1 Decide how far you’d like to place the mouldings from the outer edges of your door, then measure and mark accordingly – ours are 100mm from the edge all round. Attach the decorative corners first using wood glue. Once that is done, measure the distance between the decorative corners to determine the measurements of your mouldings.
2 Mark where you must saw the mouldings and use a mitre box and hand saw to cut each piece to size with neat 45° angles so they will fit nicely between the decorative corners.
3 Paint wood glue over the back of the individual pieces and press into place on your door. Apply firm pressure while making sure that each piece is lined up neatly with the edges of your door. Leave to dry.
4 Use wood filler to fill in any gaps. Leave to dry before sanding lightly for a smooth finish, then paint in the colour of your choice.
Tip If necessary, hold the pieces in place with masking tape until the wood glue has dried completely.