How much does it cost to build a house? This issue is key for most Belarusians - not every family can afford housing at the current price on the construction market. How to make a home affordable for the majority? Guided by market trends, several companies at once presented products based on the principles of modular housing construction. Small in size, but equipped with everything necessary for a family to live, these houses are accessible to almost every Belarusian.
New trend was picked up by the company “Modern frame technologies», known first Belarusian energy efficient house in Dzerzhinsk. During the Stroyexpo 2015 exhibition, at the open area of the BelExpo National Exhibition Center, the company showed the result of the work of its modular house-building division, House Machine - an energy-efficient modular house. The exhibitor has an A+ energy efficiency class with energy consumption of 55 kWh/m2 per year or 5.5 m3 of natural gas for heating. The total area is 40 square meters. It has three rooms - a studio room (kitchen + living room), a sauna and a bathroom.
The trick of a modular home is that it is designed to expand over time. With the help of additional modules, which can be purchased as needed, you can create a building of almost any configuration and size. There are any options for finishing outside and inside. You can order it without finishing, but then the charm of such a house is lost, when you can immediately live in it without having to do any repairs.
Construction and installation of the house is carried out within 4-12 weeks from the moment of agreement with project documentation. The entire construction process with finishing is carried out at the factory, which minimizes the amount of work “on site” after installing the modules, and allows for constant monitoring of the level of assembly quality.
Used to insulate the house mineral wool two types Isover profi and Isover Frame P-34. Thickness in the walls - 200 mm, in the floor - 250 mm, in the roof - 300 mm. Wind and waterproofing is carried out with the Tyvek Housewrap membrane, complete wrapping occurs on all 6 sides with mandatory gluing of seams, junctions, and passages of communication sleeves. The module is sheathed with massive timber 40×60 mm. The inside walls, floor and roof are covered with vapor barrier film. The structure is covered with OSB boards. All communications are hidden in the wall.
A small breather is responsible for ventilation in the house. air handling unit with heat recovery. Heating appliances include a wood-burning stove-fireplace (which also heats the sauna) and a convector.
Modular houses for permanent residence are just beginning to gain positions and popularity in the housing construction market. At the same time, the main problem that they have to overcome is the stereotype that has developed over many years around modular construction. Modular container homes have gained popularity as prefabricated temporary structures in areas where conventional home construction is either very difficult or prohibitively expensive.
Typical examples are dormitories, modular canteens and office buildings in oil and gas production areas, cabins at construction sites, as well as tire shops, hostels, kiosks and simply modular stores that can hardly be called architecturally attractive. However, having accumulated relevant experience, companies are increasingly offering to build modular houses for year-round living, adapting them to the wishes of future residents.
Modular private houses: advantages and disadvantages
A modular residential building is built from separate blocks, which may include a ready-made room (for example, bathroom or kitchen), and just be part of the room. This principle of construction, if you look at it in a simplified way, reminds everyone of the well-known LEGO constructor - it allows, taking a standard solution as a basis, to adapt modular house projects, creating optimal premises, increasing the area, changing functional purpose rooms, etc. Therefore, ready-made modules/blocks are delivered to the construction site, which only need to be connected by combining utility lines.
The undoubted advantage of modular construction is the production of residential modules in the factory. Thanks to this, it is possible to solve several problems at once:
- full compatibility of individual blocks/modules due to strict adherence to manufacturing standards
- When manufactured in a workshop, the materials are not subject to atmospheric influences - there is no danger that the insulation will become damp or wet. Plus - the quality of work is guaranteed by the use of modern equipment
- control of all processes - all operations are under supervision, because often in private housing construction you just have to take the word of the hired workers, because there is no way to fully control their work. This ensures both full compliance with technology and standards and improves the quality of work. Individual manufacturers carry out full control engineering communications, including the operation of the plumbing system.
The production of the base module is determined by the frequency of use of the future home. A modular house for permanent residence has stronger walls, for example:
- 12 mm cement laminated board
- vapor insulation (first layer, 0.15 mm)
- basalt insulation (minimum 15 mm)
- vapor insulation (second layer, 0.15 mm)
- 12 mm cement laminated board
According to their own thermal insulation properties such a “sandwich” exceeds a half-meter brickwork. A prefabricated modular house for year-round use will require a reinforced base frame and the pouring of a solid foundation, improved hydro- and thermal insulation, and installation of an effective heating and ventilation system.
