Question \ Answer

KLESTER System — systematic approach to construction


Face

Yes, winterization system materials can be freely used to finish any face with firm mineral foundation, such as brickwork, foam-gas-concrete work, concrete, traditional plaster. To improve cracking resistance one has to fasten sections, reinforcing elements, create reinforcing layer, additionally even it with plaster, ground, then cover it with texture decoration plaster.
To finish the face, you may follow the directions for finishing of foam polystyrene tiles in facade winterization systems. Do not use wall dowels. Further works should be performed according to wet method of facade finishing. one should fasten sections, reinforcing elements, create reinforcing layer, additionally even it with plaster, ground, then cover it with texture decoration plaster or, in case of internal surfaces - interior decor (dalle, wallpapers, paint etc.).
Leave-in-place form is made of expanded polystyrene, from which facade winterization system is developed. So you can freely use winterization system materials for reinforcing and alignment of foam polystyrene surfaces. It this case one has to create a basic reinforcing layer of adhesive solution and alkaliproof facade fiberglass mesh according to facades winterization system reinforcing rules. To even the reinforcing layer one can use any plasters and sub-soil, designed for preparing surface for wallpapering (or painting).
The fact is that in real conditions, workers don't wait for all layers to hydrate and dry. There is also high air humidity during autumn and winter period. Thus heat-insulating, glue reinforcing and finishing layers contain excess moisture, even they seem to be dry. If one covers acrylic paint or plaster, than in consequence of low steam throughput of acrylic materials, moisture, contained in foundations is conserved. Likewise moisture, which enters both sides of coating foundation additionally saturates the foundation. Consequently when it is freezing outside and especially on a clear and sunny day, the wall is heated and partial pressure difference of vapor reaches maximum: moisture begins intensive migration of the winterization system into the atmosphere. At that the acrylic layer doesn't keep up with moisture transport and scales off the foundation.
Frost resistance is a relative working lifespan without visible deterioration and vast material performance degradation.
Working standard with integrated materials test practice is developed to evaluate and compare materials working lifespan. The higher material frost resistance, the longer is serves in real weather conditions. Relatively it is the number of cycles, which the material can withstand in climate chamber without deterioration. During tests the material is saturated with water, frozen, than unfrozen, irradiated by UV and IR bulbs, thus simulating material service life. Material condition indicates its frost resistance, which is given in cycles number. Many people say that 1 cycle = 1 year. It is wrong. 1 cycle - is service life durability unit.
Yes, it is allowed to assemble winterization systems during winter. At that, set scaffoldings are wrapped in a special facade (preferably heat sealed) foil, inside one should set round-the-clock heating to maintain temperature above +10oC. One can plaster the facade with mineral plaster and shift acrylic, silicate and silicone works to a warm season to prevent accidental freezing during transportation and emergency situations, connected with heating shutdown. It is strongly not recommended to use acrylic plaster and paints during winter period.
It is fault of workers, performing works. There are a few reasons for exceeded consumption rate - poor walls equation, too much material on the ground, use of the wrong working instrument, violation of recommended covering and structure forming technological procedure.
One can cover the face with practically any facade paints after thorough drying of glue reinforcing and finishing coat. If you use mineral plaster, it is recommended to cover it with silicone or silicate vapor-permeable paint. In other cases one can use acrylic facade paint. It is not recommended to cover freshly finished faces and mineral-based systems during autumn and winter period.
Winterization systems are developed in a complex, which uses texture thin layer plaster. Such winterization systems passed tests and are certificated. To simply paint the reinforcing layer, one needs to thicken the reinforcing layer on certificated plaster width against fire-protection goals, carefully prepare the surface for facade plaster painting, apply the ground color and paint. In this case is is difficult to get perfectly even surface, since there are small inequalities on the wall, which spoil the general view upon sidelight. Plaster texture visually conceals such inequalities.
Manufacturing company recommends tone (shade) ground color, used under the decoration plaster, if ambrosia beetle texture is used. It is done so that white sub-soil does not appear when forming striation plaster texture. Such tint coating is needed only when using tinted plaster. If wing nut texture is used or plaster layer is painted with facade paint regardless of texture, ground color tint coating is not obligatory.
One should obligatory use ground color under the plaster, since it improves plaster's adhesion to glue reinforcing layer, limits its saturating capacity, prevents decorative plaster water from fast soaking into the base material, (usually) contains small glass sand, which creates a little gritness on coated surface, helping evenly rub out decoration plaster texture. Special ground color for silicate and silicone plasters are also chemical diaphragms between chemically different glue reinforcing and finishing layers, which aids better material adhesion.
Face net, made of wicker glass fiber with 5x5 mm meshes, factory impregnated with antialkaline coating, is used for reinforcing and strengthening the adhesive layer on heat-insulating tiles surface. The net increases mechanical durability of glue reinforcing layer, which protects heat-insulating tiles from excitation inputs and is the basis for the decorative layer. The net must withstand alkaline condition of the glue reinforcing layer, main reinforcing net density should be not less than 145 g/m2 (recommended and used 165 g/m2.).
It is recommended to fasten start section 400-600 mm above ground level. Such height doesn't let the abrasive, broken out by rain from ground, asphalt, pavement etc., fall on the main building wall, at that the cap should be a little bit sunk into the wall (closer to foundation) and furnished with abrasive and splashes proof material. Also, such start section height allows effectively cut off capillary water lift and ingress of moisture into the main wall reinforcing layer.
Face winterization system is a complex frontal finishing, which includes insulating the face with heat-insulating tiles, tipping to the foundation with special mixed glue, additional wall dowel fastening, basic glue reinforcing coating and final ornamental finishing coating. By insulation type, winterization systems are divided into mineral basalt wool system and polystyrene foam system. By chemical basis of final decoration plaster, winterization systems are divided into mineral, acrylic, silicate, silicone, silicate-silicone. Variety of system elements and specific physical features of materials, contained in the system, form a single composite material with definite consumptive qualities.
Yes, manufacturing companies try to have all needed certificates, hygienic certificate and State Committee for Construction technical approval for winterization systems. Winterization systems Certificates of Authentication are currently not required, for which exemption and explanatory letters are provided. At present, the laws on certification and GOST are changing: decrees are replaced by decrees, recalled by laws, and after a while new laws and reguations appear. At the moment there is no decisive juridical base for juridical opulence of someone or other production documents specification.
Building walls geometrical pattern should be accepted according to SNiP norms 3.03.01-87 and 3.04.01-87 (partition-walls reinforced concrete vertical deflection - not more than 15 mm, horizontal deflection - not more than 20 mm, 2 m on the section - not more than 5mm; brickwork - vertical not more than 30 mm, horizontal for 10 m length - not more than 15 mm, for 1 m vertical section - not more than 10 mm, etc.). Manufacturing companies calculate heat insulation glueing expenditure rate according to SNiP and material consumption rate tables. In effect walls bending can be greater, therefore adhesive solution consumption rate may be higher. One can calculate exact adhesive solution consumption rate only after measurement of all place walls.
Air gaps, which may appear during tiles tipping, are not allowed. To seal tiles against each other one has to use regular geometrical shape heat-insulating tiles. If tiles have defections, one has to polish edges against each other. Large air gaps are cold bridges, where glue may flow during reinforcing, which subsequently condenses humidity and can damage reinforcing layer. If there are gaps, they need to be filled with assembly foam accordingly to heat insulation depth. Single gaps not larger than 1 mm are allowed.