1. Door Opening Width and Height
The first step in a door opening measurement is to establish the actual structural opening rather than estimating the screen size from the existing door panel.
For B2B projects, each opening should be measured independently when practical. Even doors manufactured from the same architectural drawings can show dimensional differences after masonry, plastering, flooring, tile installation, or frame fitting.
Measure width at three positions
Measure the clear opening width at:
Top
Middle
Bottom
Record all three dimensions rather than only the smallest value.
| Measurement | Example Reading | Procurement Purpose |
|---|---|---|
| Top width | 912 mm | Detects upper-frame variation |
| Middle width | 908 mm | Indicates central opening condition |
| Bottom width | 904 mm | Checks floor-level restriction |
| Minimum width | 904 mm | Reference for fit calculation |
If the three measurements differ significantly, do not automatically average them. The correct production dimension depends on the screen system and whether it is installed inside the opening or onto the face of the frame.
For a recessed installation, the minimum usable width is normally more important because the screen must physically pass through the narrowest section of the opening.
Measure height at three positions
Measure vertical height at the:
Left side
Center
Right side
| Measurement | Example Reading | Procurement Purpose |
|---|---|---|
| Left height | 2104 mm | Checks jamb condition |
| Center height | 2101 mm | Identifies head variation |
| Right height | 2097 mm | Checks opposite jamb |
| Minimum height | 2097 mm | Reference for fit calculation |
Measure after the finished floor has been installed whenever possible. A door opening measured before tile, stone, wood flooring, or other floor finishes are installed can change substantially.
For project procurement, the measurement sheet should distinguish between structural opening dimensions, finished opening dimensions, and final screen manufacturing dimensions.
2. Floor Clearance and Bottom Track Conditions
Floor clearance directly affects screen operation, especially for sliding, pleated, retractable, and bottom-track systems.
Measure the distance between the finished floor and the lowest point of the door frame or threshold.
Do not measure from unfinished concrete if the final floor surface has not yet been installed.
Check the finished-floor condition
| Item | What to Record | Why It Matters |
|---|---|---|
| Finished floor level | mm | Establishes actual screen height |
| Threshold height | mm | Determines bottom clearance |
| Local floor slope | mm variation | May affect screen alignment |
| Drainage channel | Position + depth | Can interfere with track |
| Door sill projection | mm | May restrict mounting |
| Floor obstructions | Position + size | Affects installation |
A screen that fits the nominal opening can still fail to operate if the bottom rail, track, or guide contacts the floor.
For commercial projects, inspect the complete floor condition at representative locations before releasing a large production order.
Allowance is system-specific
There is no universal clearance value that applies to every mosquito screen system.
The required allowance depends on:
Screen construction
Aluminum extrusion profile
Roller or guide mechanism
Bottom track design
Installation method
Floor tolerance
Required operating clearance
Therefore, the buyer should provide the measured opening dimensions first. The screen manufacturer should then confirm the applicable manufacturing deductions or installation allowances for the selected system.
3. Frame Reveal and Installation Depth
Frame reveal is the usable surface or recess available for mounting the mosquito screen system.
This measurement is often overlooked during project procurement.
A door opening may have adequate width and height but insufficient mounting depth for the selected screen profile.
Measure the available frame surface from the door edge toward the surrounding wall or adjacent obstruction.
| Site Condition | Measurement Required | Potential Issue |
|---|---|---|
| Recess installation | Recess width and depth | Profile may not fit |
| Face installation | Flat mounting surface | Insufficient fixing area |
| Aluminum door frame | Frame reveal | Profile interference |
| Sliding door | Adjacent panel position | Screen collision |
| Curtain wall | Mullion position | Limited fixing area |
| Door with trim | Trim projection | Mounting obstruction |
Check the frame reveal at multiple points
If the frame is irregular, measure the available reveal at the top, middle, and bottom.
Also record:
Door hinges
Handles
Locks
Weather seals
Door closers
Decorative trim
Adjacent fixed panels
Existing tracks
These components can reduce the effective installation space even when the nominal opening dimensions appear correct.
For a ►[Custom Screen Door], the opening dimensions alone are not sufficient for production approval. The manufacturer also needs the installation configuration and mounting condition.
4. Recess Fit vs. Face Fit
Before converting measurements into an order size, identify the installation method.
Recess-mounted screen
A recess-mounted screen is positioned inside the available opening or frame cavity.
The measurement priority is:
Minimum clear width + minimum clear height + available depth
The screen manufacturer normally determines the required production deductions based on the system profile and operating mechanism.
Face-mounted screen
A face-mounted system is installed over the opening on the surrounding frame or wall surface.
The measurement priority changes to:
Required coverage area + available mounting surface + surrounding obstructions
| Factor | Recess Fit | Face Fit |
|---|---|---|
| Primary measurement | Clear opening | Coverage area |
| Width reference | Minimum opening width | Required external width |
| Height reference | Minimum opening height | Required external height |
| Depth | High importance | System dependent |
| Frame reveal | Required | Required |
| Wall condition | Secondary | Often important |
| Production deduction | System-specific | System-specific |
This distinction should be confirmed before a quotation becomes a production order.
