How Is a Steel Door Installed? The Process, Step by Step
Share
A good door with a bad installation becomes an average door. However strong the body, a door whose frame doesn't grip the wall properly gives way under forcing not at the lock but at the frame-wall junction. In this article we walk through how installation proceeds and what gets checked at each step.
Three measurements — all three are essential.
Before installation: the site survey
Installation quality is really decided at the site survey. What gets checked on site:
The opening's three measurements — width, height, wall thickness
Whether the opening is level and plumb (it rarely is perfectly square)
The wall type — reinforced concrete, brick, aerated concrete; the fixing type follows from it
Floor, elevator and access route — can the leaf be carried in?
Electrical wiring — do any cables run along the frame line?
We detailed how measurements are taken in the measuring guide.
1. Removing the old door
The leaf comes off its hinges, then the frame is cut out. Some wall damage is unavoidable at this stage; the edges of the opening are cleaned up and trued. Since the entrance stays open during removal, the timing is planned in advance in apartment buildings.
2. Placing the frame
The frame goes into the opening and is set level and plumb. This is the most critical moment of the whole installation: seat the frame a few millimeters off-true and the leaf starts swinging open or shut on its own, while the gasket pinches on one side and gaps on the other.
In our method, the inner and outer frame are one piece and grip the wall from both sides with the clamp technique. The frame is seated on the wall, clamped tight, and its alignment rechecked.
3. Bolting
The frame is fixed to the wall with metric 8 bolts. The number and distribution of fixing points matter; the load must not concentrate in one zone. The fixings on the lock side are especially critical — that's where forcing aims first.
4. Filling the frame-wall gap
A gap of roughly 1 cm is left between frame and wall and filled with polyurethane. That gap is deliberate: it absorbs the small movements that come with a building settling, and it breaks the heat/sound bridge at the same time. Skip the gap or the fill, and both problems come back.
5. Hanging the leaf and adjusting
The leaf is seated on its hinges (on pivot models, its bearings). Then:
Is the leaf-frame gap even all the way around?
The alignment is fine-tuned with the adjustable-pin hinges
Do the lock bolts enter their keepers without strain?
Does the gasket make full contact around the perimeter?
Left half-open, the door must not drift on its own
6. The handover check
At the end of installation, we recommend trying the door together: open and close it a few times, turn the lock, take delivery of the keys. Any misadjustment caught at this stage is corrected on the spot — better than a callback later.
Who should install it?
When the team that built the door also installs it, there's a single point of responsibility if anything goes wrong. Our installation is done by our own crew and included in the price — production, installation and service live under one roof.
Installation takes a few hours, and the entrance stays open throughout. In apartment buildings, letting the neighbors and the management know in advance smooths things along. Clearing the area in front of the door, covering anything the removal dust might reach, and providing access to a power outlet is all it takes.
For winter installations, the heating may need switching off — the building will cool down during removal. That's not an obstacle to installing; it's a planning item.
Frequently Asked Questions
How long does installation take?
A standard flat entrance door takes a few hours. Building entrance doors and oversized villa doors can take longer; how stubborn the old door is to remove, and the wall's condition, both affect the time.
Will the wall get damaged?
Some wall damage is unavoidable when the old frame comes out; the edges of the opening are cleaned up and trued. Plaster and paint repair is generally a separate job and gets discussed at the site survey.
Will the door need adjusting after installation?
Small movements can occur in the first months as the building settles; if so, the alignment is corrected via the adjustable-pin hinges. If the door starts dragging or the lock strains, report it without waiting.
Do you do the installation yourselves?
Yes — our own installation crew handles it, and it's included in the price. Since production, installation and service belong to the same company, there's one point of responsibility when an issue arises.
Do I need to be home during installation?
Yes. The entrance stays open, and the handover check needs doing together — so someone must be home. Opening and closing, the lock's operation and the gasket's contact should all be tried while the crew is still there.
Why leave a gap between frame and wall?
That roughly 1 cm gap is deliberate: it absorbs the small movements of a settling building, and filled with polyurethane, it breaks the heat/sound bridge. Leave no gap at all and the frame gets stressed whenever the structure moves.
What if the door drags after installation?
Don't wait — report it. Service corrects the alignment via the adjustable-pin hinges. Dragging doesn't fix itself; left alone, it wears the cladding and throws off the lock alignment.
Is the installation under warranty?
Yes. Since installation is done by our own crew, any installation-related issue is on us, directly. Corrections tied to installation — alignment drift, gasket contact, lock adjustment — are handled under service; and our warranty on manufacturing and workmanship defects has no time limit.
Erdi Yavuz — Founder of Bayrakdoor Steel Doors. Over 20 years of steel door manufacturing experience. Production takes place at our own factory in Gaziosmanpaşa, Istanbul; measurement, manufacturing and installation belong to the same team.
You can ask about your own door, your measurements or your specific area. Our production team reads these and answers here. If you'd like a faster reply, you can message us on WhatsApp.
Rainwater getting in under the door isn't a gasket problem — more often than not it's a threshold and drainage problem. What does the right threshold setup look like?
