats up equally over its entire surface. The degree of heating depends only on the current strength, without regard to external conditions. And these conditions for different parts cables may vary.
For example, one section of wire may be under open air, another - in a pipe, the third - to hide under foliage or under snow. To prevent ice from appearing in each of these areas you need different quantities heat. But a resistive cable cannot self-adjust and change the degree of its heating. Any part of it will have the same power and degree of heating.
Therefore, part of the thermal energy of the cable will be wasted on heating those parts of the pipe and roof that are already in “warm” conditions. Due to this, the electricity consumption of a resistive cable is always relatively high, but partially unproductive.
Depending on the design, resistive cables are divided into 2 types: serial and zone.
Serial cables
The structure of a serial cable is very simple. Inside it, along its entire length, there is a continuous conductor core, covered with insulation on top. The core is a copper wire.
To prevent it from causing negative electromagnetic radiation, a shielding braid is placed over the wire. Additionally, it acts as a grounding connection. Outer layer resistive cable is a polymer shell that serves to prevent short circuit and protection from external conditions.
A feature of a serial cable is that its total resistance is equal to the sum of the resistances of all its pieces. Therefore, when the length of the wire changes, its thermal power also changes.
Since the heat transfer process cannot be adjusted, constant monitoring of the cable is required, including removing accumulated debris. Leaves, branches and other debris can cause the cable to overheat and burn out. It cannot be restored.
Serial cables can be single-core or double-core. A solid conductor has one core. In a two-core wire, there are two wires running in parallel and carrying currents in opposite directions. As a result, electromagnetic radiation is leveled, making two-core cables safer.
Serial resistive cables have the following strengths:
- affordable price;
- flexibility, making it possible to place the cable on surfaces of various configurations;
- simple installation, in which there is no need to use “extra” parts.
Disadvantages include stable heat release, independent of weather conditions, and failure of the entire cable if it crosses itself or overheats at one point.
Zone cables
In addition to the usual resistive cable, there is an improved version of it - a zonal (parallel) cable. Its design contains two parallel insulated conductors. Around them is a high-resistance heating wire wound in a spiral.
This spiral (usually nichrome) through contact windows in the insulation is closed alternately to the first and then to the second core. Heat release zones independent from each other are formed. If the cable overheats and burns out at one point, only one zone fails, the rest continue to work.
Since the zonal heating cable for roofing and gutters is a chain of independent heat-generating sections, it is possible to cut it into fragments directly at the installation site. In this case, the length of the cut pieces must be a multiple of the size of the heat-generating zone (0.7-2 m).
Advantages of using a zone cable:
- affordable price;
- independent heat release zones, the presence of which allows you not to be afraid of overheating;
- easy installation.
Disadvantages include stable heat dissipation (as with a serial cable) and the fact that the size of the pieces cut for installation depends on the length of the heating zone.
Type #2. Self-regulating cables
This type of cable has great potential in heating systems for gutters and roofs.
Its structure is more complex than that of its resistive analogue. Inside the element there are two conductive cores (like a two-core resistive cable), connected by a semiconductor layer - a matrix. Next, the layers are arranged as follows: internal photopolymer insulation, shielding shell (foil or wire braid), plastic external insulation. Two layers of insulation (inside and outside) make the cable resistant to shock loads and increase its dielectric strength.
The main distinguishing detail of a self-regulating cable is a matrix that changes its resistance depending on the ambient temperature. The higher the ambient temperature, the greater the resistance of the matrix and the less heating of the cable itself. And vice versa. This is where the effect of self-regulation manifests itself.
The cable automatically and independently regulates power consumption and heating level. In this case, each section of the cable operates autonomously and, independently of other sections, selects the degree of heating for itself.
A cable with a self-regulating effect costs 2-4 times more than a resistive cable. But it also has many advantages, the most notable of which are:
- changing the degree of heating depending on environmental conditions;
- economical energy consumption;
- low power consumption (about 15-20 W/m on average);
- durability associated with the absence of the risk of overheating and burnouts;
- easy installation on any roof;
- possibility of cutting into suitable pieces (from 20 cm long) directly at the installation site.
In addition to the high price, the disadvantages of this option include long heating time, as well as high value starting current at low ambient temperatures.
Anti-icing system design
As already noted, the cable is the main (heating) element of the anti-icing system for gutters and roofs. But not the only one. To assemble a fully functioning system, the following components are used:
- heating cable;
- supply wire used to supply voltage (it does not heat up);
- fasteners;
- couplings;
- power unit;
- thermostat.
The productivity of the heating system largely depends on the thermostat. This device allows you to turn heating sections (cable) on and off, limiting their operation in a pre-fixed range of weather conditions. The thermostat can determine their value using special sensors that are installed in places of greatest accumulation of water.
