A door frame is the fixed surround that holds a door in place and lets it open and close properly. It is easy to overlook, but it is doing a lot: carrying the weight of the door, keeping the weather out, and giving you the seal that stops draughts. Here is what a door frame is made of, part by part, in plain terms.
What a door frame actually is
The frame is everything around the door that does not move. The door itself is the leaf that swings; the frame is the structure fixed into the wall opening that the leaf hangs from. Whether it is a front door, a back door or an internal door, the same basic parts are at work, though external frames are built tougher to handle the weather.
Knowing the names helps when you are talking to a fitter, ordering a replacement, or trying to describe where a draught is coming from.
The main parts of a door frame
The head
The head is the horizontal piece across the top of the frame. It ties the two sides together and takes some of the load from the wall above. If a door starts catching at the top, the head is often where the trouble shows.
The jambs
The jambs are the two vertical sides of the frame. One is the hinge jamb, where the door is hung, and the other is the strike jamb, where the latch and lock catch. These take most of the day-to-day wear, since every open and close pulls on them.
The sill or threshold
At the bottom of an external frame you have the sill, or threshold. This is the part you step over. On modern doors it usually includes a weather seal and a slight upstand to keep rain out, and low-threshold versions are available where step-free access matters. Internal doors often have no sill at all.
The door stop
The stop is the thin strip that runs around the inside of the frame. It is what the door closes against, stopping it swinging straight through. It also gives the weather seal something to press against on external doors.
The weather seal
On external frames a rubber or brush seal sits in the frame so the closed door presses against it. This is what keeps draughts and rain out. When a door gets draughty, a worn seal is one of the first things worth checking.
The architrave
The architrave is the decorative trim around the frame on the inside, covering the join between the frame and the wall. It is more about looks than function, but a tidy architrave finishes the job off.
External versus internal door frames
External and internal frames share the same anatomy but are built for different demands.
- External frames need weather seals, a proper threshold and stronger fixings, because they hold heavier doors and face the Yorkshire weather. Security matters here too, since the frame is part of what a lock bites into.
- Internal frames are lighter, usually have no sill, and focus on a clean fit and quiet close.
If you are replacing a front or back door, the frame usually gets renewed with it, since the two are matched as a set. Our composite front doors and uPVC doors come as complete units, frame and all, fitted to seal properly from day one.
What door frames are made from
The material shapes how the frame looks and lasts:
- Timber. Traditional, common in period York homes, and can be repaired and repainted. It does need upkeep to stay right.
- uPVC. Low maintenance and a good insulator, widely used on modern external doors.
- Aluminium. Slim, strong and long lasting, popular on contemporary doors and larger glazed openings.
- Composite. A layered build designed for strength and weather resistance, common on front doors.
When a door frame needs attention
A frame does not last forever. Signs it needs looking at include a door that sticks or drops, gaps letting in draughts, soft or rotten timber, or a lock that no longer lines up with the strike plate. Sometimes the fix is simple, like adjusting hinges or replacing a seal. Other times, if the frame has rotted or twisted, it needs renewing.
If your door is otherwise fine and it is the frame or a seal at fault, a repair may be all you need. We handle exactly this kind of job, so it is worth asking about door repairs in York before assuming the whole thing has to go.
FAQs
What are the main parts of a door frame?
The head across the top, the two jambs down the sides, the sill or threshold at the bottom, the door stop the leaf closes against, and, on external doors, a weather seal. Inside, the architrave trims the edge.
What is the difference between a door frame and a door lining?
A door lining is the internal version of a frame, usually a simpler timber surround for internal doors with no weather sill. A door frame more often refers to the sturdier external surround built to take a heavier door and a weather seal.
Can you replace a door frame without replacing the door?
Sometimes, if the door itself is sound and the sizes match. More often, external doors and frames are supplied and fitted as a matched set, so replacing both gives a better seal. A quick assessment will tell you which makes sense.
Why is my door frame letting in a draught?
Usually a worn weather seal, a gap where the frame has moved, or a door that no longer closes flush against the stop. Many of these are straightforward to fix without a whole new door.
How much does a new door frame cost?
It varies with material, size and whether it is internal or external, so there is no single figure. Prices change too, so the reliable answer is to have it looked at and get a quote for your particular door.
Want to see the full range of door styles and finishes? Download our latest brochure, or request a free quote and we will come and take a look.