Concrete products are a versatile and durable building material from which you can quickly erect buildings for any purpose. Cellular types of concrete have recently been widely used in the field of low-rise housing construction. In addition to the significant construction speed and reliability of the operational qualities, the walls of residential buildings made of foam blocks have a low degree of thermal conductivity, which allows owners to reduce the cost of insulation and heating of houses. But there are also a number of reasons why the external and internal decoration of walls made of foam blocks is also necessary and performs its functions..
Lightweight type of cellular foam concrete is characterized by a porous internal structure. The presence of air bubbles inside the blocks makes it possible to increase the heat-shielding qualities of such a building material. However, one of the notable properties is the high vapor permeability, which affects the natural exchange of air between the external and internal environment. Thanks to this feature, the indoor microclimate always remains comfortable for humans.. It is necessary to choose the right exterior decoration for houses from foam blocks, which will perform several important functions:
- protect the walls of the building from atmospheric influences;
- promote normal heat and humidity exchange, affecting the microclimate of living quarters;
- prevent destructive acid condensate from reaching the surface of the walls;
- perform the task of additional insulation of wall surfaces;
- correspond to the general architectural and artistic design of the facades.
In countries with warm climates, there are cottages built of foam concrete with perfect brickwork and neat seams. The lack of finishing is caused by a small difference between internal and external temperatures and practical feasibility, which at the same time negatively affects the aesthetic qualities of buildings.
This is due to the fact that acid precipitation easily penetrates into the unprotected pores of aerated concrete, launching destructive processes in its structures..
The walls begin to become covered with uneven black spots, chipped in places, with traces of external pollution. In cold regions, the destruction of open walls made of foam blocks can occur at an accelerated pace, due to multiple expansions of freezing moisture in the pores of light, hygroscopic concrete.
How to finish on the outside?
The main feature of cellular concretes is their moisture permeability, which implies the presence of good waterproofing qualities in any materials used for external finishing.. At the same time, the external finish must reliably protect the wall surfaces from precipitation falling on them in the form of rain and snow. We must also not forget about air exchange processes, the slowdown of which leads to the accumulation of moisture inside the wall, which is expressed in the appearance of mold and stagnant air in buildings..
It is possible to inexpensively revet a house from foam blocks using a layer of cement plaster or PVC plates, but such technologies, which contribute to the formation of condensation, will negatively affect the state of aerated concrete and can lead to its rapid destruction. Outside the house, you can also attach facade thermal panels that imitate the original types of brick or natural stone masonry. The aesthetic external qualities of this modern type of finish make it attractive, and the technical characteristics have interesting properties. Within a short time, with the help of thermal panels for facades, you can get a completely new exterior of the house, which has increased protection against cold climates. The multi-layer structure includes several functions and consists of a decorative outer part on an insulating, rigid base.
Fiber cement boards
Fiber cement products contain only environmentally friendly components, including cement and mineral wool. The peculiarities of the internal structure, where the cement sealant is penetrated with mineral wool fibers, make this facing material reliable protection against possible low temperatures in the external environment. Fiber cement is resistant to corrosion due to chemically aggressive sediments, decay and direct exposure to ultraviolet rays. At the same time, this protective material leaves the walls with the possibility of air exchange and can be used in conjunction with additional insulation.
The design of finished products made of fiber cement allows you to quickly and efficiently cover the house with slabs with any kind of texture and color.
In regions with the warmest climates, ordinary or decorative plaster can be used as wall decoration from foam blocks.. It reliably protects walls from the penetration of excess moisture from atmospheric precipitation, especially when protected with paint for facade work. A high-quality result can be obtained by plastering the surface of the facades in compliance with the technology. The coating of foam blocks with a solution is carried out in several stages. Each next layer of plaster mixture is applied after the previous one has completely dried..
It is important to observe the temperature regime of operation, since when the thermometer reading drops below 5 degrees Celsius, the wet solution can crack when solidifying, and above 20 degrees, it manages to lose moisture before the necessary chemical reactions occur, and immediately crumbles. In order to protect the walls from moisture, they must be properly prepared for plastering. Preparation consists in coating with a primer and fixing the reinforcing mesh with dowels.
Painting aerated concrete should retain its main positive qualities, which can be lost if you use unsuitable types of paints for this building material. A continuous layer is able to stop the exchange of air between the street and the interior, which will lead to the accumulation of moisture inside the walls.
Vapor-permeable types include facade paints based on silicone and a special primer.
Compared to other cladding materials, working with finishing bricks requires proven skills for high masonry accuracy.. The complexity of this type of finish makes it not always available, and the large weight of the brick requires increased strength of the foundation.. Brick cladding requires level measuring instruments, trowels and a suitable sand-cement mortar technology. For natural ventilation of the walls, one must not forget to leave small holes, regardless of the use of additional methods of insulation.
Finishing of foam blocks with natural stone should be provided even at the design stage, since in this case you will need a more solid foundation that can withstand not only the weight of lightweight concrete, but also heavy decorative material. Stone wall covering made of foam blocks is one of the most expensive finishing methods, which is distinguished by its strength and durability..
In terms of facade design, natural stone is a solid and beautiful solution..
Modern cladding with facade panels is widely used to protect the walls of houses built of lightweight concrete. In addition to corrugated board and sandwich types of panels for external cladding of facades, in this case, metal, vinyl or fiber cement siding is used. To fix the ventilated panels on the walls of the house, first, lathing with wooden planks is made. After installing the frame, waterproofing and insulation are laid, which are then closed with correctly laid siding.
Interior finishing options
To create good sound insulation inside the house, it is necessary to sheathe the foam block surfaces of the premises with clapboard or drywall. You can cover the room from the inside with ordinary gypsum plaster, but in cold regions, wood trim will serve as the best insulation..
It has become traditional to sheathe interiors using a frame, but you can do without it.
Wooden lining is mounted on slats that are held on the walls with dowels. A cheaper material is plasterboard, produced by the industry in several varieties, which can be used to cover walls even in rooms with high humidity. Plasterboard is glued to flat walls with a primer and gypsum glue, which saves money on installing a metal frame.