The use of wood for construction has been known since prehistoric times and today it is widely used for construction of houses. However, most tree threaten enemies, both external and internal. The former should be attributed, primarily, the fire (wood is known to be highly flammable) and ultraviolet rays, which detracts from the appearance of structures of this material. Inside the danger comes from moisture. It contains not only a growing tree, but in lumber or finished wood products. Moisture content of wood should not exceed 15%. Excessive saturation of water and insufficient ventilation gradually destroy the structure of the material and cause other diseases of the tree. In addition, if it is under the open sky, the amount of its internal moisture is not constant. The tree then absorbs water in direct contact with rain or moist air, it dries out. These oscillations lead to warping and premature aging of the wood. However, the worst enemies of wood - are microorganisms (bacteria, fungi, mold, moss) and insects and mercilessly feeding on wooden structures. From enemies to fight: either in advance to prevent their attack or defend against invasion, if it is, alas, has already happened. Protect the tree from the enemies to help special chemicals - antiseptics. They are of two kinds. First - impregnation (primer), which have antimicrobial and anti-fungal (fungicide and algitsidnym) effect. Primers usually colorless or with a greenish tinge, which disappears after a few months after application. As a solvent used in the impregnation of aqueous and organic compounds. Latest expensive, but penetrate deeper into the wooden structure (high-quality primer - up to 10 mm). The greater the depth of penetration, the more effective and longer will be protected by wood and the stronger the fixed top (finish) coating. It is the second kind of antiseptic. Topcoat, also based on water or organic solvents, is a film that should be primarily elastic. Wood expands and contracts, and with varying intensity along and across the grain. If the film is not sufficiently elastic, then after the high-cycle progress, it will burst. In cases where the product is in contact with our climate, the water gets a crack, which zamerznuv will cause flaking and fracture coatings. Antiseptic impregnation, penetrating deep into the wood, protect him from bioporazheniya. But most of them do not have the film, and therefore a barrier to external moisture. Coatings, by contrast, always water repellant. In addition, their film does not interfere with the tree to "breathe" - release outside vaporized moisture that accumulates inside the structure. Typically, the films contain special substances, most commonly metal oxides, which filters ultraviolet radiation. The state of the tree the sun's rays are not particularly affected, but the appearance of spoil. Raw material from the white-yellow during the year may turn to gray, and then to colorless. The film is transparent, translucent or colored. Transparent and translucent texture of the wood to emphasize the beauty of cut or fancy tie of fibers. At the same time using antiseptics can hide the texture or change the color of the tree. Tinting capabilities of opaque coatings are large: from imitation pattern and color of the surface of pine, oak, teak, rosewood or walnut to almost any color of the rainbow. If ultraviolet rays are reflected finishing of decorative and protective layer, then to fight fires require special treatment. The most effective - one that acts as a fire extinguisher. From contact with open flame, it swells and forms a foam layer about 1 cm foam - a great thermal insulator, it does not admit the heat to a tree, rather than letting it burn. Antiseptics can be applied to any tree, depending on the breed of brand antiseptic no. Another thing is that soft wood absorbs it more than solid, that is, increased consumption of material. In addition, the softwood trees such as spruce or pine, a lot of knots, surrounded by the resin pockets. Latest release tar stains, which destroy the protective coating. Therefore, for the treatment of knots and pockets before applying them to film an antiseptic, special primer. Most impregnations and coatings can be divided into compounds for interior (living room furniture) and exterior (facades, fences, garden buildings). But in any case, reputable firms strictly adhere to environmental requirements and do not admit to antiseptic vapors that are harmful to human health. In recent years, manufacturers increasingly offer combined means. It is antiseptic impregnation and antiseptic coating, in one vehicle combined both functions. There are also the substance of universal actions that protect against all adversity, whether it's a bug or mold. From domestic wood destroyers can not always be timely and reliable safeguard. Sometimes in to serve you faithfully for a barn, the cellar or on the oak posts you notice dark spots or grayish-bluish plaque, swept surface of the wood. This biological parasites - mold and blue. Reasons for their occurrence is difficult to establish. Spores can enter the material by accident, for example, with the wind. But more often they appear in cases where the wooden structure located in areas with humid and stale air. Thus, the pile of logs, fully wrapped with polyethylene from the rain waiting for their applications - ideal for the growth of microorganisms. May rot and wood plinth, which systematically gets water from the roof. But do not despair as there is a whole generation of agents that are saving already diseased wood. Deep blue - a signal that the tree must be protected. Blueness does not change the mechanical properties of wood, but is a precursor to decay. Thoroughly dry the structure, ventilate it, cover the treatment - and re-examination will only need 4 or 8 years (depending on when the warranty expires antiseptic). More serious disease - wet rot, damage to wood fungi, mold or bacteria. It not only spoils the appearance, but also destroys the fiber, softening the wood. You click on a board with your finger, and it fails. In this case, you must remove the damaged area, cutting out all the rot to a solid wood handle the remainder of the old wood and make the insertion of a new, and then cover all the antiseptic quality. The worst damage wooden structures causes white house fungus (dry rot). It affects not only the tree, but even the brickwork, and chetyrehsantimetrovy oak floor, he can destroy a month. In this case, without heavy-handed intervention is necessary. Only after you have completely cut out all bionarost have done a thorough fungicidal wash, and close up gaps and cracks are non-shrinking putty, set the insertion of a healthy tree and caused topcoat, can be considered anti-rot completed. Insects, unlike microorganisms appear regardless of operating conditions and humidity. Here is a list of key pests: beetles teredo (furniture or houses), barbel, rodents and drevogryz. And dangerous not only bugs, but their larvae. Detect voracious insect is easy: they leave behind small holes - moves in the timber. It is easy and will destroy the pests: it is necessary to process each hole a special antiseptic solution and then cover the surface protects the new layer. Struggling with the enemies of the tree, do not forget: the most effective protection - prevention of destruction of timber. Experts believe that this is possible only when a systems approach: on the prepared surface treatment is applied, then the substrate, which provides good adhesion of primer and topcoat, and finally, the very finish. Upon expiration of the protective layer of antiseptics should be updated. The only way you can permanently save the wooden structure.
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