Selecting Door Frame Type for Iron and Aluminum Doors

Why the frame type matters before production

The door frame carries the load of the door, anchors it to the wall and determines how well the door seals against weather and noise. Choosing the frame late often leads to rework, so it is best treated as a planning decision.

For iron and aluminum doors, the frame must match the weight of the leaf, the type of wall (block, concrete or existing stone), and the finish that will be applied. A frame that works well for a light aluminum door may not suit a heavy iron security door.

Measuring the opening on site

Accurate measurement is the foundation of a good frame. Measure width and height at the top, middle and bottom of the opening, since walls are rarely perfectly square or plumb. Record the depth of the wall and the position of the finished floor and threshold.

• Check whether the opening is rough (before plaster) or finished.
• Note any tiles, thresholds or floor build-up that will change the final height.
• Mark the swing direction and the side on which hinges will be fitted.

Choosing the frame system

Frame systems differ in how they are fixed and how they handle the wall. Some are welded steel frames set into the opening before the wall is finished, while others are adjustable frames installed after the masonry is complete. Your choice should follow the construction sequence on your project.

Consider the door material as well. Iron doors usually need a sturdier frame and stronger anchors, while aluminum doors can use lighter sections. Discuss the options with the factory so the frame is designed for the actual load and use.

Drawing and written specification

After measurement, the factory prepares a drawing showing the frame profile, dimensions, door swing, anchor positions and finish. A written specification lists the materials, the protective finish such as hot-dip galvanizing or powder coating, and the installation notes.

Review the drawing carefully before approval. Confirm the opening sizes, the threshold height and the side of the hinges. Once the client approves in writing, production can begin, and changes after that point are costly.

Production and finishing in the factory

Frames and doors are manufactured to measure in the workshop, which allows precise cutting, welding and assembly before the parts reach the site. Steel elements may be hot-dip galvanized for corrosion protection, and then powder coated in the colour chosen by the client.

Working in the factory means the door and frame can be tested together, checking that the leaf closes evenly against the frame and that hardware fits correctly before delivery.

Installation and final checks

On site, the frame is set plumb and level, fixed to the wall with the specified anchors, and the gap around it is filled and sealed. The door is then hung and adjusted so it opens smoothly and closes with an even margin on all sides.

• Verify the frame is plumb and square before fixing.
• Fill the gap with appropriate material and protect the finish during plastering.
• Test the lock, closer and seals before handover.

Frequently asked questions

Do I need the same frame type for iron and aluminum doors?

Not always. Iron doors are heavier and usually need a sturdier frame and stronger anchors, while aluminum doors can often use lighter sections. The final choice depends on the door weight and the wall type.

When should the frame be chosen during a project?

Ideally during the planning stage, before masonry work begins. This allows the frame to be set correctly and avoids costly changes to the opening.

What information should I give the factory when requesting a quote?

Send photos of the opening, the wall type, the approximate dimensions and the swing direction. Mention the door material and any finish you prefer, so the factory can prepare an accurate drawing.

Is on-site measurement necessary?

Yes, in most cases. Walls are rarely perfectly straight or square, and on-site measurement ensures the frame fits the real opening rather than the drawing.

Common mistakes to avoid

Choosing the frame after the walls are finished or relying on rough measurements taken from plans. Both often lead to gaps, misalignment and rework.

Our recommendation

Share the wall type, floor finish and construction sequence early, and request a written drawing before approval. Having the frame and door designed together reduces surprises on site.

Summary

Select the frame type during planning, based on measurement, door weight and wall type, and confirm everything in a written drawing before production.

Related guides

• Designing Security Door Panels: Infill and Pattern Options
• Planning Door Hardware Positions During the Design Stage
• Planning Glazing Openings in Aluminum Doors
• How to Choose Door Swing Direction and Handing
• How We Review Your Door Drawings Before Production Begins
• What Information to Prepare Before Requesting a Door Quote
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