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How prefabricated log home kits are produced?

What should you know before starting construction?
Why is a glued log house less prone to fire? How does it conduct heat? Is it really easy to build it?

One of the popular materials in the single-family construction market is the laminated beam. Houses made of them are considered high quality, durable and fireproof. Let's learn about the main advantages and disadvantages of laminated timber houses.

What is glued laminated timber?

Glued laminated timber is a timber material made by gluing together flawless boards, joined longitudinally to form a beam. The international abbreviation is Glulam (glued laminated timber).

The main feature of glued construction is the predictability of its properties. Solid wood is not monolithic in terms of technical qualities and has a heterogeneous structure with knots, cracks and other defects. With glued materials, most of these defects are minimized or eliminated.

Houses made of glued beams do not shrink significantly, do not crack or warp, retain heat better, are not afraid of moisture, fire and decay.

Manufacturing glulam logs is a multi-step, quite expensive, labor-intensive and technologically advanced process.

Profiled laminated timber beams

Receiving and preparation of raw materials

We only source raw materials from verified suppliers, meticulously inspecting each delivered batch. Our technical control service specialists conduct manual acceptance of lumber, performing visual inspection and instrumental quality control of each board. They then carry out preliminary antiseptic treatment to prevent wood fungal infection (blue stain) during storage before drying. The boards are laid out on supports and placed in drying packages for further drying.
production of prefab glulam log home kits, boards cut and stacked before drying

Drying boards in drying chambers

The board is placed in Italian convection drying chambers, where high-quality wood drying is carried out in a gentle drying mode according to European standards, allowing to relieve internal fiber tension of lumber.

The entire drying process is automated, so moisture, temperature, and air circulation control is carried out with high precision. It is a long and expensive process, but this approach allows drying the board to the required moisture content of 12(+/-2)% according to technological requirements.

After drying, the dry board is moved to a warm warehouse (20ºC) - this is a mandatory requirement in glued timber production: the board entering the workshop for further processing must have a temperature not lower than the workshop temperature.
production of prefab glulam log home kits, boards stacked and drying in kiln drying chamber

Cutting and Sorting

Before lumber is sent for defect detection, it undergoes thorough control for moisture content, curvature, and the presence of metal. Lumber that does not meet moisture requirements is sent back for further drying, while curved lumber is cut into straight pieces. To detect defects, the board undergoes planing on a four-sided machine.

At this stage, markers conduct special inspections to detect defects and wood flaws unacceptable in glued timber production. The marker manually marks detected defects with fluorescent chalk on a special table, for subsequent transfer of the board to an automatic product optimization line. The equipment automatically cuts out all sections with defects along the marking line. Then, the blanks for the lamellas are transferred to the joining line.
production of prefab glulam log home kits, dry boards sorted and being cut to get rid of wood defects

Lamellas - core of future beam

On the automatic joining line, following the optimization line, there are two finger jointers installed. They cut the ends of the blanks on both sides, creating the "mini-finger" fastening connection according to existing requirements. Eco-friendly glue is applied to it, and the blanks are joined into lamellas, which are cut to the required length on the integrated end-cutting unit.

Final calibration of lamellas

The final planing and calibration of the produced lamella is performed on a special 4-sided planing machine at speeds up to 100 m/min. The planer ensures high quality of the planed surface. The quality of planing is crucial for the strength of the glue joint, so it is necessary to smooth the surface of the lamella. After the final planing, the lamellas are fed for gluing.

Glue Application

The lamellas are fed into the new generation robotic glue application station, which is fully automated and does not require manual adjustment of the glue feed. To be more precise, any such human intervention is completely ruled out here. The application of glue is particularly important in terms of technology, as the quantity and composition depend on parameters measured automatically. The station is equipped with sensors for humidity levels (both material and room air), temperature, speed, and pressure of the glue. The program calculates the optimal portion per 1 m².

For bonding, we use environmentally friendly glue of Swedish manufacture, ensuring strong connections. After the glue is applied, the lamellas are directed to the package formation zone for hydraulic press compression.


The prepared bundles are placed in the press which ensures pressing of glued timber with a cross-section thickness of up to 500 mm. For quality bonding, the geometry of the press's working area, including the flatness of the guides, must be perfect. After gluing in cold presses, the glued timber is held for the necessary time to gain strength in the glue joint.

Timber Profiling

Automated timber profiling is carried out on four-sided eight-spindle high-precision machines. With high precision and adherence to geometric accuracy, Finnish or German profiles are cut using high-tech milling cutters. These profiles are excellently joined using the "tongue and groove" system, which helps reduce heat loss and ensures the airtightness of the house. The timber undergoes automated geometric size control.

Antiseptic Treatment (Fire Bio-Protection)

Finished house kits are treated with a fire bio-protection compound in accordance. The antiseptic treatment is carried out using a compound without chemical components, which has a European certificate of ecological safety.

Ends are treated with a special protective compound based on acrylic polymer dispersion, which closes pores and prevents moisture penetration.
production of prefab glulam log home kits, close photo of engineered log is covered with fire bio-protection compound

Marking and Quality Control, Packaging, and Storage

Finished parts are labeled with tags so that the builder knows exactly where the part fits in the construction of the house. Such tags indicate the part number, line number, kit number, date of manufacture, and other necessary information and parameters.

The timber is formed into bundles and packaged in polyethylene film. Each bundle comes with a packaging sheet containing specifications. The bundles are then moved to the finished product warehouse, where they are stored until shipment to the buyer.
production of prefab glulam log home kits, quality control of log after being cut by CNC machine

How does the construction of a glulam log home look like?

Construction of a house from laminated wood - a fairly quick and uncomplicated process.
Laminated log house kits are manufactured at the factory. The house is assembled directly on the construction site, where the foundation is pre-poured. The next step - direct assembly of the house, installation of roofing, windows, doors, interior finishing (communication wiring, decorative finishing) and exterior (wood protection and spot sealing).

Laminated timber buildings are erected in various ways. The production period depends on the complexity of the project and the area of the house. For example, a house of up to 120 square meters can be assembled in a month, provided the foundation is already in place. Such houses can be built all year round, since laminated wood is resistant to environmental influences.
Laminated log houses, like wooden houses in general, are considered environmentally friendly. The environmental friendliness of glued-laminated timber is manifested in its ability to evaporate volatile substances useful to human health from the open surface and cyclically exchange air with the atmosphere inside the room, maintaining a healthy microclimate inside. In addition, glulam log houses are earthquake resistant.

They are even used in Japan, including for the reconstruction of areas affected by earthquakes.

The advantages of such construction also include the quick readiness of the house, a minimum of finishing, insulation, minimal maintenance, a simple foundation. Glulam wood requires no additional insulation. It has a tight bonding of interlocking surfaces. The shrinkage of a house made of laminated wood is only 1-2%. This is ensured by using kiln-dried lumber in production.

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