arch. Plamen Petrov

"Three Wells" Shelter

Module "A"

- The module is made of steel-concrete shell, guaranteeing strength and durability
- It has its own base but can also be mounted on a supporting structure or slab;
- Ability to arrange landscape, and in structures - area and level;
- Vandal resistant module - concrete walls, floor and ceiling; Window glass blocks 25x25;
- Can be with different interior equipment and furnishings; - Made of recycled materials; - Possibility of delivery by helicopter, easy and quick installation and disassembly; - In the TIR container 2 items are collected. Standard modules measuring 270 x 350 cm;

Module "B"

- The module is prefabricated;
- Function: providing electricity and water.

- water collection and storage tanks;
- solar panels;
- supporting structure and security panels;
- rechargeable batteries;
- stands for antennas and equipment.

Ideal solution for "Three Wells" shelter

- The proposal is for a composition of 6 pcs. A-type modules stacked as Lego-elements, on one level;
- Modules type "A" are mounted on a concrete plate measuring 6, 00 x 5, 00 m, cantilevered with 1/3 length. Shelter total area = 84 square meters;
- It is also possible an economical version of the composition - from 4 pcs. A-type modules, in which case the total built-up area will be 56 square meters;
- Modules type "B" (2 pcs.) Are mounted on a prefabricated structure at a height of 3.00 meters above modules "A";
- On site are built 2 pcs. Fenced walls of glass blocks 25x25 cm, septic tank and internal fireplace.


Kuncho Cilkov

The project envisages the construction of a modern shelter - sustainable structure made entirely of natural and / or recyclable materials.

The assembling can be done on site without specialized tools, from pre-assembled components that are packed in a standard 20 foot container. It is also possible to pre-assemble the module and carry it by air due to its light weight.

The geometric concept is subject to strict and clear forms, contrasting in the natural, undeveloped environment.

The project envisages the deployment of two identical structures - one closed and one open. It is possible to perform them step by step.

Inside, plywood benches and modular movable cubicles are planned. The benches will be openable and will allow for different types of equipment (batteries, first aid kits).

Poster frames will be suspended on the walls, with different types of information and instructions.

A photovoltaic panel will be installed on the roof and a light beacon will be installed on the facade.



The volumetric solution of the shelter is entirely related to the situation, the specific characteristics of the mountain and the energy concept of the building. In order to fit the shelter into the natural environment, a look of massiveness and similarity with a short scale is achieved through the use of only one material for the walls - gray fibro-cement sheets with a linear texture located at different angles.
Contrast is provided with a stainless steel door and roof cover in yellow to make the shelf visible and recognizable from a distance, and to enhance its function of a landmark and repertoire in the middle. For night shelter recognition, it is proposed to use innovative solar cement boards to emit blue-green light at night without the need for electrical power.

The shelter is a module, composed of small elements and is planned to be built entirely in place. For the construction of larger structures, the module can be multiplied by modifying (dropping the door) in the direction of the long axis of the building. Thus, it is possible to obtain a larger room or two rooms with a common foyer depending on which side the additional module is placed on.



We believe that the new shelter will become an emblem and attraction for all who love nature and the mountain. We offer the use of bright colors that will be noticed from far away and will become a mountain repertoire. This is our concept VITOSHKO LALE. The construction used is simple, modular, easy to implement and transport. As in the LEGO Kids' Game, we rely on the many variants that a kinetic structure gives us to make our SHELTER a very comfortable place for all seasons and all weather conditions. There is a wealth of possibilities, by repeating the modules, to obtain different variants of covered and open spaces.


SVArchitects - Stefan Vankanov

The shelter is situated in the area of "Three wells" in the Vitosha Nature Park, in the immediate proximity of the shelter passes a marked trail, providing a tourist route from the village of Vladaya, in the "Golden bridges", Kumata hill, "Konyarnika" The main purpose of the shelter is to accommodate the passing tourists by providing shelter, resting place, protection against adverse climatic conditions, as well as the opportunity to provide Information about Vitosha Nature Park, connection with the Road Transport Company, opportunity to charge small mobile devices to access the Internet and more.

The place where the shelter will be located is characterized by its inclined terrain, numerous bulky rocks and thick bushy coniferous vegetation. The project presents a small compact single-storey building with dimensions of 470cm x 460cm, oriented on its long side in the direction southeast-northwest, parallel to one of the boundaries of construction.

The entrance of the gym is on its south-eastern side, according to the access to it, the specificity of the terrain and its architecture.

Because of the steep displacement of the terrain and the established on-site conditions, the elevation + 0.00 = 1967.70 was adopted.

