In this how-to video from Porta, Ed explains how to install an architrave on a door or window frame using two different methods.
An architrave is decorative moulding used to cover the gap between the lining board and the door or window frame. When installing an architrave, there are two options for joining, a mitre joint or an architrave block.
We’ll be demonstrating both methods, using a block for a door frame and mitre joints for a window frame.
To join timber using an architrave block, measure the distance from the floor to the edge of the door frame, then add 3mm so that the architrave isn’t sitting exactly flush with the frame (this is called the quirk).
Cut the timber for one side at a 90 degree angle, attach a block at the top, then secure the architrave with nails.
Secure the block at the top of the first side, secure the top flush with the block, then secure the other side.
To install an architrave using mitre joints, measure the internal width of the window frame, then add 2 x the width of the frame and 2 x the quirk to get the full length of the piece.
Once all the pieces are cut and sanded, start by installing the base, lining up the architrave with the quirk line and securing it with nails. Apply a small amount of wood glue along the edge of the mitre, then attach one side. Continue around the window with the top next, and finally the other wise.
Once the architrave is installed, if the faces of two pieces aren’t flush, push one piece until they are flush and drive a nail through the edge to secure them together.