Wood processing

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"SENEZH" are the leading means of protecting wood from biodamage, fire protection, as well as for decorative finishing and restoration.

Recognized standard of wood protection


Wood protection SENEZH

Like many other materials, wood has its own specific characteristics that must be considered when using it. Despite having a number of positive properties that determine its widespread use in construction, wood also has a number of disadvantages, including combustibility and the ability to rot. Therefore, there is a need for special impregnations applications for wood.

Danger for wood

First of all, wood is a living natural material that can absorb moisture. Even a slight change in the relative humidity of the air leads to a change in the moisture content of the wood. In turn, changes in wood moisture lead to swelling, drying out, cracking, decay and other undesirable results. In general, moisture can become dangerous for wood in structures and buildings. But the main enemies of wood are microorganisms: mold, wood-staining and wood-destroying fungi, insects, algae. Mushroom spores that are floating in the air, get into moist and nutritious wood. It takes just a few hours for the spores of wood-staining or mold fungi to germinate in the wood. The first signs of damage are not difficult to notice: dark spots, “blue stains”, grayish coating, “mold”, moisture overload. Fire is another danger that awaits the owners of a wooden house.

Wood protection: medicine for wooden structures

During the construction of wooden objects, specialists use various methods to increase the durability of wood at all stages of the technological process: when harvesting and choosing timber, determining a place for construction, choosing architectural, planning and structural solutions. It is important to provide a set of measures that can eliminate the possibility of wood moisture, because it is wet wood that is a breeding ground for many types of fungi and insects. Humidity contributes not only to the development of biodamages, but also leads to an increase in the ability of wood to deform and a decrease in its strength. Wood protection is provided by water-soluble protective agents, formulations based on volatile organic compounds, oil antiseptics, antiseptic pastes, etc. Aqueous solutions of antiseptic and fire-bioprotective agents are most widely represented on the market today. Moreover, the production and consumption of water-based antiseptics tends to constantly increase. The most important reason for the shift in the global range of wood preservatives towards an increase in water-based preparations is the constant tightening of environmental legislation that limits the content of toxic components in antiseptic formulations. What formulations? In what order? At what stage of construction should we use wood preservatives? Those who were involved in the construction of wooden houses, baths or outbuildings, asked themselves the above questions. Let’s view the features of use of protective equipment at various stages of the construction of a wooden house.


Wood protection at the preparatory stage

Protection against mold and blue staining:

The preparatory stage can be a period that includes timber harvesting, transportation and storage at the facility. Usually, wood is stored outdoors and by the time construction begins, it is often affected by wood-staining and mold fungi. This problem is especially relevant in cases where there are strict requirements that are imposed on the appearance of wood, for example, in the case of building a wooden house from logs. It is not difficult to imagine what kind of disappointment will await an almost accomplished homeowner if the once flawless rounded log loses its appearance, being affected by mold and wood-staining mushrooms. It is important here to preserve the appearance of wood for quite a long time from the moment of harvesting to the moment of the house completion. Usually, protective agents for timber that are available on the market are able to protect wood for a fairly short period of time, no more than 2-4 months. At the same time, a new generation of products have long been developed and successfully used. Due to the balanced formulation of their components, these formulations do not change the color of the wood and are able to protect lumber for a much longer. These products include, for example, the hardly washable antiseptic "SENEGE EUROTRANS", which does not change the color of wood and is designed to protect it for a period of 4-8 months. But even wood treated with such a formulation will require compliance with elementary storage conditions. Lumber must be stacked on spacers, and it is necessary to exclude contact of the material with the ground.

Wood bleaching:

If the wood is already affected by wood-staining fungi, but the process has not gone too deep, the painted wood can still be bleached. There are various formulations that are used to bleach wood. Some remove lesions, some mask them. Chlorine-containing bleaches “burn out” the wood, destroying its structure, due to their chemical formulation, while simultaneously removing all resinous and tannins from the wood. This is the most common remedy. Another class of bleaches is formed by the so-called gentle bleaches based on active oxygen. Products of this type do not destroy the structure of wood, and therefore do not degrade its characteristics. The wood gains a pronounced light shade. No toxic gases are released while working, but, on the other hand, dealing with such bleaches is somewhat more difficult. There are not that many products yet of that nature, but one of them is SENEG NEO, produced by Senezh-Preparaty. To prevent the lesion from recurring, the wood should be treated with an antiseptic after bleaching.

