Economical exterior finish aerated concrete - a personal experience

Construction of country houses of the various blocks is becoming more common, and one of the most popular varieties - aerated. However, unlike the brick structures, houses of aerated ensure adequate exterior finish that due to technical characteristics of the material. Variants of such arrangement of the facade are many, but most of them assumes creation finish layer or hinged screen that will fully close the clutch, as it is considered to be visually unattractive. But craftsmen with FORUMHOUSE went the other way and turned a lack of dignity and even to finish saved.

Feature AAC

High strength characteristics AAC provides manufacturing technology, unlike vibropressed species therein silica sand does not remain inert filler. During the chemical reaction under high pressure, it is converted to silicate strength comparable with a natural mineral.

Of course, it does not disappear inherent in this group of materials high vapor permeability and hygroscopicity, while buildings constructed Before the war the Soviet Union, and to this day are without finishing not only not going to fall apart, but also look better than many more "Young".

In the manual finishing masonry of autoclaved aerated concrete, designed by G. AND. Greenfield (published by the St. Petersburg Polytechnic University), fully acknowledged the possibility, but not a necessity. As stated in the summary of the physical fundamentals - "Aerated concrete constructions without finishing layer are active fluctuations in temperature and humidity. This surface layer is 5-30 mm thick can be regarded as protective with respect to the buried layers. " Nevertheless it, the author recognizes the desirability of finishes, including its main aim in the field of low-rise building raising decoration of buildings.

As for additional insulation, then by cellular aerated reduced thermal conductivity most regions, it also is not necessary when sufficient wall thickness (about 400 mm). Consequently, the use of plate material for insulating plaster layer or under the hinged screen - not so much a necessary measure, as the realization of individual aesthetic preferences in the presence of Finance. As well as a thick plaster layer directly on the masonry. And if someone is not willing or able to finish aerated concrete masonry dekorativki, siding or clapboard, it will not affect the performance and durability of the structure. Only on visual perception, and that - everyone has different tastes.

Chamfer instead of plaster and ventfasada

According to the technology blocks are placed on an adhesive mixture or a fixed special foam and even when using a conventional DSP seam thickness is minimal. Therefore, by increasing the attractiveness jointing - not an option, but the chamfer - completely.

Konstantin Y. (User FORUMHOUSE):

The walls are of aerated concrete - sufficiently smooth and the surface layer does not exfoliate. I do not want to plaster on a plane - not like that kind of finish. Guess chamfering on the blocks, we'll see that the walls are built of individual stones. Then priming and painting with silicate paint.

For a finishing layer for aerated imposed two basic requirements:

• To be sufficiently permeable and does not prevent the removal of residual moisture from the blocks after the erection of the box;
• In order not to worsen the conditions of the construction operation.

Silicone paint is just meet these requirements - they have a high vapor permeability and water repellency. Moisture will be free to go inside and can not penetrate from the outside, as rain falling on the surface, colored silicone composition, can not be absorbed and will slide down. Chamfer also help create the illusion of a large stone masonry, which will increase the attractiveness of the facade, and a finishing costs will be reduced by several times in comparison with other options. Such a method, even without the silicone coating, offers and G. AND. Greenfeld in its manual. Only in his version - white binder and coating hydrophobizator, good choice impressive compositions.

In addition to the economic feasibility of the method of finishing flats without plaster layer solves the problem inhomogeneities - when finishing on top with the time shown signs of a block layout and the wall is obtained raznotonnymi spots. With this effect faced by many homeowners from GB, chosen as the finish associated plaster (without an intermediate layer), including one of the members of our portal.

DmitryA4 (User FORUMHOUSE):

I'm only a few days ago, found out about it and, in general, saw. The bottom line is that after plastering and painting, followed by GB all beautifully and technology. But here at high humidity and frost appears drawing blocks in a wall - lighter unit itself, and the circuit (seams) darker. Maybe it's the non-observance of technology or something else, and the problem as it is not very serious, but to see such a moment you do not want on their walls.

As one option "treatment" zebra - applying an additional layer of plaster.

Gssdomru (User FORUMHOUSE):

Due to the use of different rendering system (not enough units, it had to purchase another manufacturer), the beginning of the show through the plaster on the pediments (it was summer). After some discussion, struck two more layer of silicone plaster - work, the effect disappeared.

initially Konstantin Y. I considered two kinds of facets - at an angle of 45⁰ on each edge or recess of rectangular cross section, but after I saw the facades with bevelled edges, rather make a rectangular unravel. In addition to being visually pleasant, even and implementation easier - no need to cut all the facial edge, enough vertical and horizontal or one horizontal row of already finished.

The method is not only interested Default, but also other members of the forum, Berestov just thinking about the process of mechanization.

Berestov (User FORUMHOUSE):

Device can be assembled from the corner to the grinder attached to it, equip diamond cutting disc for stone. Performance bude higher than the cutter - a dust must recycle not all chamfer, and only the amount of material equal to the cutting thickness, about 2.5 mm.

What he embodied, a chamfer of approximately 10 mm, the angle - 45⁰.

Member of the portal with the nickname AIVD the first house just paint - smeared defects repair mortar and sand (a piece of the block), brush, primed and coated with silicone paint. Tellingly, both outside and inside.

A second home began to build, already chamfer, colored silicone paint with a primer composition of the same line. In one layer, wide brush with short pile (rubbing the surface) to close the pores.

AIVD (User FORUMHOUSE):

Wanted to invoices, did not hide the stone, and emphasize it. The plane is necessary to withdraw the plaster, even a thin layer is expensive, and only then did his work. And a few minutes to spend no more difficult than plaster.

Konstantin (User FORUMHOUSE):

I. I gathered almost like a cutter Berestov, not only with the disc, and with a cylindrical cutter 80x25 mm with carbide teeth. For fixing ordered from Turner special nut for the mounting hole. Before laying is first treated with a vertical block edge after installation and adjustment - the whole series of top of the line, the remaining two-faced is not milled. The clutch is led from the angles at both corner stones milled outer faces and a horizontal (upper) milling for internal corners blocks performed in advance.

In yuikgg chamfer 2x1 cm, a depth of 1 cm, the cutter is also modified.

yuikgg (User FORUMHOUSE):

Fashioned corner to the housing on a small grinder with adjustable speed. Cutter collected from 5 diamond discs for stone. ATTENTION! After the rain to work hard, I changed two front bearing.If the chamfer is rectangular, then it can only be removed with one vertical side. After laying and leveling a series pass mill around the number in the horizon.

AND ipsdb its facade has decided not to burden, making the bevel, unlike previous faskorezov this - based on the conveyers.

ipsdb (User FORUMHOUSE):

Stand under the unit, focusing, and on top of the unit has made rail, which attracted a clamp. Rake has a width to a single clamp rail could pass block from both sides, simply and effectively.

Before painting the facade it is not yet reached, but plans for aerated for several years has not changed.

Rectangular or chamfer angle made by the cutter or discs - the viability of this option finishing the budget proved not only theory but also practice craftsmen portal, details - in the subject line. And to take it on board or opt for a more conventional "pie" lining - think for yourself, decide for yourself.

Another not the budget, but quite an interesting option without finishing plaster - facade wallpaper. Make imitation wood paneling, but less demanding to care, can be through fiber cement siding. Timbered want - please, at your service DSP and laths. In the video - the house of the collective mind and gazoblokov forumchan.