The slight lifting of the shelter floor above the ground will favor its protection from the high level of surface water caused by melting snow and heavy rains in the spring, and will also allow for good ventilation under the floor.
The shelter is designed as a one-dimensional volume and function body. It consists of two identical structural modules of a simple but robust and lightweight construction that allows for the transfer, assembling and disassembly and two architectural modules selected from our conceptual schemes that best fit the site and meet the design requirements. Each architectural module is made up of a basic structural module, clothed from the outside with fibro-cement elements on the facades, covering the floor, and inside lined with wooden panelling on the floor, the walls and the ceiling. For filling between the inner and outer encircling elements it is envisaged to use pressed stone wadding with a thickness of 16 cm, providing protection for the construction and thermal insulation of the interior space. It is envisaged to use a reinforced double-layer waterproofing membrane with high vapor permeability laid on hydrophobic plywood under the roofing of fibro-cement elements.

The furnishings are designed to be simple but durable, consisting of two wooden beds with a mass-transformable middle part and two benches with raised seats and lower storage boxes.

The project envisages the use of ecological, long-lasting, light but robust and easy to install and dismantle materials, as well as the use of on-site stone remains from the destroyed shelter.

The complete energy independence of the shelter is provided by the use of the IBC SoloHome AC 1000/24 photovoltaic system consisting of 4 solar modules, a battery, a charge regulator and an inverter, enabling the supply of 10 small mobile devices, internal LED lighting, External LED lighting and signalling, and the power supply to the VSAT terminal to provide satellite Internet access. At extremely low temperatures and for life-saving purposes, the use of an infrared heater mounted in the ceiling is foreseen. The use of the Tooway ™ satellite access system is envisaged.


Ivan Kiryakov

Energy: photovoltaic panels which formula laterally sunny radiation; fitted to flexible steps of a pyezocristal polymer which converts vibrations from the wind in energy; air jobs assisted to achieve heating or cooling. Battery loads are fitted in the floor panel.

Natural light and view: luminous leather "windows" from transparent aerostat membrane where the internal pressure creams the structure of the structure and function as an insulating air bag.

Facades: the characteristic form of the purpose does a recognitional structure of the Bulgarian mountain, which may be transformed in all extreme condition Facades.



The shelter is not a house to live, it is for saving lives "- almost every conversation of trying to understand our task best, it was like that. And that is why conversations were many and with different people who would have been the same in a single situation: when the shelter would save them. We spoke to sworn mountaineers, amateur tourists, people who were only a few times in their lives in the mountains, skiers and snowboarders, we studied the location of the shelter, the features of Vitosha, the contemporary solutions for other "survival capsules" And the latest technologies in the field of sustainable design.

The accumulated information broke into several challenges that formed the principles of the ball.
The environment forms: the shelter of 2050. Is nothing different from the shelter of – 2017 year?
Intelligent resource utilization: besides generating the energy it needs, the sustainable building uses it optimally.
"The most sustainable thing is change": technologies are constantly developing and the shelter of 2017. Must flexibly provide the opportunity for integration of those of 2050.

Human behaviour can change: vandalism and ruin are a matter of design.
The shelter seems to have been formed by mountain conditions. Unobtrusive but high-tech. Reflects its surroundings to stay unnoticed for people who are not looking for it. He is smart: in bad conditions, he immediately indicates his location to the person in distress and shelters him.



The shelter is a small building with dimensions of 4.20 / 4.20 m. Its shape is compact, it is a module that can be connected to another one on each side. The load-bearing structure is entirely of wood, except for the bases that have steel profiles. The walls are panels with a wooden frame and can be dismantled by connecting two or more modules. The contrast between the facade materials makes the shelter visible from afar.

Under reduced visibility, a red light signal from the wind turbine mast will guide tourists. The capacity of the shelter is 9 people.



Today's climate change challenges require architects to focus on creating a regenerative architecture that creates a habitat with natural materials that have a positive effect on the conservation of the natural environment.
Designing a small object like this could not cover all the guiding principles in creating such an architecture but could show the application of one of them.
It is desirable to seek the creation of a regionally specific architecture, in such cases that uses local natural resources as building material.

Regenerative architecture is distinct from the traditional one in that it recreates much of the natural resource used. This is especially true of the different tree species that adsorb carbon dioxide during their growth and subsequently become a future building material. We must try to minimize the use of existing resources and strive to close the cycle between what we use and what we create.



The project is a shelter in the place "Three Wells" in Vitosha Nature Park, the aim is to create a sustainable building, providing shelter in critical climatic conditions. The effort to use durable, recyclable materials is critical to the choice of a used marine container that is easy to transport, mount, dismantle, move, and expand on a modular principle.



