The main timber treatment operations are carried out during the cold season. Winter forest is the best forest, professionals might say. There are multiple benefits to it. First of all, it is drier and denser, which is an indicator of wood’s high quality.

Winter-felled trees are less prone to decay, the reason is simple: harmful microorganisms and insects are incapable of living when exposed to low temperatures. Another advantage is that during winter, the concentration of resin acids and essential oils is higher, and therefore the antiseptic qualities of such a material are reaching its peak.

During the manufacture of wooden houses, we use timber logs of different diameter from 18 to 80 cm,
which depends on the following factors:

  • climatic indicators;
  • time limitations for lifespan of the house;
  • individual customer preferences;
  • financial aspect of the project;
  • house design solution.


The rounded log is one of the most popular materials for building houses, saunas and other wooden
This is due to its natural aesthetic appearance, eco-friendliness, and comparatively low price.

The company WONDORF has its own rounded log production facilities.
Our modern equipment allows to perform the operations of cylindrical calibration with compensation grooves, as well as to apply an antiseptic treatment.

Production technology

Wood preparation
Wood processing
Final grinding
Log cross-cutting
Kerfs (longitudinal grooves)
Pin-groove junctions
Antiseptic treatment
Log marking
Wood preparation
The wood preparation lies in sorting the timber by its calibration measurements (length, diameter), followed by sending it to the wood drying chambers.
Wood processing
The wood processing starts with the separation of the bark and sapwood from wood using hard cutters. Since one of the most important quality parameters is an equal size of each log, therefore, we pay much attention to centering works.
Final grinding
Then follows final grinding - prepared logs pass through the cutters, after what the log comes out as a precisely measured polished cylinder. Depending on the purpose of the further log exploitation, it is passed either ones or several times through rounds of different cutters.
Log cross-cutting (bucking)
It is a very important stage of wood processing, essential for finding possible
defects in timber. But the main task is to perform wood processing works according to the parameters
anticipated in the project documentation.
Kerfs (longitudinal grooves)
Kerfs (longitudinal grooves) are made to eliminate the formation of gaps during the construction of the vertical surface, while the compensation groove is getting done to prevent the timber from warping and cracking throughout exploitation.
Pin-groove junctions
Pin-groove junctions, made on the specific woodworking integrated machine, are created for logs assembly in the corners of the house. The size and form of cutouts may vary according to the intended use of the log. Our team carefully controls the quality and eliminates minor flaws. If there is a significant defect found, the log is being put aside until further processing.
Antiseptic treatment
The vital step in woodworking is the process of antiseptic treatment. Disinfectant can be applied manually. The other way is to immerse the log in an antiseptic fluid, in which case, it must be properly dried later on. At the customer’s request, the finished log can be coated with a fire-resistant substance.
Log marking
 In all timber-producing countries exist rules and regulations which require specific markings on the ends of all logs. Marked logs are stacked with due regard to the ventilation and protection from deformation.


Our company uses the newest technology to manufacture profiled VIP timber.
The distinguishing feature of said invention is a reliable way of securing a dry beam in the vertical and horizontal planes of the wall. This can be achieved by carving a wooden lath and fastening it along the beam’s length.

The tight connection between the lath and internal grooves of the beam eliminates the penetration of cold air
through the wall. Although the spline joint is not laid with the insulation material, such a technology prevents heat loss. Thus, in this case, the thermal conductivity will be 0.1 W / m * C, same performance as for glued timber.

Production technology

To ensure the even drying process, over the entire length of the profiled VIP timber, we make additional diamond-shaped grooves. Their main purpose is to fasten beams to form a monolithic wall. Separately we cut out a lath, that is completely solid, seamless, and identical to the length of the beam.

When the wall assembly begins, the lath will be placed between the top and bottom grooves, thus preventing the wood from cracking. To provide even more strength and reliability to the future construction, we cut grooves
using a so-called Scandinavian cut section form.

At any time of the year, the client receives a premade housing kit of perfect quality made from profiled timber with a stable moisture content of 17%.

This is because the production facility is equipped with modern machinery, ideal for the preparation of dry blanks for further manufacture of the profiled timber. Items are produced in winter since winter-felled wood has a moisture content of 35%. Subsequently, in chambers we dry it down to 17%, giving the timber the ability to resist warping and cracking.


Profiled timber - a tetrahedral piece of material made from solid wood.
It has grooves and ridges on its
surface made to ensure a reliable connection. Today, as a building material for housing units, profiled timber is very much in demand. In most cases, it is made from conifer timber.

Production technology

Wood preparation and sorting
Timber plane works
Parallel grooves
Wood preparation and sorting
At this stage, we select defect-free, strong winter-felled trees.
Timber plane works
On the wood processing machine, we plane the log from four sides, thus giving it a
rectangular shape. The beam can be both flat-sided or with the semicircular surface, giving it a distinct similarity with a solid tree.
Parallel grooves
Along the length of the beam, we cut parallel grooves, which type, width, and shape depend on the
further log exploitation purpose. These tongue&groove cuts are located on opposite sides of the beam.
During the assembly, they are being connected with the exact same cuts of top and bottom logs. Timber
profiling significantly increases the monolithic character of the structure, moreover, the walls become air-
and waterproof.
If it is specified in the contract, it is possible to treat the material with an antiseptic and fire retardant.
Our company manufactures profiled and standard timber of normal moisture in various sizes (150mm X150mm, 100mm X 150mm, 135mm X 135mm, 90mm X 135mm, etc.).