There are a lot of options for choosing materials to create the base of the module. The most common is metal carcass with the installation of insulated panels, they are most often used for the construction of houses for permanent residence. For country houses a suitable option is a frame created on the basis of a light steel structure, thin walls with thin insulation. Much less commonly used are frames mounted from wood, with sandwich panels or panels made of planed boards with mineral insulation.
- construction speed – if you do not take into account the time for laying the foundation (this will be the longest part of the construction), then the construction of a modular house will take 1-2 weeks. After all, ready-made modules will simply need to be installed and docked engineering systems, connecting them to external communications, seal the seams, install strips and carry out finishing work
- possibility of expansion – the project may provide for further expansion of the house by installing (on the sides or on top) additional blocks
- strength and earthquake resistance – modular houses are often built in areas with high seismic hazard; a reinforced metal frame ensures the safety of modular houses during earthquakes up to magnitude 9. Fact: in New Orleans, which was practically wiped off the face of the earth by Hurricane Katrina, it was modular houses built on the basis of metal block containers that suffered the least damage.
- minimum construction waste, which inevitably accompanies construction, because the module arrives at the site in a state of 95% readiness. This allows you to build houses while keeping the original natural landscape virtually untouched.
- low cost – the price per square meter in a modular house will cost almost 2 times less than in traditional construction.
The main disadvantage of modular construction is directly related to its advantage, namely the complexity of delivery and installation of the finished module, which will require a vehicle with a special platform, as well as a powerful truck crane. If we take European calculations, then a square meter of modular housing in a factory costs about $200-250, but due to the rental of heavy construction equipment, its cost in a finished (assembled) house increases by 1.5-2 times.
Construction of modular houses: from unification to individuality
Talk about the design limitations and monotony of architectural solutions for modular construction is a thing of the past. Today you can order a modular house in almost any style - from colonial with a traditional central hall and other rooms grouped around it to a house in Mediterranean style. But still, modular houses are most in demand in modern styles – high tech or minimalism. Quadrangular simple form, in which clear and simple lines give geometric rigor, fully consistent with the spirit of minimalism. Another popular solution typical for modular buildings– a large glazing area that helps fill the house with natural light, blurring the line between the outside environment and the interior.
An energy-efficient home is not an idealized vision of the home of the future, but a reality today that is becoming increasingly popular. An energy-saving, energy-efficient, passive house or eco-house is today called a home that requires minimal maintenance costs comfortable conditions living in it. This is achieved through appropriate decisions in the field of construction and construction. What technologies for energy-saving houses exist in this moment, and how much resources can they save?
No. 1. Designing an energy-saving house
A home will be as economical as possible if it was designed taking into account all energy-saving technologies. It will be more difficult to remodel an already built house, more expensive, and it will be difficult to achieve the expected results. The project is developed by experienced specialists taking into account the customer’s requirements, but it must be remembered that the set of solutions used must, first of all, be cost-effective. Important point – taking into account the climatic features of the region.
As a rule, houses in which people live permanently are made energy-saving, so the first priority is to save heat, maximize the use of natural light, etc. The project should take into account individual requirements, but it is better if the passive house is as compact as possible, i.e. cheaper to maintain.
Can meet the same requirements various options . Joint decision-making by the best architects, designers and engineers made it possible to create a universal energy saving frame house (read more -). The unique design combines all economically advantageous offers:
- thanks to SIP panel technology, the structure is highly durable;
- decent level of thermal and noise insulation, as well as the absence of cold bridges;
- the construction does not require the usual expensive heating system;
- using frame panels, a house is built very quickly and is characterized by long term services;
- The premises are compact, comfortable and convenient during their subsequent use.
Alternatively, can be used to construct load-bearing walls, insulating the structure from all sides and ultimately obtaining a large “thermos”. Used frequently wood as the most environmentally friendly material.
