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Heating of roofs

Roofing system is the main barrier protecting buildings and constructions from aggressive meteorological influence. In an area of coverage of temperate continental climate, including Moscow and some other the megalopolises of the Russian Federation, it is exposed not only to mechanical loadings in the form of wind and rainfall, but also to harmful influence of temperature drops, quite often falling lower than fifteen and even twenty degrees Celsius in this region. Such situation is the main reason for deterioration in operational qualities and early failure of roofing systems. Electric heating of roofs is created especially for effective counteraction to destructive influence of low temperatures and atmospheric precipitation on systems made of any roofing materials.

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How it works

Despite the seeming lightness, new-fallen snow weighs a lot. The mass of cubic meter of such snow can be about half tones. The roof of an average cottage of eighty square meters can carry the crust weighing about twenty tons. It is an enormous weight, which not every construction can sustain. It is possible to clean the roof manually, go up and work with a shovel, but it is much more expedient to install the electric systems of anti-frosting and snowmelt. They will with guarantee protect the roof from mechanical and temperature overloads, and people from falling of snow masses and icicles which under certain conditions can do harm to health.

Наглядные преимущества применения системы обогрева кровли

Advantages of cable heating

Protection of a roof by means of electric heating elements is used both on civil, and on industrial facilities. Today it is the most effective and available way of fight against snow and ice on roofs, valleys and drains. It is implemented by means of the heating cable, which differs from usual conducting production in ability to transform electric current to thermal energy.

Cores of the heating cable have high resistance. Current, passing on them, heats the conductor, and it transfers thermal energy to material of a roof and the frozen rainfall, forcing them to thaw. Refractory metals and alloys on their basis are used for production of the heating elements. Their specific resistance is much higher, than at traditional conductors.

Electric systems favorably differ from alternative ways of protection. These are their main advantages:

  • High operational rates. The system is unpretentious, reliable, safe and has long service life.
  • Attractive cost. Application of the heating cables is economically proved, it costs significantly cheaper, than replacement of a roofing system.
  • No need for permanent control. Devices are almost completely independent.
  • Simplicity of installation. The erection team having corresponding knowledge, skills and experience carries out installation, check and connection of all elements of system in the shortest time without usage of difficult technological means.

Electrical heating of roofs

It is carried out by means of a number of the elements connected and interacting among themselves. Thanks to their harmonious work the necessary result is achieved practically without participation of a person. It is required only for primary control of system and check of its working capacity. Design of system is carried out considering the following factors:

  • Constructional features of a roof. Sizes, tilt angle, configuration, type of a system and mass of other subtleties are considered at a project development stage.
  • Climate. Indicators of the minimum and average temperature in the region are considered in the winter.
  • Existence of stationary drain system and its feature. Stormwater drain parameters, drain length, configuration of a drip and many other technical indicators are very important.

The efficiency, non-failure operation and safety of an electrical heating depend on quality and reliability of each element of the system. All the components are sorted in details below.

The heating cables

It is the main component of any electric heating system. They are divided into two main versions:

  • Self-regulating. This hi-tech device capable to independently level intensity of generation of thermal radiation in response to change of atmospheric conditions. Such cables are completely autonomous, their overheating for any reasons is excluded. ‘‘Teplovye Sistemy’’ has solutions for customers with various needs and financial opportunities. The model range is presented by TSA, TSL, TSS and TSU cables differing among themselves in material of isolation and temperature conditions. All products have unsurpassed reliability, durability and acceptable cost.


  • Resistive. Such production is noticeably cheaper than the previous version, but also technical characteristics are much more modest. First of all it concerns profitability indicators. The resistive cable demands extremely accurate installation, and its use requires a lot of accompanying devices and accessories. There are single - and twin-core products. The model range of ‘‘Teplovye Sistemy’’ is presented by such modifications as: LTS, RTS, TS-RD and TS-RS.

Из чего состоит кабель для обогрева кровли

System of electric safety and automatic control

It is used for ensuring smooth functioning of all operating system components. Consists of the following elements:

  • Sensors. A number of highly sensitive meteorological sensors is used.
  • Boxes. With their help distribution of cables to several lines is carried out.
  • Device of protective power off. Cuts off power systems in case of accident emergence.
  • Automatic machines. Protect electronics from differences of tension and peak loadings.
  • Alarm system. Notifies the owner if something goes wrong.
  • Temperature regulator. Levels intensity of thermal emission in resistive chains.

Без-имени-1.png

Important!
Sensitive electronics shouldn't be mounted on the street, it is fraught with emergence of failures in work of all system.

Electrical distributive network

In most cases the main system includes two subnets - power and information. It is applied to connection of all elements, their interaction and control of operation of the equipment. It is necessary to know that absolute safety of its functioning is reached only at observance of fundamental points of Regulations for electrical installation in the course of works. Connection has to be carried out strictly according to the scheme. It can look like this.   

Fastening

These are the constructional elements used for reliable fastening of heaters on roofing systems made of any material. They are simple in application, reliable and fasten any type of a cable on a roof without doing it harm. This are groups of goods, which are in the greatest demand in the domestic market in the context of installation and service of electric systems of anti-frosting:

  • Special tapes. Production from aluminum and synthetic fibers is used.
  • Accessories. Straps, steel fastening, precautionary plates are applied.
  • Repair kits. Thanks to such kits it is easy to fix suddenly arisen problems without any assistance of profile experts.

