The mechanism of formation of cracks and damage wood when working with wood professionals are often faced with the problem of cracking and swelling, and darkening of the ends of wooden buildings. Cracking exposed wood as hardwood and softwood. And the very ends usushechnoe cracking occurs due to different rates of evaporation of moisture through the side and end surfaces. It is difficult to imagine, but through the ends Wood gives moisture to 10 times faster than through the lateral surface. At the same time when wet wood end absorbs moisture and is 10 times faster. Thus, the end of the crack are a consequence of high hydraulic conductivity wood along the grain, and the process of decay begins with the end zones and high on a log.
But we must not forget that wood is exposed to harmful factors at the time of logging. Unprotected wood becomes an easy prey to all kinds of pests such as beetle-grinder and house-fungus, and the presence of moisture in it makes the situation worse by accelerating the processes of destruction. High humidity not only promotes the development of , but also leads ability of wood to deformation and reduction of its strength and grade. On defense, need not only timber and timber. Danger lurks and is already finished houses. Among the elements of a wooden house, the ends of which require treatment with protective agents include: windows, doors, roof eaves, the ends of log and timber, all other end surface facing the outside.