These sizes are specified in the wood processing standards, but it is possible to produce timber of other sizes. Moreover, we can provide additional wood drying service.

A house made of profiled timber does not need additional finishing works, its walls are smooth both from the inside and from the outside.


Good exploitation performance, high reliability and durability - these distinctive features of glued timber houses have made them one of the most popular types of real estate today.

Glued timber houses are very popular not only in countries with a cold climate such as Norway, Finland, Germany, and
Scandinavian countries but also in North American countries.

In these regions, the house construction using timber is continuing to gather momentum. In comparison
with considered to be traditional brick and concrete, timber house building has already surpassed in its

Another significant practical advantage of a glued timber house is the absence of wood-rotting processes.
All the materials for glued timber houses are produced explicitly using modern German equipment. The
entire process of manufacturing materials is fully automated, thus, the client will eventually receive a
house that meets the highest European standards.

Production technology

Glued timber, unlike other materials, is an innovative product. Therefore, its production requires strict compliance with established wood processing technologies.
Reception and sorting of raw materials
Wood drying
Wood defect screening
Splicing lamellas
Lamellas chisel work
Splicing lamellas into a timber
Profiling or planing glued timber
Production of wooden parts
Technical inspection
Reception and sorting of raw materials
At this stage, the lumber reception department checks if raw materials meet the standards of production.
High-quality wood is being stacked and subsequently sets off to the next production stage.
Wood drying
At this production stage, piles of lumber of natural moisture content enter the chambers to dry off to a moisture content about 12%. For wood drying, we use convective drying chambers, with a load capacity of 100 m3 each. The wood drying process is completely automated, is carried out by the prior set program under the strict guidance of our technologists. Each drying cycle takes 7-8 days, depending on the season.
Wood defect screening
The dried plank arrives at the workshop. First of all, it is transported to a 4-sided woodworking machine for the flaws detection process. At this stage, takes place the initial wood planing, which reveals the visual defects present on the board. The planed board is stacked, then sets off to the next operation.
At this stage, the cross-cutting machine operator cuts out all unacceptable defects from the planed board. This stage of production requires great accuracy, it is important not to miss any imperfection, but at the same time not to overdo the panel. Thereafter, defect-free boards are sent to the next production stage.
Splicing lamellas
On a defect-free piece of the panel, we apply a non-toxic adhesive with durability class D4. Then panels are placed under a special splicing press, where individual pieces become a solid glued lamella. After gluing and pressing, the lamellas are sent to set.
Lamellas chisel work
Spliced lamellas are sent to a 4-sided woodworking machine, designed specifically to perform a chisel work. Here, glued lamellas undergo a process of final chiseling and planing, before splicing it into glued timber, the final product.
Splicing lamellas into a timber
After going through a 4-sided woodworking machine, planed lamellas are sent to the adhesive applying machine. After that, the lamellas with glue applied to them go under the wood splicing press. The pressing cycle takes 30 minutes. At the end of these procedures, we get glued timber, ready for further processing into various products.
Profiling or planing glued timber
After the glued timber production workshop finished timber is sent to manufacture other various products. Depending on the purpose of the further product exploitation, glued bar undergoes extra planning or profiling process. If further on it is planned from said bar to produce glued beam, then it is planed to a square shape.
Production of wooden parts (cutting woodworking joints and pre-drilling holes for steel dovels)
At this stage, profiled or planed glued beams are being sent to an automatic joint-cutting machine. The joint-cutting equipment sets up for cutting out the details for your future house specifically. At the end of this cycle, each individual product is marked with a tag corresponding to the particular detail number in the construction project.

At the moment our production facilities are fitted with the most modern equipment and allow us to produce even the most intricate elements for your future glued timber house.
You get a precision details for walls, floors, beams, trusses, rafter system, frame elements, produced in the factory with the most reliable and high-quality machinery.
Technical inspection
Every glued timber product must be sent to the Quality Control Department, where before packing it is visually inspected and checked for their safety, quality, compliance and fit for purpose.
Nature gives us an organic resource, and we use technology to improve its properties and extend its
service life. The timber we produce is several times more durable than a solid tree. We know for sure that
you will be satisfied with its quality.

Quality guarantee

We provide warranty for each project
During the construction of wooden houses starting with logging and to the final assembly of the house, we carefully monitor quality control. At the stage of concluding a contract with a client, we guarantee a general 5-year warranty for the finished house, this amount of time is specified in legislation.

By entrusting your wooden house construction to our care you get:

Guaranteed wood quality
Honest cost estimate;
Perfectly fitted logs, processed joints, grooves, and edges;
Individual approach to each client
Well-designed standard or individual house plans;
Durable and reliable house in a unique modern style.
Wondorf designs and manufactures wooden houses only from eco-friendly materials.

We use the best processing technologies and the latest innovations to implement even the most intricate architectural projects.

Main priority for Wondorf company

Client satisfaction is the main priority for Wondorf company, therefore we responsibly fulfil all contractual obligations and very carefully respect standards, rules, and traditions of wooden housing construction.

Our guarantees are not empty words, but a confirmed assurance of high quality at all stages of