service: Architectural design
architect: Anastasia Brovarnyk
designer: Anastasiia Lisovska
Private house in the suburbs of Kiev with an area of 406 m2, located on the outskirts of the forest with a very interesting terrain. This will create a truly beautiful and sweet-hearted estate.
Danica acts in this project as the general construction contractor and supplier of materials, namely Passive House Block.
This material will allow to achieve the maximum energy efficiency of the building at such area. The technology of construction of houses by means of a fixed timbering gives on an exit very high indicators of tightness and reduces heat losses of enclosing designs to a minimum.
This is a real-time project that we are building in 2020
Below you will find a complete chronology of the construction of the house in the format of a video diary. And let's start, perhaps, first. In March 2020, nature remembered that there should be another winter, the flywheel of the coronavirus was gaining momentum in the world, and we were entering the site.
How does the construction of any house begin?
And if you answered - from the foundation, you are deeply mistaken. The house starts with a project - it will save you from mistakes and save a lot of money. But for us, the work began with the foundation, or rather with the preparation of the foundation for the foundation. The customer came to us with the finished project. The house stands on uneven terrain and the height difference, in some places, reaches 2 meters. On this basis, the foundation was prepared in accordance with all requirements. The boys rammed the trenches for several days, repeatedly pouring sand and gravel mixture. These labor costs were necessary to obtain a quality foundation that will not give the foundation anywhere to move or sag. The final touch of this stage was the filling of the base under the foundation with concrete. Filling was carried out using a concrete pump, and all concrete must be vibrated to avoid the formation of voids and leaks.
See how it was in the video below.
The device and pouring of foundation walls and pouring of a rough plate of a floor are the following stages stroitelstva.K them we started literally in 2 weeks. The weather has already begun to improve and it has become much more pleasant to work. For this stage, we used non-removable formwork blocks called ICF-Block.
What is ICF-Block.
This is a block of fixed formwork which consists of two plates of high-density polystyrene foam, interconnected by an adjustable mount. The fixture has guides for reinforcement and allows you to change the thickness of the poured wall from 150 to 400 mm. Styrofoam with a thickness of 50 to 100 mm acts as insulation of the foundation wall.
Thus, the use of this technology allows not only to speed up and simplify the installation process, but also to connect the 2 stages - pouring the wall and insulation. ✅ Sorry, but a little theory is just necessary
Installing blocks, checking levels and diagonals is not a particularly interesting process, so let's skip it. But it is worth noting that despite the height difference in the area of more than 2 meters, ICF-Block proved to be the best.
The second, but not the most important, stage is the reinforcement of the foundation wall. Here special attention is paid to the reinforcement of corners and adjacencies of internal and external load-bearing walls. In addition to the main threads of the reinforcement, D = 12 mm, and strapping, we used the same "L" shaped reinforcement. Why and for what Roman Semenyuk will tell in video, and here we will only write that it is really important and the majority of builders don't do it.
Our guys rushed into battle, but the necessary technological break allowed them to rest a bit, because it had to be quite a difficult process. The quality lies in the little things. It would seem that it can be difficult to backfill the foundation with soil. In fact, very few builders use compaction, and only a few do so by technology. For us, it's a few days of hard work to fill the soil by 15-20 centimeters and constant compaction. Upon reaching the required level, the gravel-sand base was filled in and it was also well compacted. Quality - in the little things
Armature of 12 mm, the cell of 200 on 200 millimeters and as a result one reinforcing grid. We pour concrete and we receive a strong base plate 120 millimeters thick.
This is a short recipe for a quality foundation for a private home. It took us a few weeks and only 7 minutes for you. Enjoy!
On the street in May. If you read this in the future, know that such a rainy May has not been for a long time. The rain did not allow us to work at full capacity, apparently the shore of our health. The pile of holidays and quarantine (yes, this is the first quarantine) delayed the process a bit, but nevertheless we followed the schedule and started laying the first row of walls. This very important process took almost a week and a half. The geometrically complex house and the large molding of the walls added some zest to the process.
We build with Passive House Block - a fixed formwork for the walls that combines three technological processes. We are talking about energy efficiency and that is why this material was chosen.
This material allows to achieve the highest indicators on tightness and energy efficiency of walls. It combines three technological processes in one:
- Construction of walls (concrete core from 100 to 420 mm);
- Internal rough plaster (gypsum plate of 30 mm);
- Warming (Neopor from 50 to 300 mm).
