Insulation of facades apartments "wet facade"
Insulation system "wet facade" allows you to kill two birds with one stone to produce a decorative finish and insulation of the exterior walls. But why the facade of "wet"? The answer is simple: when installing material using the compositions, diluted with water. Of course, walls are not always wet, but only until dry mix.
Advantages and disadvantages
This type insulation of external walls applicable on almost all types of buildings, any design, any height. Insulation does not take the internal usable area of the premises and has a positive impact on their sound insulation.
Of the shortcomings can be noted only one – the relatively high cost that includes the cost of material (of course, qualitative) and the work of professional teams.
To conditional disadvantages are the limitations on the weather conditions: installation works are carried out only at positive temperatures. Shouldn't it drop below freezing at night.
Components of the system
The main element of the system – heat insulation, the role of which plates of mineral wool or polystyrene. Mineral wool is distinguished by great thermal insulation properties, high durability, fire safety. The lack of it is only one – hygroscopicity. Even at low hydration heat insulation properties of mineral wool can be reduced to 50%.
For facade insulation using mineral wool boards with a density of 120-170 kg/m3, tensile strength upper Sloane less than 15 kPa and with water absorption not higher than 1-1,5%. Experts recommend to use a plate with a minimum thickness of 55 mm.
Polystyrene – an alternative to mineral wool and a wonderful heater. It can be foamed (Styrofoam) and extruded (polystyrene) is mainly applied in the insulation of foundations . The advantage of the first – second – high strength. The cost of extruded polystyrene below the cost of mineral wool.
The main drawback of EPS is the susceptibility to burning, so for insulation of the facade should use products treated with flame retardant, which makes them self-extinguishing. Densities must be at least 25 kg/m3, compressive strength – not less than 0.1 MPa, bending strength – not less than 0,18 MPa.
The next element of "wet" facade – reinforcing layer. This glutinous composition, which utaplivajut fiberglass mesh density of not less than 145 g/m2. To protect the insulation of the first floor, is the most exposed to mechanical loads, it is desirable to use a tubular mesh density of not less than 200 g/m2 or conventional, but in two layers.
For finishing application of mineral plaster, which is painted after application and drying, or polymeric compounds, to which is added the right color. Independently of the type of plaster composition, it is important that it was permeable.
The total procedure works
The basis for the system of "wet insulation" can serve almost any wall: brick, stone, concrete, wood. Before finishing the walls should be carefully cleaned of all dirt and dried pieces of mortar. For mineral surfaces, use a primer for better adhesion of the layers.
The next step – gluing vrazbezhku insulation to external walls and then additional fixation of the disc-dowels. Then, the surface of the plates is reinforced by coating them with adhesive layer thickness of 3-5 mm and embedding it in fiberglass (the edge put a small overlap on each other). To protect the external corners of the building, basement, window and door openings use specially designed for these purposes, reinforcing profiles.
The role of the decorative layer performs exterior stucco. Often used for this "bark" is a mineral composition with a solid small filler. It gives the façade a view of the same moth pest of wood, which, surprisingly, is quite well perceived by our vision.