Many write that you should use timber of K24. But what is the difference? I went to K-Rauta and saw that they had both K24 and unspecified floor joists. But K24 was significantly more expensive.
Does Byggmax have such timber, does anyone know? I am going to buy timber for floor joists, walls, and rafters. Which of these must be K24 in that case???
Best regards, Freij