No. 2. Architectural solutions for an energy-saving house
To achieve resource savings, it is necessary to pay attention to the layout and appearance Houses. The home will be as energy efficient as possible if the following nuances are taken into account:
- correct location. The house can be located in the meridional or latitudinal direction and receive different solar radiation. It is better to build a northern house meridionally to cripple the influx sunlight by 30%. Southern houses, on the contrary, are better to be built in a latitudinal direction to reduce air conditioning costs;
- compactness, which in this case is understood as the ratio of the internal and external area of the house. It should be minimal, and this is achieved through rejection of protruding premises and architectural decorations type of bay windows. It turns out that the most economical house is a parallelepiped;
- thermal buffers, which separate living spaces from contact with the environment. Garages, loggias, basements and non-residential attics will be an excellent barrier to the penetration of cold air from outside into rooms;
- proper natural light. Thanks to simple architectural techniques, it is possible to illuminate the house with sunlight for 80% of the entire working time. Premises, where the family spends the most time(living room, dining room, children's room) better positioned on the south side, for pantry, bathrooms, garage and others auxiliary premises there is enough diffused light, so they can have windows facing north. Windows facing east in the bedroom In the morning they will provide you with a boost of energy, and in the evening the rays will not interfere with your rest. In summer, in such a bedroom it will be possible to do without artificial light altogether. As for window size, then the answer to the question depends on everyone’s priorities: saving on lighting or heating. Great welcome - installation solar tube. It has a diameter of 25-35 cm and is completely mirrored inner surface: taking Sun rays on the roof of the house, it maintains their intensity at the entrance to the room, where they are diffused through a diffuser. The light is so bright that once installed, users often reach for the switch when leaving the room;
- roof. Many architects recommend doing as much as possible simple roofs for an energy-saving home. They often opt for a gable option, and the flatter it is, the more economical the house will be. Snow will linger on a flat roof, and this additional insulation in winter.
No. 3. Thermal insulation for an energy-efficient home
Even a house built taking into account all the architectural tricks requires proper insulation to be completely sealed and not release heat into environment.
Thermal insulation of walls
About 40% of the heat from the house escapes through the walls Therefore, increased attention is paid to their insulation. The most common and simplest method of insulation is the organization of a multi-layer system. sheathed insulation, which is often mineral wool or expanded polystyrene, a reinforcing mesh is mounted on top, and then a base and main layer of plaster.
More expensive and advanced technology - ventilated facade. The walls of the house are sheathed with mineral wool slabs, and facing panels made of stone, metal or other materials are mounted on special frame. There remains a small gap between the insulation layer and the frame, which plays the role of a “thermal cushion”, does not allow the thermal insulation to get wet and supports optimal conditions in the home.
In addition, in order to reduce heat loss through the walls, insulating compounds are used at the junction of the roof, taking into account future shrinkage and changes in the properties of some materials with increasing temperature.
The principle of operation of a ventilated facade
Roof thermal insulation
About 20% of the heat escapes through the roof. To insulate the roof, the same materials are used as for the walls. Widespread today mineral wool and polystyrene foam. Architects advise making roof insulation no thinner than 200 mm, regardless of the type of material. It is important to calculate the load on the load-bearing structures and roof so that the integrity of the structure is not compromised.
Thermal insulation of window openings
Windows account for 20% of heat loss in a home. At least better than the old ones wooden windows, protect the house from drafts and isolate the room from external influences, they are not ideal.
More progressive options for an energy-efficient home are:
Thermal insulation of floor and foundation
10% of heat is lost through the foundation and floor of the first floor. The floor is insulated with the same materials as the walls, but other options can be used: self-leveling heat-insulating mixtures, foam concrete and aerated concrete, granular concrete with a record thermal conductivity of 0.1 W/(m°C). You can insulate not the floor, but the ceiling of the basement, if such is provided for in the project.
It is better to insulate the foundation from the outside, which will help protect it not only from freezing, but also from other negative factors, incl. influence groundwater, temperature changes, etc. To insulate the foundation, use sprayed polyurethane and foam.
No. 4. Heat recovery
Heat leaves the house not only through the walls and roof, but also through. To reduce heating costs, supply and exhaust ventilation with recovery is used.