- Preparation of the basis under a wall (waterproofing);
- Installation of blocks;
Before installing Passive House Block, it is necessary to cut off moisture from the foundation into the wall. This is achieved by waterproofing the adjacent plane of the foundation wall. To do this, we use primer, mastic and roofing material. We will not stop on concrete brands, there are enough of them in the market, it is important only that materials were qualitative, on it it is impossible to save. At this stage there is one weak place - reinforcement. Strange as it may sound, but this is where the reinforcement can weaken the quality of waterproofing, as it "leaks" roofing material and moisture can penetrate through these places. Maybe but will not, because we are additionally melting these points, thereby minimizing the penetration of moisture into the wall.
But that's not all. The risk of moisture getting into the wall remains and for maximum protection we use concrete with a very high coefficient of moisture resistance - it is W-12. We pour such concrete only on the first row. We proceed directly to the installation of blocks of fixed formwork. First of all corners are exposed and already from them there is a "set" of a wall from direct blocks. An important point - the unit that cuts along the length must be at least 300 mm. If the cut block turns out less than 300 mm - cut 2 adjacent blocks. The leveling of the wall is on the inside, ie on the gypsum board. It allows to receive a smooth internal wall of a premise already with rough plaster plaster. Blocks are very densely joined by means of grooves and do not demand in addition any glue or foam. The first row acts as an armo belt. For reinforcement, 4 threads of 12 mm reinforcement are used and necessarily "L" -shaped reinforcements at the corners and at the junctions of the walls.
Filling the first row with concrete
An interesting process, but it is preceded by a very important stage - verification. The test usually takes from one full day or more. All angles, diagonals and sizes are checked. The level of the first row is checked by means of a laser level. In case of inaccuracies - they are immediately eliminated and checked again. And after a few days of preparation and inspection come a few hours of hard but responsible work - begins pouring the first row of blocks of fixed formwork Passive House Block concrete.
Concrete is poured at 2/3 of the height of the block, this is done in order to avoid the appearance of a "cold seam" at the joints of the blocks. After placing the second row, the joint of the concrete layers will be in the body of the block, and the next layer of concrete will be poured again at 2/3 of the height. Concrete must vibrate during pouring to obtain a dense quality wall without voids. Everything was shown to you in more detail in the video!
One of the most significant stages in the construction of a house is the erection of walls. Especially evident if the walls grow 30 cm up almost every day. The weather in May-June 2020 was particularly capricious. For weeks there were showers, in between we had time to expose Passive House Block and pour concrete. In general, if you remove a lot of holidays and the vagaries of the weather, then it took us about 3 weeks to fill the walls. Agree, fast enough. And this despite the fact that in our case, three technological processes are combined at once: - Warming (Neopor 300 mm);
Construction of walls (Reinforced concrete 200 mm);
Rough gypsum plaster (Gypsum plate of 30 mm).
The truth is worth clarifying here. If we managed to take the concrete in the morning, the team had time to prepare the next row of Passive House Block formwork and pour a new row in the morning. Next we will focus on a small life hack. Mortgages for engineering networks, so this will not surprise you. The technology allows you to hide in the walls of the mortgage for electricity, plumbing and ventilation. But here we used another trick.
The fact is that the facility does not have an approved design project and we do not know exactly at what distance from the control points will be switches and sockets. From this, in addition to the mortgage corrugation, on the inside of the gypsum board, to pour the concrete, we fasten a strip of extruded polystyrene. This solution allows you to move the placement point horizontally within 50 cm and not drill concrete.
Door and window openings. Simultaneously easy and complex process of the device. It would seem - became a formwork and lei, but not everything is so simple. The device of slots requires special attention and control. If you miss the level of the planes and "take away" them - when installing windows will have to sweat removing excess reinforced concrete. In our case, window openings are prepared at once under remote installation of windows. It is from this that the lower plane of the slot is not filled to the top. In this series, we showed the process of erecting walls using the technology of fixed formwork for an honest house. As a result of three weeks of work we have:
- Finished walls 330 cm high;
- Ready Perestenko;
- Flooded beams over large windows.
- The next stage - pouring the floor of the first floor.
Stay tuned, it will be interesting!