Installing an iron door may feel challenging at first because iron doors are heavier and more detailed than standard wood or fiberglass doors. However, with the right preparation, accurate measurements, and proper handling, the installation process can be much easier to understand.
At Glory Iron Doors, most of our iron doors are shipped as a pre-hung door system, which usually includes the door frame, threshold, door slabs, glass panels, weatherstrip, door sweep, and hardware prep. This guide will walk you through the basic installation process and help you know what to prepare before your door arrives.
Before You Start: Important Things to Know
Before installation, please make sure the rough opening, floor level, wall condition, and jamb size have been checked carefully.
Iron doors are heavy, so we recommend having at least 2–4 people or professional installers available during installation, depending on the door size and configuration. For larger double doors, doors with sidelights, or doors with transoms, additional help or lifting equipment may be needed.
Please note: we do not provide installation screws or mounting bolts, because every customer’s wall condition is different. The correct fasteners should be selected by your installer based on your wall material, such as wood framing, concrete, brick, block, or steel structure.
What Is Usually Included in the Package?
Our Glory Iron Doors are carefully packed in a wooden crate with a protective steel frame and heavy-duty wrapping to help protect the door during transportation.
A typical package may include:
- Door frame with threshold
- Door slabs
- Operable glass panels, if applicable
- Entry door handle set with keys
- Door sweep
- Weatherstrip
- Roller catch or related hardware
- Flush bolts for inactive double door panels, if applicable
For doors with sidelights or transoms, these sections may be packed separately and connected during installation.
Tools and Materials You May Need
Your installer may need the following tools and materials:
- Measuring tape
- Level
- Carpenter’s square
- Pencil
- Drill
- Screwdriver
- Hammer
- Pry bar
- Utility knife
- Shims
- Caulking/sealant
- Appropriate mounting screws or bolts
- Safety gloves
- Lifting assistance or equipment for larger doors
For simplicity, we will assume you have a double door and the installation for a single door is basically the same.
Step 1: Check the Rough Opening
Before placing the door frame into the opening, confirm that the rough opening is wide enough, tall enough, level, and square.
For most pre-hung iron doors, the rough opening should be slightly larger than the door unit size. A common recommendation is to allow enough space for adjustment and leveling.
Check:
· Opening width
· Opening height
· Floor level
· Wall depth
· Whether the opening is square
· Whether there is enough clearance for the swing direction
Step 2--Install the Door Frame / Jamb First
The jamb should be installed first without the door slabs, as it is lighter and easier to position to maneuver in place. There are usually 4 lugs (and sometimes 6) welded to the jamb. These will be bolted into the framing from the inside of the house using the 3 1/2” x 1/2” lag bolts. Important-Initially, Only Fasten the left and right top most lugs to the framing. This is necessary to allow for some adjustment of the jamb later.
Step 2---Hanging The Doors
Remove the glass windows from the door by unfastening the latches and pulling them open so they can be lifted off from their hinge pins. If your glass of your doors is fixed like french doors and pivot doors, then ignore this.
Make sure the hinge bearings are installed. The hinge bearing is a thick brass washer that is must be in place on each hinge pin. The two heavy hinges should receive a VERY light application of oil or grease on both sides before the doors are hung. Do not get grease on the painted surfaces, as this may damage the finish.
Step 3--Hung The Door Slabs to The Jamb
Lift each door onto its hinge pins. After the doors are hung, use the flush bolts on the edge of the inactive door to hold it closed.
Step 4--Adjustment to The Door Fit
Even though you have checked the plumb of your framing, there may be some small adjustment needed to ensure your doors are installed correctly.
With the doors closed and looking from inside, check that the two doors line up together in the center (look at the tops and bottoms of the two doors). If they do not, then the jamb is slightly out of square. You must move the bottom of the jamb to the left or right until the doors line up exactly. See the picture below to understand a door jamb out of square.
In the picture above, the bottom of the door jamb must be moved to the left slightly. The door tops and bottoms will line up perfectly in the center when the jamb is square.
Next check that your doors close evenly from top to bottom. If, when you close your door, the top or the bottom touches the astragal first then the jamb is slightly twisted. You can adjust this by moving the appropriate lug inwards (towards the inside of the house) or outwards (towards the outside of the house) until the doors close evenly top and bottom at the same time.Once everything is adjusted correctly then secure the lower lugs in place with the lag bolts. Check the fit of the doors once again to make sure nothing moved while you were tightening the bolts.
Step 5--Install The Window and Lockset
The window hinges also have ball bearings, the windows are simply lifted into place and latched closed. Install the lock mechanism and pull handles on the Doors.
- Check the dimensions of the pre-drilled deadbolt hole.
- Insert the deadbolt latch into the edge hole of the iron door.
- Secure the deadbolt latch into the door with screws.
- Screw the interior and exterior of the deadbolt mechanism to the door.
- Insert the door handle latch on the inside edge of the door
- Secure the door handle latch into the door with screws.
- Place the iron handles on the pre-drilled holes and secure them with screws
- Close the iron door and test the deadbolt and handles.
Step 6: Seal Around the Door
After the door is fully adjusted, apply appropriate exterior-grade sealant around the frame as needed.
Proper sealing helps reduce water intrusion, air leakage, and drafts. Pay extra attention to the bottom threshold, side jambs, and connection points between the main frame, sidelights, and transom.
Your installer should choose the correct sealant based on your exterior wall material and local weather conditions.
Installing Sidelights and Transoms
If your door comes with sidelights, the sidelights are usually connected to the main door frame before the full unit is secured to the rough opening.
Apply sealant between the sidelight and the door jamb before joining them together. Then fasten the connected unit into the opening.
If your door includes a transom, the main door frame is usually installed first, and the transom is installed above it. Seal the connection area between the transom and the door frame before fastening.
For large or tall units, such as double doors with sidelights and transom, professional installation is strongly recommended.
Common Installation Mistakes to Avoid
Avoid these common issues during installation:
- Not checking the rough opening before installation
- Fully tightening the frame before hanging the door panels
- Installing the frame out of level or out of square
- Using the wrong screws or anchors for the wall material
- Forgetting to seal the frame properly
- Forcing the lock before the door alignment is corrected
- Installing a heavy iron door without enough manpower
A properly installed iron door should feel stable, swing smoothly, close evenly, and lock without pressure.
Do You Need a Professional Installer?
For smaller single doors, some experienced contractors may be able to complete the installation smoothly. However, because iron doors are heavy and require accurate alignment, we usually recommend hiring a professional installer.
Professional installation is especially recommended for:
- Double iron doors
- Doors with sidelights
- Doors with transoms
- Oversized doors
- Pivot iron doors
- Thermal break iron doors
- Projects with masonry, brick, concrete, or unusual wall conditions
A professional installer can help ensure the door is level, secure, properly sealed, and ready for long-term use.
Final Thoughts
Installing an iron door is not necessarily difficult, but it does require careful preparation, proper tools, and accurate adjustment. The most important steps are confirming the rough opening, installing the frame correctly, checking alignment before final fastening, and sealing the unit properly.
If you are planning to order a custom iron door, our team can help confirm your door size, jamb size, swing direction, glass option, and configuration before production.
Contact Glory Iron Doors to start your custom iron door project today.