Recuperator called a heat exchanger that is built into the ventilation system. The principle of its operation is as follows. Heated air through ventilation ducts leaves the room, gives up its heat to the recuperator, coming into contact with it. Cold fresh air from the street, passing through the recuperator, heats up and enters the house already room temperature. As a result, households receive clean fresh air, but do not lose heat.
Such a ventilation system can be used together with natural ventilation: air will enter the room forcibly and exit due to natural draft. There is one more trick. The air intake cabinet can be located 10 meters from the house, and the air duct is laid underground at a freezing depth. In this case, even before the recuperator, the air will be cooled in the summer and heated in the winter due to the soil temperature.
No. 5. Smart House
To make life more comfortable and at the same time save resources, you can and technology, thanks to which it is already possible today:
No. 6. Heating and hot water supply
Solar systems
The most economical and environmentally friendly way to heat a room and heat water– is to use the energy of the sun. This is possible thanks to solar collectors installed on the roof of the house. Such devices are easily connected to the heating and hot water supply system of the house, and the principle of their operation is as follows. The system consists of the collector itself, a heat exchange circuit, an accumulator tank and a control station. A coolant (liquid) circulates in the collector, which is heated by the energy of the sun and transfers heat through a heat exchanger to the water in the storage tank. The latter, due to its good thermal insulation, is capable of maintaining hot water. This system can be equipped with a backup heater, which heats the water to the required temperature in case of cloudy weather or insufficient sunshine.
Collectors can be flat or vacuum. Flat ones are a box covered with glass, inside it there is a layer with tubes through which the coolant circulates. Such collectors are more durable, but today they are being replaced by vacuum ones. The latter consist of many tubes, inside of which there is another tube or several with coolant. There is a vacuum between the outer and inner tubes, which serves as a heat insulator. Vacuum collectors are more efficient, even in winter and in cloudy weather, and are repairable. The service life of collectors is about 30 years or more.
Heat pumps
Heat pumps use low-grade ambient heat to heat the house, incl. air, subsoil and even secondary heat, for example from a pipeline central heating. Such devices consist of an evaporator, a condenser, an expansion valve and a compressor. All of them are connected by a closed pipeline and operate based on the Carnot principle. Simply put, a heat pump is similar in operation to a refrigerator, only it functions in reverse. If in the 80s of the last century heat pumps were a rarity and even a luxury, then today in Sweden, for example, 70% of houses are heated in this way.
Condensing boilers
Biogas as fuel
If a lot of organic waste accumulates Agriculture, then you can build bioreactor for biogas production. In it, biomass is processed by anaerobic bacteria, resulting in the formation of biogas, consisting of 60% methane, 35% carbon dioxide and 5% other impurities. After the cleaning process, it can be used for heating and hot water supply at home. The processed waste is converted into excellent fertilizer that can be used in the fields.
No. 7. Electricity sources
An energy-efficient home should, and preferably, receive it from renewable sources. Today, a lot of technologies have been implemented for this.
Wind generator
Wind energy can be converted into electricity not only by large wind turbines, but also by compact “home” wind turbines. In windy areas, such installations can fully supply a small house with electricity; in regions with low wind speeds, it is better to use them together with solar panels.
The force of the wind moves the blades of the windmill, which causes the rotor of the electricity generator to rotate. The generator produces an alternating unstable current, which is rectified in the controller. There the batteries are charged, which, in turn, are connected to inverters, where the conversion takes place DC voltage into a variable used by the consumer.
Windmills can have a horizontal or vertical axis of rotation. With one-time costs, they solve the problem of energy independence for a long time.
Solar battery
The use of sunlight to generate electricity is not so common, but in the near future the situation risks changing dramatically. The principle of operation of a solar battery very simple: used to convert sunlight into electricity p-n junction. The directed movement of electrons, provoked by solar energy, is electricity.
The designs and materials used are constantly being improved, and the amount of electricity directly depends on the illumination. Various modifications are currently the most popular silicon solar cells, but an alternative to them are new polymer film batteries, which are still in the development stage.
