Starting house refacing, it is necessary to pay special attention to elimination of roughnesses of wall. Similar finishing requires the quality hard putty intended for performance of external works. It is possible to cover with such structures both wood, and other construction surfaces.
Putty for external works: general information
Putty for external works represents the finishing material suitable for elimination of roughnesses of relief. It is applied for the purpose of preliminary alignment; over putty impose other finishing materials. Distinctive feature of spackling structures – special resistance to temperature drops and mechanical deformations, good coupling with the most various surfaces. Entering into compositions of special bactericidal additives allows to prevent harmful effects on putty of biological factors.
Draft (starting) putty is used for seal of especially serious defects of surfaces. Filler for this putty includes large fractions of working substance. The put even with thick layer, such material is not exposed to cracking and very quickly dries. Differs in high coupling with different types of surfaces.
Honing (finishing) putty intends for thorough alignment of insignificant roughnesses. Coupling with surface at it not the most effective therefore finishing putty is selected under in advance put draft layer. After full drying the layer of honing putty usually is exposed to grinding.
Cement structures
Putty at the heart of which there is cement binding goes on sale in the form of dry mixes. Just before application they are dissolved in water, mixing to the required consistence then apply on outer surfaces. The main destination of such putty – elimination of roughnesses, considerable by the size.
As filler in these mixes serves marble dust or carefully purified sand. The plasticity to structure is given by additives: unslaked ground lime and various softeners. At their lack of mix after completion of finishing in layer of material cracks can be formed. It is recommended to store cement hard putty far from moisture.
Polymeric structures
Such putty has appearance of both dry mixes, and ready solutions. Taking into account type of binding substance distinguish acrylic, latex, acrylate and alkyd polymeric putties. The first two views are most popular. Structures of this kind with success apply to finishing of wooden, concrete, cement and other surfaces. Are quite widely used during the external works polymeric structures from raised thermo - and moisture resistance. Their assignment – fine finish.
Acrylic putty is easily applied on wall and does not peel off even at long operation in adverse conditions. Acrylic is resistant to moisture, has elasticity and high strength. The lack of acrylic putty is that with its help it will not turn out to eliminate serious defects for once. Grinding of the dried surface when using acrylic putty is carried out in respirator. Structures on the basis of acrylic apply both to alignment of outer surfaces of walls, and to their dressing.
Latex putty comes to retail chain stores in the form of paste. Well is suitable for external works as has unique waterproof properties. It is durable, it is easily applied on surface of walls.
Silicate putty
Mineral kind of front putties. The basis of finishing material of this type is formed by liquid glass. The structure has high vapor permeability, perfectly protects surfaces from moisture and influence of dust. Most often silicate putty is applied to finishing of walls from foam mortar. It is possible to refer her tendency to cracking to shortcomings. The high density of structure and considerable specific weight of mix are capable to lead to formation of non-uniform layer of material therefore at negligent drawing the pieces of putty after drying can fall off wall.
Silicone putty
Rather expensive material having excellent resistance to external influences. The most valuable quality of such putty is its ability to self-clean from dust and other pollution. Differs from the majority of other types of putties in abundance of color shades.
Plaster putty
Universal structure. It suits for processing of surfaces of any type in various conditions. Properties of mixes are defined by availability and amount of polymeric additives. Additive in the form of latex allows plaster putty to resist to moisture influence. Introduction to mix of polystyrene provides resistance of putty to low temperatures. The fact that such putty practically does not shrink is considered valuable quality of material of this type, and therefore after drying does not crack. Taking into account rather low cost, plaster putty becomes the most attractive option among the other mixes intended for repair of facade.
Recommendations about the choice of putty for external works
When choosing putty for external works it is necessary to remember that its durability and other utilization properties depend on prescription features. Regardless of putty of a specific type at it there are mineral fillers, plaster or cement, the softeners modifying additives. Plastic properties of the prepared solution, force of its coupling with construction surface, resistance to the destroying influences of the environment directly depend on look and the number of the last. As a part of front putty there can be substances with the expressed glue properties: soap, drying oil, varnishes, chalk.
Finishing putty which is applied on closing stage of works on finishing of facade can be frost-resistant and waterproof. The water-repellent effect protects walls from emergence on them of condensate most of which often arises at hit on surface of rain or evaporations. Advantages of waterproof putty: speed and simplicity of drawing, reliable protection of concrete surfaces, possibility of very uniform imposing of layers, good compatibility with any kinds of plaster. Frost-resistant putty is not afraid of low temperatures, it has well proved in the conditions of northern regions. There is direct opposite of such material differing in resistance to the increased temperature.