Aluminum Door Sizing for a Mamad Safe Room Entrance

Why sizing starts with the wall, not the door

A mamad entrance is built into a structural wall that was planned for a specific opening. Before anything else, the installer needs the exact rough opening: the clear width and height between finished surfaces, and the thickness of the wall where the frame will sit. Measuring only the existing door leaf often leads to errors, because the old door may have been undersized or installed with a different frame.

Measure at three heights and three widths, and note any out-of-square corners. These readings guide the frame dimensions and whether the door can be built to standard sizing or needs a custom leaf.

Clear opening and door leaf dimensions

The door leaf is always slightly smaller than the clear opening so it can move freely inside the frame. The gap allowance depends on the frame system and the finishing method, so the leaf is cut to a specification made after measurement rather than a fixed rule of thumb.

• Record the clear width and height at top, middle and bottom.
• Note the wall thickness where the frame will sit.
• Check floor finish height, since thresholds and tiles change the usable height.

Share these numbers with the factory along with photos so the drawing reflects the real site.

Frame depth, wall thickness and anchoring

The frame must match the wall thickness so the door closes flush and the lock engages correctly. A frame that is too shallow leaves gaps, while one that is too deep can interfere with plaster and finishing. Anchoring points must be planned into the structure, and the fixing method should suit the concrete or block wall.

Ask the installer whether the frame will be set before or after plastering. The answer affects the depth allowance and the final appearance of the joint.

Swing direction and clearance inside the room

Mamad doors typically open in a direction that allows quick access while not blocking furniture or other openings. Plan the swing before ordering, and check that the leaf clears any fixed items inside the room. Hinges and the lock side should be positioned to support smooth operation over many years of use.

Consider whether the door will need to open fully against a wall, and confirm the handle height works for the household, including children and older residents.

What to confirm with the engineer

Mamad requirements involve structural and safety rules, including protective performance and the fixing of the door set. Exact values for these must be confirmed with the project engineer and the applicable regulations; this page does not state numeric standards. Ask the engineer to approve the door set, frame anchoring and any reinforcement in writing before production begins.

Keep the approval with your project file, as building committees and inspectors may ask for it.

From measurement to installation

A typical path starts with an inquiry and photos, followed by an on-site measurement and a written drawing and specification. After you approve the drawing, the door is produced in the factory and finished, then installed on site. Checking each step against the engineer's notes keeps the project on schedule and avoids rework after the wall is closed.

Ask for the specification in writing so you can compare it to the engineer's requirements line by line.

Frequently asked questions

Can I order a standard size for a mamad door?

Standard sizes rarely fit a mamad opening exactly. Measure the actual opening and have the door made to those dimensions, then confirm it with the engineer.

Who decides the mamad door requirements?

The project engineer and the applicable regulations set the requirements. Your manufacturer should build to the approved specification, not guess the values.

Should I measure before or after plastering?

Measure the finished opening if possible, or confirm the plaster thickness with your contractor. Small differences affect the frame fit.

How long before installation should I start the order?

Start as soon as the wall opening is ready and the engineer has approved the drawing, so production and finishing do not hold up the work.

Common mistakes to avoid

Ordering from the old door size or a rough estimate, and skipping the engineer's written approval of the door set. Both lead to frames that do not fit or doors that fail inspection.

Our recommendation

Measure the clear opening at three points, get the engineer's approval on the door set in writing, and confirm the swing and frame depth before production starts.

Summary

Size a mamad aluminum door from the real opening and wall thickness, then confirm all requirements with the engineer before ordering.

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