``Cold House III'' where the first floor has been demolished I think I've explained it enough so far, but if you are seriously trying to shift your future house building from new construction to performance improvement renovation... Carpenter's... Training is an urgent need. And it's not a carpenter who is good at pre-cutting and assembling panels, but someone who understands old work. Things will not go well unless there is someone who can use their brains freely to make repairs on-site. No matter how carefully old buildings were assembled, over time they have become more distorted than today's pre-cut structures. Therefore, it is difficult to process the beams and pillars that are scheduled to be replaced by pre-cutting to reduce work on site. It is impossible to do this without bringing unprocessed materials to the site, or hand-processing them at the site based on the patterns and baka sticks copied at the site. The parts are made with a little extra margin and then assembled on site by sawing and chiseling them together...you get the point, right? A carpenter who can use a handsaw and a chisel...those skills can only be learned through regular hand carving. In other words, what the new renovation society needs most are carpenters who can do old-fashioned work. When he was an apprentice, he learned how to carve by hand, then to pre-cutting, two-by-two, and panels...in short, he is a carpenter who has followed the evolution of wooden houses up until now. In the first place, I don't know what kind of structure the house will be renovated. It might be Yosawa's original panel, or it might be Sugeta House's 206, or it might be a native one that everyone is lucky enough to know. That's why pre-cutting is evil, and two-by-two is just children's building blocks... I'm honestly in trouble for the carpenter who keeps complaining about it. Lol... If I have time to criticize the customer's work, I'll think hard about how I can fix it. Also, it's important to educate and change the mindset of designers...I have experienced this myself...In school, they only learn plans and drawings for new construction. The number of new buildings in the world has been decreasing for a long time, but the opposite is true for education. The same goes for materials...I want hardware and tools that can be used for repair and retrofitting. Lastly, there are technical standards and the people who review them. In particular, building officials who inspect renovations at counters will no longer be able to conduct proper inspections unless they are required to undergo on-site training. I think these are difficult times.