The project is a solution for a modular shelter in the mountain. The basic idea is the easy transportation of both individual elements walls, floor, roof and all transport. The shelter interacts with nature through natural wood lamellas and recycled materials. Designed with sheet metal (titanium zinc), the shelter will have the necessary weather resistance and will stand out from the surrounding environment. It is envisaged the installation of an autonomous photovoltaic system, considering the location, as well as a wind turbine if needed. The battery system and the mobile phone as well as a first aid kit are separated 2.40m from the elevated floor. Without USB ports to charge one from the walls. The shelter is designed so that a second entrance door can be opened on each of the walls, given its modular use.


Petar Ahmakov

The LAPIS shelter project in Vitosha Park is not a project for a single building in several variants but is a demonstration of the possibilities of combining the elements we designed to achieve design goals.


The design of the modular panel for walls, roofs and floors (2,42x4,84m) is dimensioned for a ribbed (triple) thermo pane made of two layers of hot galvanized cold-bent steel sheet 0,5 mm thick and an insulating layer of polyurethane foam or Stone wool with a total thickness of 78 mm (along with the rib). The ribs are calculated to absorb the loads on the short side of the panel - 2.42 m and additional steel beams inside the panel assembly, every one meter away. The modular panel is embossed with a steel profile (hot dip galvanized cold-bent and dust-injected PVC paint), which together with the thermo pane sheet and the adjoining profile when touched by the modular panels at an angle of 60 to 90 degrees form a beam.


Kapitanov, Milenov

The Foundation: The idea is to be made of reinforced concrete and to be cast in a convenient place and then transferred to the place by a helicopter. For this purpose, it must be as light as possible, through cavities of a different nature: a cavity for storing supplies and first aid is provided, a battery cavity storing the electricity produced, gullies allowing the passage of rainwater through the foundation on the natural slope of the ground, For the installation of frames forming the main volume, as well as additional lightening cavities to be filled with stones remaining from the previous shelter in order to give additional weight and stability after being Placed on the ground.




COSHELLTER is a modern mountain shelter that is unpretentious, durable and easy to craft and fits into every terrain. The concept is inspired by the typical for mountain regions of Bulgaria knit baskets, which are extremely healthy and light for their volume. The idea is to knit a large "basket" with dimensions of 5.4 x 3.6 x 3.6 meters and a total weight of about 200 kg of thick cornet wire, which allows it to be delivered by helicopter. It is positioned on the spot by volunteers. Its bottom is filled with mountain stones to be stabilized and heavy.

Above the stone ballast, a wooden floor structure is formed and a wooden door and an access ladder are installed. The outer surface of the structure is dressed with wooden shingles securely attached to it by wire links. The shelter is easily adjustable to any slope of the terrain and is placed on existing rocks or wooden structure to be over the typical snow cover in winter. The flowing thermo-effective form of the shelter makes it safe to protect against bad weather. Inside, it offers everything needed for distress tourist - comfortable wooden bunks for sleeping bags, first aid kit, telephone 112 technical module with batteries that are charged by solar panels on its roof or freestanding wind turbine nearby. The interior and exterior of the shelter is minimalist, with no surplus, because maintenance in the mountains is difficult. Deliberately not provided glass elements, as practice shows that all mountain shelters by the time they are walled or clogged as problematic.


Another studio

After a detailed survey of the plot and the possibilities for a modular solution, the shelter is designed as consisting of 2 square modules with an external dimension of 2.30m x2.30m and a sloping roof as part of the module. The height of each module is 2.30m / 3.77m. The shaded roof helps to keep snow, maximizes solar gains and contributes to the inclusion of the shelter in the mountain environment.

The two modules are in contact with the terrain by means of metal legs around which is formed a base of gabions of in-built stones and parts of the old shelter bases. Among them, within the plot there are separate seating and resting places.

The shelter provides the opportunity to observe the mountain and visually connect with the paths and the nearby tourist routes. Additional window shutters are provided to close in storms and strong winds, and can also be lifted and provide shading (see Axonometric Diagram 2).

The size of the module is determined by the minimal internal / light / size with the possibility of shaping a sleeping area - placing a bed with a length of 1.90m. The square in the plan module allows for multiple rotation variations of the modules relative to each other, resulting in 14 possible positions for the two modules within the plot. This, in turn, allows optimal configuration of the structure in view of climatic and other situational features. *

* The layouts displayed in the visualizations are exemplary, their exact location and orientation can be determined in the Technical Design phase after detailed study of climatic conditions and renewable energy sources / shading elements, wind rose, etc. /.



Taking inspiration from balkan traditions and the surrounding natural beauty, Freedome, utilises Bulgaria’s natural resources and local skills to offer a revolutionary zero-carbon shelter. Top of the range technologies are used responsibly to offer appropriate functionality, while maintaining its sustainability and affordability. It generates all of its own energy and offers optimal energy efficiency to ensure that all of Vitosha’s visitors find a sustainable, comfortable and resourceful shelter during their trek.