Summary: Learn how to prepare and fix architrave.
The wooden moulding that surrounds a door is called an architrave and consists of two vertical lengths and one horizontal length.
If you want to fit or replace an architrave, first remove the old one with a hammer and chisel, prising it away from the wall. When buying new architrave ensure it is of the same thickness as the old one otherwise you may find you need to insert shims or plane the skirting boards so that the architrave and skirting fit flush together.
Position the architrave against the margin on the left-hand side of the door and accurately mark the right-angle of the margin.
Hold the horizontal length of architrave in place against the margin.
Mark the position of the right mitre cut.
Drill a pilot hole and knock a 25mm lost head wire nail through to the horizontal architrave.
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