077 - Round Straw

Reutova Yelena Vasilyevna

Belgorod, Russia


Straw is a extremely available and cheap material. The advantage of straw houses is the low cost of their construction. When building a house of straw strongly reduced the anthropogenic load on the natural environment, as the straw is environmentally friendly and renewable material. Less lumber is used, whereby forest resources are saved.

From straw bales are strong enough and durable. This is a unique material which is superior in its thermal and physical characteristics of all known building materials (brick, foam concrete block, wood). These properties of straw bales allows in times to reduce the cost of heating the house. The fire in straw bales high, as with increasing density the ability to burn is significantly reduced due to the lack of oxygen inside the blocks. Straw also has a high sound insulation property. It has a tubular structure so that the presence of air in the material gives very good sound and thermal insulation properties. Straw houses are also good at repairs, because they are easily assembled and disassembled. For starters, the layout plan on plot on the axes. The house has a rectangular configuration in plan. The dimensions of the house in the extreme 1-2 5,5 m axes, the axes A-B 3,0 m. Line the walls carefully removed vegetable layer of soil 200-250mm.

Belt poured concrete foundation height of 1.5 m is laid two layers of waterproofing material /roofing material/. Set the upright frame in accordance with the scheme of the house, on the border of the location of windows, doors with step 1,8-2,0 m.

The projected building is one storey. Home variable height: 2,400 m - 3,90m. Erected a framed house of timber. Frame for due to the dimensions of the structural grid threefold safety factor on bearing capacity and easy installation of interior and exterior walls. In the corners of the walls are diagonal connection 50x100x5000mm. For voltage compensation at nodes designs use metal angles and stripes. Between racks put straw blocks with thickness of 400mm by 2400mm height. Units width 600-1200mm. Additional bond between the blocks is performed in every fourth row of blocks with metal rods. Align the walls with a hand saw or other cutting tool.

Installed inside a hydroinsulation. The walls are plastered and painted. Before the plaster is stuffed metallic mesh for good bonding of straw and plaster. Typically you will need to plaster the outer and inner side walls A with a minimum thickness of 50 mm. Layer of plaster prevents splashing and wetting of the straw, ingestion of rodents, rotting straw, and increases resistance. For smearing the blocks of plaster and straw walls, you can apply a clay-lime mortar.

The first layer of plaster should be of a thickness of 25 to 40 mm, and the second (lining) layer - 2...3 mm.

All chimneys and ventilation channels are performed in neramani pipe 150mm diameter with insulation refractory wool "Rocwool" 50mm thickness lining the channel with bricks with a thick-ness of 120mm. Points of contact of wood and brick are insulated by sheets of asbestos with a thickness of 8-10mm.

The frame truss system double height 400mm gives-fold safety factor to normative snow load 150kg/m2 .And also gives the opportunity to insulate the roof with straw bales of thickness 400mm. Trusses are mounted on the plate already assembled. The plate itself typically consists of two boards, stacked on the upper plane of a wall, fastened Fcross strips through each meter. Provided sufficient overhang of the eaves to protect the walls from rain (at least 60 sm).

One of the most important criteria when designing an energy saving house is the orientation of its Windows in the direction of sunlight. In the roof there is a window on the South side of the building that provides I better illumination of the house. Due to the fact that in winter the sun is much lower above the horizon than in summer, the rays hit the window under a more favorable angle. This means that the Windows will get a lot of light, which will heat the house. At night this heat will stand out and warm residents. In a well-insulated house, this energy is significant portion of all the spent on heating, a fireplace have to sink a lot less.

For fixing of window and door frames used wooden stakes which are hammered directly into the wall structure. To make the plaster more firmly held on the wall surface, must be covered by a metal grid. In order to improve the moisture resistance of the mesh should also cover several inches of window and door frames.

Straw should be sufficiently compressed and be dry. Such a house requires at least two times less fuel in the heating season than any other house due to the fact that straw is a better insulator of heat than stone or even wood.

The building has a vestibule area of 1.9 m and a main room with an area of 13.9 m. In the vesti-bule is placed a refrigerator and a wardrobe. In the main room are two beds that fold into shelves (this allows you to efficiently use space), table, fireplace, armchairs.

The house has been designed porch area of 10 m, where you can be 1 not only in sun, but in rainy weather, take a sun bath or just enjoy picturesque landscapes.

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