Energy Saving
The resulting electricity must be used wisely. The following solutions will be useful for this:
No. 8. Water supply and sewerage
Ideally, an energy-efficient home should get water from a well located under the dwelling. But when the water lies at great depths or its quality does not meet the requirements, such a solution has to be abandoned.
It is better to pass household wastewater through a recuperator and take away their warmth. For the cleaning Wastewater can be used septic tank, where the transformation will be accomplished by anaerobic bacteria. The resulting compost is a good fertilizer.
To save water, it would be a good idea to reduce the volume of water drained. In addition, a system can be implemented where the water used in the bathtub and sink is used to flush the toilet.
No. 9. What to build an energy-saving house from
Of course, it is better to use the most natural and natural raw materials, the production of which does not require numerous processing stages. This wood and stone. It is better to give preference to materials that are produced in the region, because this way, transportation costs are reduced. In Europe, passive houses began to be built from the products of processing inorganic waste. , glass and metal.
If you once pay attention to studying energy-saving technologies, think through the design of an eco-house and invest in it, in subsequent years the costs of its maintenance will be minimal or even tend to zero.
A person does not need a thing, he needs its function. A new trend, a simple idea in its essence, seems to be changing the idea in Russia about suburban construction. Especially regarding monthly heating of the house. For a house to be called energy efficient, it must have two properties. On the one hand, it warmed up quickly, that is, it had low energy consumption. On the other hand, it retained the required amount of heat for as long as possible without additional heating of the room. Perhaps, the closest to the status of energy-efficient houses in terms of the given ideal parameters are the so-called modular houses.
Sergey Katargin
The house was produced at the junction of two technologies, frame and SIP. The main frame is made and covered with SIP panels to increase rigidity and increase the insulation layer. The houses are pre-fabricated and are designed to be transported in modules. Accordingly, the entire power frame is designed to move. It already has greater structural rigidity than a conventional house.
The principle of modular housing construction was invented at the beginning of the 20th century, when the task was to build quickly. The energy-efficient properties of such houses appeared later, and today they have become an integral property.
Sergey Katargin
director of a modular housing construction company
We are in the middle module. This 40 square meter house consists of 3 modules. The middle module connects to the outer one along this wall. There is a joint under the baseboard. Before transporting the modules, the end is insulated with mineral wool insulation or jute and when the modules are joined, it is foamed at the top and bottom. And it is additionally secured with metal ties.
One way to increase the energy efficiency of a home is to increase the thermal contour of the building. Perhaps the most popular wall insulation is polystyrene foam, which in turn can also carry a distributed load, that is, act not only as insulation, but also as part frame system. Sometimes it is used as decoration, but at the same time it does not lose its insulating properties. On average, an insulation thickness of 320 mm is sufficient for the Ural climate. Meanwhile, in modular houses it can be even more. For increased wall thickness, parameters are individually calculated power frame still at the design stage.
Sergey Katargin
director of a modular housing construction company
Of course, these houses, due to the fact that there is a large layer of insulation, will compare favorably with houses built using standard technologies, in addition to the fact that there will be a constant temperature in hot and cold weather, there is ventilation with heat recovery.
Heat recovery is the transfer of heat to fresh air, which is carried out in a special heat exchanger. Since modular houses are classified as a type of building where the walls are homogeneous and there are no cold bridges, they require mandatory installation ventilation, and forced. By the way, forced ventilation- This hallmark energy efficient houses. Modular homes are no exception. But in order to ensure that the temperature of the incoming air does not affect the microclimate in the house, a recuperator is also installed. And the room is thus never cold, stuffy, and there are no drafts.
Sergey Katargin
director of a modular housing construction company
It must be said that modular houses have a design that allows the building not to depend on the presence or absence of gas as a heat source. Eg, stone houses It is impossible not to drown at all. But drown brick walls using an electric boiler is unreasonably expensive. Meanwhile, in modular houses, the heating can be turned off completely during departure. And upon the arrival of the owners, an electric radiator will quickly heat the room. And gas can be used in cylinders for cooking. By the way, connecting a house to a gas main costs from 100 to 300 thousand rubles. And heating 40 square meters of a modular house in winter using electric radiators costs no more than 900 rubles per month. The arithmetic is stunning, especially when it is already known that gas prices will definitely rise.
