A tongue and groove joint is a unique woodwork joint that is attached edge to edge with two or more pieces of timber. It is made with one edge consisting of a slot that runs down the entire length of the timber and a tongue which fits into the slot.
This groove and tongue feature creates a reasonably strong and aesthetically pleasing joint that can be used in areas such as floorboards, lining boards, wood panelling and table tops.
The tongue with a grove feature is easy to attach together because of its simplicity and it allows for a tight fit that has plenty of surface area for adhesives.
These joints can be very difficult to make without the right woodwork machinery. You are more likely to buy timber with this joint already in it, such as lining boards than you are to make it yourself.
Because of the many types of timbers readily available with this particular type of joint it is probably best to buy what you need than to try and make the joint because it is much simpler than attempting to make the joint which requires great tools, machinery and skill.
Also you don’t often require much timber with this joint because it is used as more of a feature in most furniture so there usually isn’t a lot of it used