Often, especially when we are framing objects, a standard moulding is not deep enough to accommodate all the items to be framed. We therefore need to build an extension to the back, called a box or shadow box frame. This box can be made of raw wood then coloured or our preferred method is to use another finished moulding which is screwed and sealed to the front frame. The box frame is usually hidden behind the main frame or it can be used as a decorative feature on the side. ​