For the production of MINTAL wood-aluminum and wooden windows, we use carefully selected structural timber that meets the strictest requirements for strength, stability, and dimensional consistency. For us, wood is not just a design element, but a fundamental structural material that significantly influences the functionality, airtightness, and lifespan of the entire window.

The core of the structure is a multi-layered glued beam, which ensures uniform quality, precision, and stability along the entire profile length. Thanks to finger-jointing and a layered structure, internal stresses in the material are eliminated, and the beam retains its mechanical properties long-term. For maximum dimensional stability, we use radially cut timber, where the growth rings are oriented parallel and longitudinally. This processing method significantly reduces the risk of twisting, cracking, and deformation, even with large dimensions and long-term loads.

We use soft and medium-hard wood species with an optimal bulk density of approximately 350 to 480 kg/m³, which provide an ideal balance of strength, stability, and thermal insulation properties. Most commonly, these are spruce, larch, and light reddish heartwood Meranti. After drying, Meranti achieves a density of approximately 385 to 480 kg/m³ and excels with a combination of lightness, strength, and durability, making it exceptionally suitable for the production of energy-efficient windows. Conversely, hardwood species with higher density, such as oak, are not suitable for this purpose, as their higher thermal conductivity would worsen the insulating properties of the window.

We use premium class A500+ timber, which meets the highest standards of strength and stability, as well as the requirements of STN 74 61-01-2 and STN EN 942 standards. The wood is free of defects and dark fibers, ensuring a clean, uniform surface suitable even for architecturally demanding projects. We also ensure precise control of wood moisture in the range of 12% ± 3%, thereby minimizing the risk of dimensional changes and ensuring the long-term stability of finished windows.

The result is structural timber that maintains its shape, parameters, and aesthetics long-term, creating a strong foundation for windows that perform reliably even after years of daily use.