Which panel in the picture?

[ViktorD]

Hello,

Does anyone know what this type of panel is called? I'm planning to build a small guesthouse in this style but I'm not quite sure what to search for. Additionally, does anyone have any good information to add about this type of panel? Advantages, disadvantages?

 

[SBH]

plain flat panel. possibly of tongue and groove panel

 

[ViktorD]

Great, thanks!

// Viktor