The door frame is comprises of three parts – Two vertical parts and one horizontal part. The vertical parts are classified "Jamb" and the horizontal part, which sits on vertical parts, is designated "Head". For your knowing, PVC and some different sorts of entryway come as a bundle. That implies door jamb and entryway screen are joined. You don't have to introduce them independently. Be that as it may, for wooden entryway, it ordinarily comes independently.