Tongue and groove is a type of cladding whereby wooden panels are designed in order to be slotted together in a seamless manner. On each board, there’s a tongue (a thin extended lip) and a groove (a thin cut-out in the wood). The panels are joined together by slipping the tongue of one board into the groove of the next. This makes our BillyOh tongue and groove sheds easy to assemble with just you and a friend. For more information on tongue and groove cladding, check out this guide.