Laying pipes for heating in a private house. Heating and underfloor heating: laying heating pipes in the floor
Usually, underfloor heating it is required for all types of buildings and structures with one purpose - to free up free space and make the interior decoration of rooms more elegant. After all, it is no secret to anyone that pipes cannot decorate the interior, no matter how modern they are. Our engineering and installation company performs similar services, equipping.
I must say that laying heating pipes in the floor can be carried out if you need it, and you will discuss this moment with our design engineers. In this case, pipes will be hidden on the floor that will be connected to all radiators and batteries. Agree that the hidden mode is very attractive. The Savard company will offer services on a heat-insulated floor of the highest quality!
If you want to equip your home or, in any case, you will need project documentation. If we are talking about an apartment, then a number of approvals with specialized utilities will still be required. Without design documents, installers will not be able to do their part of the work.
Even if you want, you still need to carry out the design. This applies not only to residential premises, but also to industrial, administrative, and public. In other words, without a project, you can not start installation work. Yes and floor heating installation without appropriate documents it cannot be of high quality.
How to lay a warm floor in an apartment, a house
Even if you order, it is necessary to perform many calculations and measurements so that the established communication is of high quality. Calculations should be thermotechnical, hydraulic and other. With their help, you can solve problems with the place of the pipeline, the diameter of the pipes, the fencing of the room.
Correct construction of the project, all diagrams and drawings, as well as the introduction of the correct calculation data will help pave a warm floor, as well as all heating communications without errors. It will also be silent and handle its functions very well. In addition, a properly installed heating system will not fail in a month.
Now imagine that you hired an organization that did not take care to create a project, and even during installation activities did not make a reliable impression. What will be the result? Deplorable. Therefore, do not trust frivolous companies so as not to lose time and money.
Turnkey floor heating installation
If you are installing water heated floors, then a flexible pipe will pass along the outside of the floor. It will contain the coolant. This is usually water. Her system will be taken from a heating boiler or from a conventional heating utility network.
However, without agreement with the relevant organization, it is too early to talk about warm floors. Say more, getting permission is not easy. Therefore, it is better to order a water supply system immediately. Then things will go faster.
Discover, how much is laying a warm floor in an apartment, country house or office is very simple. You just need to leave a request through our website for free calculation of the cost of underfloor heating in Moscow or the region. Based on your preferences and budget, our engineers will select for you
Increasingly, you can find such a method of installing a heating system in which a hidden gasket is used.
They use laying heating pipes in the floor, laying in gates in the walls, under a suspended ceiling.
A heated floor system is also used, in which the entire heating system is hidden under the floors of the room.
Let's try to figure out what restrictions on pipes and how to install them are laid by laying in the floor - both on the supply lines and on the warm system.
According to the applicable building codes, installation under the floor must be carried out using corrugations, and for steel pipes without corrugations.
Instead of corrugation, you can use a steel pipe of larger diameter.
During installation, it is necessary to provide hole holes in those places where there are detachable pipe connections. These are perhaps the most important ones provided for by Russian standards.
There are inconsistencies between current standards and applicable technologies. Russian standards in no way regulate the special rules for the installation of polypropylene and polyethylene pipes.
In addition, it is not taken into account that reinforced plastic pipes withstand compressive loads, periodic compressive loads that arise when walking on the floor even better than the screed itself, and theoretically they can also not be laid in sleeves, corrugations, etc.
Laying of heating pipes in the floor is not regulated by current standards in terms of thermal expansion, which can reach 10% for polypropylene pipes, in the installation of radiators and other devices taking into account thermal expansion. And this is the cause of many accidents.
Construction companies that produce valves and have long gone ahead and provide special connections for radiators, taking into account thermal expansion and deformation. A little further went the standards of the Republic of Belarus, in which there is a group of standards governing the installation of plastic heating pipes in the floors. However, they do not take into account all the subtleties, often just following these rules is not enough to follow.
The situation is quite bad in accordance with current standards and laying of underfloor heating.
According to the standards, most floor heating pipes cannot be used at all.
However, as practice shows, warm floors made of plastic pipes have been in operation for a long time, they have proven their reliability and safety.
The same can be said about the warm floors of copper pipes.
The only thing that clearly regulates the standard is the maximum temperature of the heated floor in the room - 26 degrees for residential, 31 degrees for rooms in which people are not constantly located, for pools, benches in saunas, etc.
Therefore, when installing plumbing systems in the floor, they are guided by complex technologies that are offered by various manufacturers of plumbing.
Installation rules for different types of pipes
- Steel tubes. As already mentioned, they can be laid under the floor without using corrugations. However, some protection is still necessary. It is unlikely that someone would want the ceiling of the neighbors to be heated from your pipe, or the heat from it went to the drying out of the beams of the wooden floor, which causes the fragility of the tree and cracks from drying out. Therefore, it is necessary to wrap a hot pipe, regardless of its type, in polyurethane foam thermal insulation before mounting it on the floor. It is also necessary to provide hatches in the floor where there are valves, viewing devices, detachable connections, and do not close access to them. This is especially true for valves and viewing devices.
