Building an extension to the house of foam blocks

Foam concrete is one of the latest developments in the construction industry. This material has many undeniable advantages and is very popular. Its cellular fractional structure is characterized by low thermal conductivity, which allows not to be wasted for additional insulation. Light weight and dimensions exceeding the size of brick or sawn stone( standard size of the foam block - 600х300х200) allow to save considerable sand and cement during construction.

Due to its unique porous structure, the foam blocks have good sound insulation. These same properties create the effect of a "breathing" wall, which prevents the addition of condensation, which causes the formation of mold or fungus. For the production of blocks of foam concrete environmentally friendly natural ingredients are used.

Planning and drawings of the extension from the foam concrete to the house

First of all, determine the location of the extension, its dimensions and height. It is important that the roof of the structure is slightly below the roof of the house.

1. Provide and plan communications routes. This must be done at the initial planning stage, otherwise you will encounter the problem of their laying after the construction of the walls.
2. It is also necessary to provide for the possibility of the formation of a deformation seam in the places of joining of the extension and the main structure.
3. The doorway in the extension can be arranged in the place where the window is located on the outer wall of the house, and can be cut into the supporting wall. In this case, consider external loads.

Arrangement of the foundation for the construction of the

It is easier to build an extension to the house from foam blocks by hand than from traditional materials. The foundation for an extension of the foam blocks is made by a band-fill method from concrete or from the elements of the future structure.

1. The depth of the base depends on the height and weight of the extension. For a small building it is enough to dig a trench 50 cm deep and a width of up to half a meter along the perimeter. At the time of laying the foundation of foam blocks, it is important to pay attention to the insulation and waterproofing of the underground part of the structure. The foundation is subject to groundwater and temperature fluctuations.
2. The moisture absorbed in the material in winter can freeze and contribute to the destruction of the substrate, and the strength of the walls depends on its strength. At the beginning of construction, on the zero cycle, work on insulation and waterproofing begins. For insulation use expanded polystyrene, mineral wool, foam and other materials.
3. Laying of heat-insulating boards is made directly at the time of waterproofing. Dry the foundation is coated with water-repellent mastic. To it are fixed the plates of thermal insulation, covered with hot, about + 70 ° С, bitumen. There is no need to strengthen them additionally. When backfilling the trench, the earth will press the insulation to the base. Elements of heat-insulating material should protrude above the ground level by about 50 cm.
4. There is another kind of basement insulation - polyurethane foam. This new and more expensive tool, but its application solves the issue of maintaining the temperature and the implementation of waterproofing at the same time. By means of a special machine, the polyurethane is sprayed with a layer of up to 5 cm onto the foundation surface. The coating of this thickness corresponds to 12 cm of ordinary expanded polystyrene.

These materials successfully cope with the task of warming and waterproofing the house and prevent the emergence of cold bridges, which, in turn, protects the dwelling from the occurrence of mold and fungus on the inner walls.

Construction of walls for an extension of foam blocks

On the frozen and perimeter of the base, a ruberoid or rubemaster can be laid. This layer, laid along the level of the "dew" point, prevents penetration of moisture above the floor level.

1. When laying the first row of a wall of foam blocks, a conventional cement slurry is used. Construction, as usual, should start from the corner. Spread out 3-4 horizontal rows of foam blocks and gives them time to grab. It is from an hour to three or four, depending on the cement glue composition used.
2. In the places adjoining the extension to the wall of the house binding bindings are driven. For them, scraps of a metal rod or armature with a diameter of 8 to 10 mm and a length of about 30 cm are used. The rod is driven into the wall to half the length, and its protruding part should fit exactly into the seam between the blocks of foam concrete.
3. When constructing walls, always check the horizontality of the rows and the verticality of the construction by level and plumb line. The last row of the wall is made taking into account the laying of the roof beams. It is possible to make a gable or one-track, as well as a cascade roofing extension.

Exterior and interior decoration of walls of foam concrete

1. The foam concrete itself has all the necessary technological properties for erecting any structure. When creating extensions from foam blocks, the outer walls need only decorative cladding.
2. External walls can be plastered, the solution adheres well to blocks of foam concrete and does not crumble during use. A good option - to finish the construction of siding. It all depends on how the outer covering of the structure will be combined in style with the main structure.

Interior decoration is made, as in an ordinary house. Apply the plaster layer, which then shpaklyuetsya under painting or wallpaper. Consider the options for interior decoration with plasterboard or wood panels.