The low thermal conductivity of laminated veneer lumber is

Wood has always been considered a good building material. Thanks to modern technologies, currently, as an alternative to rounded logs, profiled glued laminated timber has been widely used by developers.

The demand for this building material is primarily due to the fact that the thermal conductivity of laminated veneer lumber, as well as its other characteristics, are far superior in parameters to a number of other building materials.

Features of laminated wood

Glued laminated timber is individual lamellas (boards) of coniferous trees, which are packaged and glued together in a special way by pressing them along the plane.

Advantages of glued lumber

The prospect of using laminated wood material for construction is due primarily to the improved properties of laminated laminated construction, in particular the low thermal conductivity of the beam.

Due to the removal of all defects in production, an improved product is obtained, which has several advantages compared with solid wood:

• increased requirements for the stability of the geometric shape of products;
• possessing the properties of solid wood;
• with a relatively small weight provides good carrying capacity;
• high strength characteristics;
• elimination of through cracking and distortions during operation;
• the ability to manufacture products of very large sizes and any shape;
• lack of seasonal swelling and summer drying of wood;
• increased fire resistance;
• low coefficient of thermal conductivity of glued laminated timber;
• high strength;
• less susceptibility to mold and rot.

The disadvantages of multilayer glued products

The disadvantages of glued lumber can be attributed to the possibility of its separation, but only when using non-high-quality glue or violation of the drying technology. The price of laminated wood is also higher in comparison with the cost of solid products.

The main characteristic of glued products

The thermal conductivity of a wooden beam is one of its important characteristics. It characterizes the ability of a wooden product to receive heat from objects that have a higher temperature or to transfer heat to less heated bodies. The lower the value of thermal conductivity, the better the lumber retains heat.

Compared to other building materials, the thermal conductivity of a wooden bar has one of the lowest values ​​- 0.10 W / m2.

Such a low value of thermal conductivity is achieved due to the presence in the design:

• wood, as the basis of glued timber;
• glue, which is a good heat insulator.

Profiled timber has a lower density (about 500 kg / m?) Compared with other materials for construction and, accordingly, has less weight. Therefore, its thermal conductivity coefficient has a lower value.

Glued laminated timber with a thermal conductivity coefficient of less than that of building materials such as brick and concrete allows its use for the construction of comfortable and cozy houses.

The thermal conductivity of a 150x150 bar is approximately the same as logs having a diameter of 240 mm. Due to this property, the walls can be made much smaller thickness than from other materials.

The production process of multilayer wood products

At the first stage, sawing up of the workpiece on boards (lamella) is performed. Then, the obtained lamellae are dried in a special chamber, in which the humidity level is strictly controlled, usually from 8% to 12%.

After drying, the boards are carefully folded and sorted by strength. At the next stage, marking and closing of the rejected areas is carried out. Under the marriage get knots, irregularities of the edges and cracks.

The ends of the slats are milled with a toothed profile and glued to the desired length under a press. To glue the lamellae together, a thin layer of glue is applied along the plane. After applying a layer of glue boards are assembled in the form of a package, which is a blank of the required cross-section, and are pressed.

At the last stage, the finished glued product is profiled.

Independent construction

Modern glued timber is great for the construction of small private houses (cottages).

The following instruction focuses on the main stages of building a comfortable and cozy home with your own hands under the guidance of an experienced master.

1. Building a house of laminated wood, like any other building, begins from the preparation of project documentation. At this stage, special attention should be paid to the correct choice of cross-section of wall material, depending on the length of the spans. To save financial resources, you can use the standard design of a wooden frame;

Tip! When developing the design documentation, it is advisable to make a plan for scrapping and transfer it to the manufacturer of the timber. All necessary cuts will be made on the production. Factory layout allows you to perfectly fit all the elements of a log house or cottage.

1. In the next step, the foundation is established. Since the wooden frame has a small weight, you can use a pile or shallow-tape foundation for the house of timber;
2. Next, you need to make a reliable waterproofing bottom trim from the foundation. For this, it is enough to lay roofing material on the entire basement area, or you can use bitumen mastic;
3. A fixed crown is installed on the finished waterproofing, and floor beams are installed;

Tip! It is advisable to impregnate the lower beams of the log house with an additional special protective measure against mold, rot and fungus.

1. The very first crowns must be connected to the foundation using wooden studs;
2. On the first row of the beam fit the required layer of insulation. Then mounted the second and subsequent rows of bars. Thanks to factory dismantling the process of wall construction is greatly simplified. At this stage, it is very important to control the accuracy of horizontal and vertical levels;

1. After the walls are erected and the floor beams are laid, the truss system is equipped with the timber;
2. At the last stage, the roof is laid and its insulation is carried out.

Glued lumber has a high-quality surface and practically does not require any additional finishing.

Conclusion

Thus, glued profiled timber due to its low thermal conductivity, are ideal building materials for the construction of comfortable housing. In the presented video in this article you will find additional information on this topic.