Protection of wood ends from cracking and decay:

It is necessary to think of the problem of protecting the ends of timber from decay and shrinkage cracking. Many people have paid attention to the cracked ends of wooden log buildings - the view is rather unaesthetic. Cracking of the ends occurs due to the different rate of evaporation of moisture through the side and end surfaces. To prevent cracking and wood decay, it is necessary to treat the ends of the logs with products that have special formulations even at the stage of harvesting lumber. Such formulations reduce the intensity of moisture evaporation through the end parts of the wood and prevent moistening of the ends leading to decay. Unfortunately, today it is difficult to find a specialized tool ready for use, designed exclusively to protect the ends of timber from cracking and decay, and yet such tools exist. One of these formulations is, for example, "SENEZH TOR" - an environmentally friendly product without solvents and scent. This product helps to reduce the number and depth of shrinkage cracks, it reduces the linear deformation of timber during drying, protects the ends of the timber from moisture and, unlike paraffin, does not require heating.

Wood protection in critical structures

First stage

The initial stage of construction includes the laying of lower rims, logs, draft floors, elements of basement structures, etc. Here the wood is exploited under conditions of active and prolonged exposure to atmospheric and soil moisture and other factors of active moisture and biodegradation. Such elements form the basis of a wooden structure and require long-term protection for a fairly long period. To protect the most critical wooden structures exploited in such conditions, water-soluble products that are not washed out or hardly washed out are used all over the world. These products include water-based antiseptics "SENEZH" and "SENEZH BIO". These formulations are characterized by the processes of "fixation" in wood, as a result of which the components of the protective agent form new chemical compounds that are resistant to leaching and have characteristic antiseptic properties. Formulations change the color of wood, giving it a greenish tint, and effectively protect against house mushrooms - the most dangerous wood destroyers that can turn wood into dust in a few months.

Protection of walls and partitions

Special requirements are always imposed on the appearance of a wooden structure, therefore, it is better to use antiseptic impregnations "SENEZH ECOBIO" or "SENEZH OGNEBIO" for its protective treatment that do not change the color of wood. Usually, colorless antiseptics belong to the class of washable ones and are used for deep antiseptic treatment of structures that are exploited in conditions that exclude direct and prolonged exposure to moisture indoors and outdoors (under a shed). For outdoor work, those materials are used as a bioprotective primer before the next layer of paint.

Fire-protection treatment. Rafter system protection

Interfloor ceilings and truss systems are considered as a complex design solution. Due to the existing risk of fire, these elements require mandatory treatment with fire protection products that have a special formulation. It is better if these formulations combine both fire retardant and bioprotective functions. Fire retardants can be divided into fire retardant coatings and impregnating formulations. In the first case, these are paints, varnishes, pastes and coatings. In the second - impregnations. Coatings change the appearance of wood, so they are used for invisible structures. Impregnations are more widely used as they retain the decorative properties of wood. Only formulations of the 1st and 2nd groups of fire retardant efficiency according to NPB 251 (GOST 16363) are classified as fire retardants. Fire retardant impregnations of the 1st (highest) group are used to protect the structures that are at the most risk of fire. Due to the fact that such structures are usually subjected to rather harsh requirements in terms of fire safety, it is convenient to use formulations that provide control toning of wood. For example, the formulation of the complex fire-retardant and bio-protective action "SENEG OGNEBIO PROF" gives the wood a pink tint. The use of such formulation makes it possible to visually control the quality of fire retardant work. Fire-retardant impregnations that do not change the color of wood are used to protect wood from fire, located in the interior of the room. "SENEZH OGNEBIO" is one of those kind of products. If necessary, colorless impregnations can be tinted immediately before use. It is important to remember that any fire retardants are subjected to mandatory certification, and in addition to the fire safety certificate, they must also have sanitary and epidemiological conclusions. For example, an indisputable guarantor of the compliance of the fire retardant formulation with the established fire safety requirements is a certificate issued by the «POZHTEST» authority of the Federal State Institution VNIIPO EMERCOM of Russia.


Decorative trim inside and out

Decorative finishing of wooden houses

When a wooden house is already built, it will require decorative finishing. Environmentally friendly protective and decorative water-based antiseptic coatings are widely used for wood finishing outside and inside the premises. Unlike organic solvent-based products, water-based coatings do not have an unpleasant scent. In such products, acrylates are used as a binder. All this allows the coating to stay on the facade of a wooden structure for a long time. Decorative coatings from various manufacturers are distinguished by a variety of color shades, but not all of them are able to maintain their original appearance without fading in the sun. Glazing decorative coatings with a UV filter have proven themselves well. They are able to absorb solar ultraviolet radiation, preventing fading (darkening) of wood under a protective layer. The texture of the wood is not hidden after the application of such coatings. Not all water-based or solvent-based decorative coatings presented on the market have antiseptic properties and are able to protect wood from molds and wood-staining fungi. In the case of using such products, it makes sense to pre-treat the wood surface with antiseptic impregnations.