A conventional thermostat is characterized by the presence of a temperature sensor. As a rule, for small systems, a dual-range thermostat is used with the ability to adjust the cable on and off temperature.
A specialized thermostat called a weather station controls the operation of the system more effectively. It contains several sensors that record not only temperature, but also a number of other parameters that affect the formation of ice. For example, air humidity, the presence of residual moisture on pipes and roofing. Weather stations operate in the mode of established programs and allow you to save up to 80% of electricity.
Heating cable installation
To install an anti-icing system, heating cables are laid:
- at the edge of the roof;
- in the valleys;
- along the line of intersection of the roof and adjacent walls;
- in horizontal gutters;
- in vertical drainpipes.
Features of cable laying in these areas have their own differences and features.
On the edge of the roof
In this area, the cable is laid like a snake so that it is above the edge outer wall by 30 cm. The height of the snake in this situation is 0.6, 0.9 or 1.2 m.
When installing a cable on a metal tile, a turn of wire is laid at each lower point of the wave. Installation on a metal seam roof requires a different approach. The cable rises along the first seam to the desired height, then descends to the gutter on the other side of the same seam. It passes along the gutter, reaches the next seam and repeats the cycle again.
If on pitched roof If there are no gutters, then significant ice growths and icicles can form on its edge. To prevent this from happening, the cable is laid in one of two ways: possible schemes: "dripping" loop or "dripping" edge.
The "drip" loop design assumes that melting water will flow and drip directly from the cable. To do this, the cable is mounted with a snake so that it hangs 5-8 cm from the edge of the roof.
The “dripping” edge scheme is organized according to a similar principle. Only the cable is fixed to the edge of the roof (dripline), laying it traditionally with a snake.
In valleys and at the intersection of roof and wall
Ice easily forms in valleys and other places at the junction of roof slopes. The cable here is laid in 2 threads, along the joint, 2/3 of its length. Due to this, a frost-free passage is formed through which melt water can flow.
A similar method of constructing a frost-free passage is used at the intersection of the roof and wall. Here the cable is also laid in 2 threads at 2/3 of the height of the slope. The distance from the cable to the wall is 5-8 cm, and the distance between its threads is 10-15 cm.
In gutters
In a horizontal trench, the cable is laid along its entire length in one or more parallel threads. The number of threads depends on the width of the gutter. If in a tray up to 10 cm wide it is enough to put one thread of cable, then in a tray with a width of 10-20 cm there are already two threads. For a wider gutter (more than 20 cm), their number is increased by adding one thread for every next 10 cm of width. Lay the cable so that there is a space of 10-15 cm between the threads.
To secure the cable in the gutters, use mounting tape or special plastic clips. It is also possible to manufacture fastenings in required quantities yourself - from a steel strip, which can easily be shaped into a clamp. Clamps and elements of the mounting tape are secured to the walls of the gutters with self-tapping screws. The resulting holes are sealed silicone sealant. A distance of 0.3-0.5 m is maintained between fastening elements.
In drainpipes
Ice often forms in drain funnels, blocking the path for melt water to drain from the roof. Therefore, cable laying is mandatory here. One thread of cable is placed in a pipe with a diameter of up to 10 cm, and two threads with a diameter of 10-30 cm. At the entrance to the pipe, the cable is secured to the walls using steel brackets.
In the upper and lower parts of the pipe, enhanced heating is required, which is carried out by laying additional cable strands - in the form of a “dripping” loop or several spiral turns.
If the length of the pipe exceeds 3 meters, a chain or cable with fasteners is used to lower the cable and secure it. The chain (cable) is suspended from a screwed wooden elements roofing hook or metal rod attached to a gutter.
The basic principles of installing a heating cable as part of an anti-icing system are discussed in the video:
It turns out that there is nothing complicated in installing a heating cable. Having understood the simple characteristics of cables and the nuances of their installation, you can build in a short time reliable system anti-icing.
Consuming very little electricity, this design will help you forget about icicles and ice on the gutters and roof of your house for a long time.
The winter period for a significant part of the territorial area of our country is characterized by frosts, which are replaced by a thaw and again a decrease in temperature. Such sudden temperature changes cause water to freeze in gutters and clog external and internal drainpipes.
The resulting layer of ice puts a large load on the surface of the gutter and drainpipes. This reduces the duration service life drainage system of the building or leads to it complete destruction. To protect the building the best solution a heating cable will be used.
To remove water from the roof, a heating cable is installed in gutters and drains. The power of the heating cable is calculated depending on the diameter of the gutters and drains, approximately from 20 to 30 W per linear meter.
We offer you a heating cable for heating gutters and downpipes, European and Russian manufacturers By affordable price. Our managers will advise, calculate and select best option heating gutters and drains.