Such details give an opportunity to install a protective system, without damaging the roof and its constructional elements

Installation

Installation of the operating system components is a very important procedure demanding presence of experts in the corresponding fields, with skills and practical experience. ‘‘Teplovye Sistemy’’ has a team of assemblers possessing all these qualities. The working procedures on installation of the equipment can change depending on constructional features of a roof, type of system, scales of an object and technical nuances, but, as a rule, installation is carried out in such order:

  • Preparatory activities. Consist in cleaning of working surfaces, their marking and connection of some elements to the ground.
  • Installation of the electronic module. It is mounted indoors (not necessarily inhabited).
  • Installation of sensors. Sensors are fastened in places, where influence of third-party factors on them is excluded. They shouldn't be affected by the systems of heating, direct sunshine and thermal streams from external blocks of the climatic equipment. Sensors of moisture are set in places, where rainfalls thaw in the first place. Sensors are reliably fastened in places of dislocation by means of clamps and couplers made of strong polymeric materials.
  • Cable laying. Before installation all cores are tested for continuity and their specific resistance is measured. It is done to make sure there is no breakdown. The cable is  laid on a spiral or in the form of a crest at bottom edge of a roof with fastening between each stage, fixing it by special slips or profile arms. Special attention is paid to density of adhesion of the heating element to the system. In avoidance of overheating saggings of a cable are not allowed.
  • Connection of all components. Each element is connected to the control unit, configuration of the heating and alarm wires is carried out, connection of sensors and protective devices is carried out. Process is performed according to the protective scheme and standards of Rules of installation of electric equipment. After completion of assembly the grounding contour is connected.
  • Testing. Consists in carrying out commissioning (on condition of admissible temperature outside). The system is on and control measurements of key indicators are made.

To avoid mechanical damages of a roof, strengthening of separate elements, locking, pressuring up and some other operations are performed before lifting on the roof.

Electric power expense

The profitability of system for vast majority of Russians is the defining factor, by which they are guided at the choice of protective electric equipment. It is natural, because payment for electric power is the biggest part of expenses of each budget. It is possible to learn approximate values of cost of anti-frosting system this way:

C year = Rn*h*S

Where:

  • C year - total cost of work of system in a year.
  • Rn - rated power of the installed components, kW.
  • S - cost of 1 kW/hour of the electric power for the specific consumer.
  • h - time (in hours) operation of heaters for all year.

The last parameter is calculated approximately, it is impossible to find out weather conditions with an accuracy of several degrees for all season in advance. For calculation assume that the equipment will be switched on in the middle of November and is disconnected in the middle of April. At continuous functioning of system (that is almost impossible in view of obligatory existence of days with above-zero temperature) it will turn out that it will work a little more than three and a half thousand hours. It is that maximum by which it is possible to be guided. The actual figures are much more modest. It is found out by an empirical way that the rated power of a cable has to be not less than of 20 W / meter.

On the example given below it is shown, how expenses on the electric power spent for work of resistive system of protection for a season are calculated:

C year = 5 kW*2700 h*1,05 rub / kW*h = 14 175 rubles

Use of self-regulating cables will reduce these figures by ten-seventeen percent. But even without it the account, which should be paid annually, is 10 times less the expenses spent for replacement of the cheapest roofing system and capital repairs of constructional elements.

The cost of installation of anti-frosting system in the capital of the Russian Federation

The professional installation carried out according to requirements of the relevant regulations is pledge of long and uninterrupted service of each element of system. The cost of installation depends on many factors. These are constructional features of roofing elements, type of system, price of the installed equipment and mass of other subtleties, including the financial strategy of the enterprise, which carries out installation. Let's skip the details and consider an average value of a price in the market of assembly services of the capital. It is possible to claim that it is comparable with a half the cumulative cost of all mounted elements, including the main equipment and auxiliary components, which will be used in process.


Approximate quotations for all range of the works connected with laying of heating elements on a roof and their start on average in Moscow are provided below:

Installation of heating elements at a temperature more than 10 °C

от 200 rub/lin.m

Installation of heating elements at a temperature from 2 to 10 °C

250  rub/lin.m

Installation of heating elements at a temperature less than 2 °C

от 300  rub/lin.m

Installation of power cable

200  rub/lin.m

Protection of power cables with corrugated elements

50  rub/lin.m

Drilling of openings in walls for fastening

1000 rub/p.

Assembly of cabinets

500 rub/p.

Installation of cabinets and boxes

1000 rub/p.

Connection of cabinets

2000 rub/p.

Installation of a temperature sensor on a roof

500 rub/p.

Installation of a temperature sensor in a trench

500 rub/p.

Installation of drain system

450 rub/lin.m

 

Advantages of cooperation with "Teplovye sistemy"

Corporate group "Teplovye sistemy" is a large versatile enterprise, for a long time and quite successfully working in the sphere of engineering. The organization specializes in development of projects, production, installation and service of electrical systems of anti-frosting , which cornerstone are heating cables of various application. Goods of holding are applied to protection of constructional elements of roofs, any shutoff valves and pipelines of various purpose. Cooperation with the company promises the mass of benefits to clients, such as:

  • Unsurpassed production quality. And it is not mere words. For production of each position of the company only high-quality materials and accessories of import production are used. All production is tested in laboratories and completely conforms to the high European quality standards and safety.
  • Impressive range. In the catalog of the enterprise there are offers for protection of objects of any scale and purpose against snow and ice, which consider financial opportunities of each client.
  • Integrated approach to the solution of the most difficult tasks. Technical calculations are carried out and visits of qualified specialists on objects are provided. The order complete set, its delivery and professional installation are carried out. The universality of the company gives an opportunity to clients to receive everything necessary in one place: from creation of the budget project documentation to carrying out commissioning.
  • Very attractive cost. The price policy of the company is much lower than offers of a retail on all import production and the majority of brands of the Russian companies.

Corporate group "Teplovye sistemy" has been productively working for years and has won perfect reputation of the enterprise, which has the absolute quality of goods. It's impossible to find more responsible producer!




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By clicking on the "Submit" button, I confirm that I agree To the terms for processing personal data and have read the privacy Policy.