Chopped walls
What are chopped walls? These are log walls laid longitudinally on top of each other, connected at the corners by cups. A groove is selected along the logs; it can be either lunar or W-shaped. Lunar groove is mainly used on diameters 28-34cm, W-shaped from 34cm and above. The average width of the groove is 12-15 cm; making the groove wider is not recommended, since after shrinkage the wide groove opens and gaps inevitably appear. The lunar groove inside must have an under-interior for installing insulation. The use of natural insulation materials such as flax or jute is not recommended; they are not elastic, do not restore their original shape, and are susceptible to rotting and moth breeding. The only natural inter-crown insulation material that can be used today is sheep wool.

The corner connection of the frame "cup" must be made in compliance with the internal gaps for shrinkage and insulation. Internal gaps and their execution directly affect how well the log house will sit correctly in a year or two. This is very important, the initial tight fit of the logs is not an indicator of the quality of the cutting; you need to look at the execution of the hidden surfaces of the grooves and cups. The Russian cup cannot structurally provide for a change in the diameter of the wood as it dries.

The Norwegian and Canadian cups are the same in their operating principle, in the shape of a cone. Their slight difference in design, such as with a tenon (fat tail) without a tenon, with an upper edging, or both upper and lower, has a greater impact on the style of the log house or bathhouse and, with a certain visual preference, does not in any way affect the operation of the cup itself. It is worth noting that with a good experience of the carpenter, the time for making any cup is the same and should not affect the cost of making a log house.

The most correct thing is to build a log house from dry wood. If this can be solved with houses made of gun carriages using a drying chamber, then for houses made of round logs only by atmospheric drying, i.e. debarking and stacking the required amount of wood for 2 years. We don’t know anyone who decides to do this. At best, winter procurement and spring or summer construction.

Much has already been written about Canadian and Norwegian logging and we see no point in repeating it. We have a little-known technology, developed with German partners for 20 years, it is applicable to large diameters on average for 36-40 cm and it scares many Russian clients, but in vain. We posted it on forumhouse and on some social networks. There was no understanding, especially among adherents of the Russian cup. Those who cut Canadian are interested and ask the right questions. What scares everyone about this technology is that the log house is initially built with gaps between the logs from 4mm to 12mm, depending on the number of the crown.