House warming of the aerated mineral wool

With each passing day, with each cycle of introduction house being built under the project "HOUSE OF THE YEAR" with Forumhouse, approaching to become a dream come true of one of the families of our craftsmen. IN project history It can be traced at every stage of the work, and at the moment already under insulation walling mineral wool. This article will disclose all aspects of the process, not only by the example of our house, but also the technology in general. Its secrets in the master class format for everyone to reveal the professionals:

• What causes the need for insulation of walls.
• What determined the choice of insulation.
• Technology insulation walling stone wool.

Why is it necessary insulation

In aerated porous structure, whereby it is characterized by low thermal conductivity - in dry a structural unit, this coefficient varies 0,096-0,14 W / (m · ° C), depending on density. However, in the masonry, even with minimum thickness to the adhesive joint, aerated thermal conductivity increases.

This occurs due to increased humidity, and due Laying nets and webs, and through a variety of metallic fasteners.

If, in accordance with the method of use snip temperature fields, given the outputted coefficient (0.7) the thermal resistance of the standard wall thickness is less embedded in the regulations.

Obtain 3.65 0.7 = 2.55 · m² · ° C / W, against the required 3,13 m² · ° C / W (for Moscow region). That is, in a house built of concrete blocks 375 mm thick, the walls will actively produce heat without additional warming, which would entail an increase in heating costs. Consequently, aerated concrete to get an energy-efficient house that in the conditions of constant growth of tariffs for energy - one of the main tasks for the private traders, require the creation of a thermal circuit around the perimeter and not only protective and decorative finishes. The most effective is the outer insulation of facades.

Polina Nosova (leading technical specialists TekhnoNIKOL):

Outside insulation is preferred due to several factors:

• retention of a useful area of ​​the house;
• wall protection from temperature fluctuations;
• longer life of bearing structures due to displacement of the dew point (the zone of probable condensation) to the thermal circuit.

Why concrete blocks preferably stone wool

Modern thermal insulation materials market has an abundance of proposals on any constructive and purse, another thing is that not every heater will be effective with respect to the aerated concrete base. The main principle of multi-layer protecting designs is to increase the water vapor permeability of each subsequent layer, starting from the inside. Despite the fact that the controversy over the "breathing" of the walls do not cease, couples - one of the products of our life, and a certain part of it is displayed through the walls. For warming aerated concrete having a high water vapor permeability, shows materials with greater "capacity" and the mineral wool corresponds to this criterion.

Two types of facade systems the maximum demand - "wet" facade with thin-layer finishing plaster and hinged ventilated facade. In the first case, the steam will be output from the walls of the heater, and from it - through a few millimeters and the reinforcing plaster layer. In the second - the steam will be drawn through the vent gap of a few centimeters between the insulation and the facing screen.

But if the thin layer of plaster can be applied on other grounds, the ventilated façade system of norms Fire allowed to use only non-flammable thermal insulators, and the group NG, only mineral wool.

Polina Nosova:

Fire safety can be increased at home, usingfireproof insulation - the melting temperature is more than stone wool 1000⁰S. During a fire in a private house so the heat is achieved in a couple of hours after the fire, this is enough time to save and households, and valuable property. It is important that even the melting is not accompanied by the release of toxic gases, and high smoke generation.

Technology insulation walling stone wool

ventilated facade system with veneer siding - one of the most popular among private traders, so it allows to neutralize all the errors the base, and is also available in terms of self-fulfillment. If over time under the influence of heaving forces or for other reasons in the masonry cracks, mounted facing the screen will not be affected. And given the fragility of AAC and its insistence to the strictest observance of technology, many prefer samozastroyschiki facing a more durable topcoat. Thermal insulation of aerated concrete walls with stone wool for finishing siding or other facing materials is carried out in several stages.

Training

When the insulation during the renovation of existing buildings with walls removed all functional and decorative elements, the surface is cleaned of dirt, soil, if necessary. If there are doubts about the load-bearing capacity, the base is checked by tapping with a hammer. Strong irregularities must be removed (projections) or repaired (cavity). With insulation in the construction process from the walls of the remnants of the solution are removed. If, before the work was heavy rainfall, you must give the box to dry.

Application markup

Before mounting battens using a level on a wall or leveling applied markings, on which will be mounted and frame members. The distance between the vertical battens beam depends on the dimensions of the insulation.

Polina Nosova:

To become vraspor plate without forming cracks and without deformation and tight against the wall, is marked on the vertical axis a distance of 10-20 mm less than the width of a heater (length in horizontal laying). If the width of 600 mm, the distance in the gap (between the inner faces of the timber) must be 580 or 590 mm.

 Installation of vertical posts

Since the total absence of heat leaks through cold bridges guarantees only a two-layer insulation with overlapping joints, first to the wall of the markup is going vertical battens. timber have the same thickness plate, usually lumber 50 × 50 mm. For aerated concrete racks are fixed on special fasteners as for light cellular concrete conventional dowel-nails or screws used for other reasons, are not suitable.

Stacking the plates in the vertical frame

The thickness of the layers is chosen on the basis of heating calculation regions enough for most common insulation thickness of 100-150 mm. No shrinkage and high elasticity plates simplify technology and mount mineral wool without additional fixation, laying between the beam vraspor. If necessary, plates are cut with a knife or hand saw with fine teeth. If the assembly of battens failed to sustain the desired distance, large cracks can be filled with plates segment.

Mounting the horizontal struts

After laying the first layer is applied by counting horizontal frame, also using a level or leveling.

The distance between racks also depends on the dimensions of the slab minus the seal bar dimensions are selected under the plate thickness.

Location of the second row is a horizontal beam by virtue of the fact that a further frame for the lining material will be attached to it in a vertical arrangement of 400 mm under the siding.

Laying tiles in a horizontal frame

insulation plates vraspor stacked, offset seams, which allows you to completely get rid of cold bridges, even with the use of metal fasteners for mounting uprights.

blanket

To protect the insulation from the weather and allow condensate over the heat output contour fit vapor permeable, vlagovetrozaschitnaya membrane.

Polina Nosova:

The membrane is unrolled horizontally, starting from the bottom row to the horizontal furring web is fixed by means of a stapler, an overlap between the webs should be at least 100 mm. Seams necessarily insulated with a special double-sided tape.

Above the membrane elements are fixed under the fastening system facing the screen, between the installation guide and a membrane liner creates an air gap of 30-50 mm, which will provide the optimum mode insulant operation. Step fixing guides is 400 mm, if the topcoat mount technology does not suggest that size.

Despite the prevailing opinion that the usefulness of warming is questionable, since the costs significantly exceed the potential savings in energy, even in the long term, and practice prove teploraschety otherwise. Aerated concrete house, insulated with rock wool, it is not only comfortable, but also cost-effective accommodation.

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