The surface of the door frame kit, flexinvest, casings are often greater than surface of the leaf itself. And, as we already explained, it is surface finishing products, and affects most significantly the cost. The cost of quality components for the door frame can significantly exceed the cost of the door leaf. This is especially true of panel paintings. Their surface is smooth and therefore easier to be manufactured and is finished with. A surface elements of the door frame – curly. Cost processing, which is several times higher than the plane. Quality items of door frame (which includes the entire set: the box, and trim, and flexinvest and thresholds) in the more highly dependent on the technological capabilities of the manufacturer.
Set of equipment for finishing curved surfaces at times more expensive than a set of equipment for the manufacture of door panels. That is why, in many places that sell the door, you'll gladly show the door leaf, fenced in any guides. Components of the door frame offered as though by default. If by "default" acquire such a set, you can often find that the door leaf and finished with veneer or artificial veneer. A box – shaped block of pine painted with paint or colored lacquer, very remotely appropriate surface of the door. Will this set flexinvest and trim with the appropriate level finish – also need to examine carefully. But one thing is for sure. The company, which with equally high quality makes all the components of the door, show a truncated set will not.