- Plastic pipes. Most often, laying heating pipes in the floor of the apartment is done using them. They have sufficient strength, reduced coefficient of thermal expansion due to the presence of a reinforcing metal shell inside the pipe. During installation, it is necessary to install expansion joints every 10 meters of the pipe, which are considered a detachable connection. In addition, when connecting radiators, it is advisable to install special compensation racks. Pipes must be laid in.
- Polypropylene pipes. It is recommended to use pipes with a strength index not lower than pH25. The installation rules are the same as for plastic pipes.
Installation in screed, dry floor system
Installation in screed and dry floor is done in thermal insulation. A prerequisite is that a layer of screed or backfill of a dry floor with a thickness of at least three centimeters covers the pipe and thermal insulation from above. It is advisable to hide the pipe in the corrugation after the thermal insulation device.
Installation under wooden floors
Wooden floors are rarely used in apartments.
More often, laying heating pipes in a wooden floor is required.
When installing under wooden floors, you can not use corrugation.
It will be enough just to arrange a thermal insulation layer.
It is necessary that the distance from the pipe to the log and other structures that can be deformed and act on the pipe is at least 5 cm. The pipes are fixed to the main floor with brackets.
If the floor is made on wooden supporting beams, and the basement is at the bottom, the heating pipes are installed according to the same rules as for the basement. Heat and waterproofing are arranged, a number of other additional requirements are fulfilled.
Warm floor
Underfloor heating pipes are laid in a screed of mortar or dry floor with sand aggregate. A wood-based heated floor is very inefficient. Every 10 meters of the floor heating pipes, a compensating coupling must be made.
It is impossible to close it from above with a floor. If you want her to also participate in the heating process - you can fill it with ordinary sand and lay a steel sheet on top. Apply expanded clay sand for a dry warm floor is not worth it.
The screed solution or backfill of the dry floor should cover the pipe on all sides by at least 3 cm. Steel, copper pipes, metal-plastic pipes and polypropylene pipes with a pH value of 25 or more can be used. The most important rule is that one-piece joints must be made efficiently, the system must be crimped before closing it with a screed.
About how to make a screed over a warm floor - presented in the video:
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A pretty simple question about heating pipes: to lay them outside or inside walls? The answer to it can also be very simple, but the consequences of your choice can be very deplorable. During the construction of the frame house, we had the same question and the answer to it was definitely in the wall. Well, what could happen? If the pipes are soldered responsibly, then nothing will ever happen! But the farther the construction progressed, the more problems there were for conducting heating inside the walls, at some point they put up with it and laid pipes over the baseboard.
Let's see what are guided by when making such a decision and what do not take into account at all. Of course, the first and most important thing for everyone is appearance. We build for ourselves and want us to have the best of all, but we forget that practicality is not in second place, and especially when we already live in a house, practicality comes to the fore.
The opinion about the aesthetics of pipes inside or outside is greatly inflated. Almost none of the guests will ever pay attention to this, because few people even understand in construction, and even more so in technology, if you do not take into account the builders themselves. 
Now we will share valuable experience, which may make you think a lot, or maybe help you make the right decision.
- The case that happened with us.
- A friend’s case.
- The case of familiar professional heating installers.
The heating was completely done, the first start-up was made, and they began to live without grief. But at some point, the boiler gave an error that his pressure had dropped. Those. it fell a little and at some point reached a critical point. They walked in, looked at radiators, pipes, taps - everything is fine, everything is dry everywhere. We added liquids to the system and then we live happily ever after until the same problem arises again. Check again and refill. In general, at some point in the corner behind the cabinet a damp spot was noticed. Let's move and there it is. At the corner connection, a drop of liquid, and the puddle is not small anymore, it just absorbs itself and that's it. What a relief from the thought that this was not happening inside the wall !!! Quickly drained the fluid, cut out the corner and soldered a new one. Since then, everything is fine. And it was necessary in the corner, and even behind the closet ...
We are familiar with the builder with experience, he also did water floor heating. Everything was poured into a concrete screed and a small leak also appeared. I think you should not talk about all the charms of repair.
They also soldered everything, the whole system is designed to the smallest detail, a start is made, and water does not circulate. Everything that was possible was checked, many pipes were cut, since everything was outside. In the end, it turned out that when soldering pipes one edge caught on another and stretched out with a thin film and that's it. While we were able to find this place, everything was “turned over”.
We told the real cases that occurred "before our eyes." Similar stories are full of professional installers. This once again tells us to think very well: whether we want to hide the heating pipes in the wall or not.
This material represents a very subjective point of view. And it was written only because such material did not catch our eye when we made such a decision.