What to Check on an Aluminum Door Before Signing the Contract

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Before signing, confirm the exact dimensions, frame and profile specification, glazing or panel details, finish and installation scope in a written document. Check that the drawing matches what you approved on site, and that the work steps and client approval points are clearly stated.

Confirm the Measurements and Opening Details

Accurate measurements are the foundation of a good door. The quote should state the finished width and height, and it should be based on an on-site measurement rather than an estimate from photos alone.

Check that the measurements match the opening, not just the door leaf.
Ask whether the frame size and any wall thickness allowances are included.
Confirm which side the door opens and the direction of swing.

If any dimension is unclear, ask for it to be verified before you sign.

Review the Materials and Profile Specification

A written specification should describe the materials used for the frame and leaf, including the aluminum or iron profile type and the thickness of the sections. Vague wording such as "standard profile" leaves room for misunderstanding.

Look for details on the locks, hinges and handles, and confirm whether stainless steel or other hardware is included. Ask how the door will be secured and reinforced, especially for larger or heavier leaves.

Check the Drawing and Written Specification

A proper drawing shows the door layout, the opening direction, panel divisions and any glass or infill areas. Compare it carefully with what you discussed and approved during the site visit.

Make sure the drawing shows the correct number of panels and their positions.
Check that glazing, mesh or solid infill matches your choice.
Confirm that every change you requested is reflected in the drawing.

Understand the Finishing Options

Finishing affects how the door looks and how well it resists weather over time. Check whether the quote includes hot-dip galvanizing for iron parts, powder coating, or both, and confirm the color you selected.

Ask for the color to be written clearly in the specification, including the reference name or code if one is used. A color described only as "similar to the sample" can lead to disappointment.

Clarify the Installation Scope

The contract should explain who is responsible for installation and what that includes. Some quotes cover only delivery, while others include fixing the frame, sealing, adjusting the leaf and cleaning up afterwards.

Confirm who handles any wall preparation, anchoring and final adjustment. If the door is going into a shared entrance, check whether building committee approval is required and whether that step is your responsibility or the supplier's.

Approve the Work Before Production Starts

A sound process ends with your written approval before the door goes into production. Read the final drawing and specification once more, and make sure every point you care about is included.

Once you approve, changes can be costly, so take your time. Ask any remaining questions now, while the design can still be adjusted without delay.

Frequently asked questions

Should I measure the opening myself before requesting a quote?

You can take rough measurements to start the conversation, but accurate on-site measurement by the manufacturer is the safer choice. Small differences can affect fit and operation.

What is the most important thing to check in the contract?

Check that the written specification matches the drawing and the options you approved. Materials, dimensions, finish and installation scope should all be clearly stated.

Do I need a drawing before the door is made?

Yes, a drawing and written specification help both sides confirm the design before production. It reduces the risk of misunderstandings after the door is built.

Can I request changes after signing?

Changes are possible but may affect the work already planned. It is best to resolve all questions before you sign and approve the final drawing.

Common mistakes to avoid

Many buyers sign based on a photo or a verbal description without checking the exact measurements and specification. Skipping the drawing review is a common reason for disappointment after installation.

Our recommendation

Ask for the drawing and specification in writing, then compare them line by line with what you discussed on site. Keep a copy of the approved documents for your records.

Summary

Verify measurements, materials, drawings, finishing and installation scope in writing before signing. A careful review now prevents costly changes later.

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