5. Uneven Door Openings
Not every opening is square.
An opening can have different widths at the top and bottom or different heights on the two sides because of construction tolerances, settlement, frame installation, or floor conditions.
Perform a diagonal check
Measure both diagonals:
Top-left corner → bottom-right corner
Top-right corner → bottom-left corner
| Check | Example |
|---|---|
| Diagonal A | 2289 mm |
| Diagonal B | 2297 mm |
| Difference | 8 mm |
A difference between the two diagonals indicates that the opening is not perfectly square.
The diagonal measurement should not be used to calculate the production size by itself. It is a diagnostic measurement that helps identify geometry problems.
Record variation instead of hiding it
For project orders, report the actual measurements.
For example:
Width: 904 / 908 / 912 mm
Height: 2097 / 2101 / 2104 mm
Diagonal difference: 8 mm
Floor clearance: 6 mm
Frame reveal: 32 mm
This gives the manufacturer enough information to determine whether the selected screen system can accommodate the opening.
If an opening exceeds the adjustment capability of the selected system, the solution may require frame correction, a different installation method, a different screen system, or a revised opening.
6. Do Not Convert Opening Size Directly Into Production Size
One of the most common procurement errors is sending a measurement such as:
900 × 2100 mm
and treating it as the finished mosquito screen size.
These are two different dimensions.
| Dimension Type | Definition | Used For |
|---|---|---|
| Opening size | Actual clear architectural opening | Site measurement |
| Screen coverage size | Area the screen must cover | System selection |
| Finished screen size | External dimensions of assembled unit | Installation |
| Production size | Dimensions used for component manufacturing | Factory production |
The manufacturing dimensions may require deductions or additions based on the specific screen system.
For this reason, buyers should send the actual site measurements and installation configuration to the supplier instead of applying their own deduction formula unless that formula has already been confirmed by the manufacturer.
7. Measurement Procedure for Uneven Openings
For large residential developments, hotels, apartment projects, and commercial buildings, use the same measurement procedure at every opening.
Recommended site sequence
Step 1 - Identify the opening
Assign a unique opening number such as:
D-001
D-002
D-003
Do not identify openings only by room name if multiple doors have similar configurations.
Step 2 - Measure width
Record top, center, and bottom widths.
Step 3 - Measure height
Record left, center, and right heights.
Step 4 - Measure both diagonals
Record diagonal A and diagonal B.
Step 5 - Measure floor clearance
Use the finished floor as the reference plane.
Step 6 - Measure frame reveal
Record usable mounting surface and installation depth.
Step 7 - Record obstructions
Photograph or document handles, hinges, thresholds, tracks, trims, and adjacent doors.
Step 8 - Confirm installation method
Specify:
Recess mount
Face mount
Inside mount
Outside mount
Side-mounted
Top/bottom track configuration
Step 9 - Submit the measurement sheet
The supplier should review the dimensions before production.
8. Door Measurement Sheet for Bulk Procurement
For a multi-unit project, use one standardized measurement sheet.
| Field | Example |
|---|---|
| Project | Hotel Building A |
| Opening ID | D-018 |
| Door type | Hinged balcony door |
| Width top | 912 mm |
| Width center | 908 mm |
| Width bottom | 904 mm |
| Height left | 2104 mm |
| Height center | 2101 mm |
| Height right | 2097 mm |
| Diagonal A | 2289 mm |
| Diagonal B | 2297 mm |
| Finished floor | Yes |
| Floor clearance | 6 mm |
| Frame reveal | 32 mm |
| Installation depth | 25 mm |
| Mounting method | Face mount |
| Obstructions | Handle on right |
| Screen system | To be confirmed |
| Quantity | 1 |
For 100 or 1,000 openings, consistency matters more than the format of the document. Every opening should use the same measurement fields.
9. Custom Mosquito Screen Door Order Confirmation Checklist
Before approving production, verify the following information.
Dimension confirmation
Width measured at top, center, and bottom
Height measured at left, center, and right
Minimum width identified
Minimum height identified
Both diagonals recorded
Uneven opening identified
Finished floor confirmed
Installation confirmation
Recess or face fit confirmed
Frame reveal measured
Installation depth confirmed
Floor clearance checked
Threshold condition recorded
Door swing direction confirmed
Adjacent door or panel clearance checked
Product confirmation
Screen system confirmed
Mesh material confirmed
Aluminum extrusion profile confirmed
Frame finish/color confirmed
Opening direction confirmed
Hardware configuration confirmed
Manufacturing dimensions approved
Commercial confirmation
Quantity confirmed
Opening schedule approved
Packaging requirements confirmed
Installation instructions confirmed
Sample or first article approved where required
Final production drawing approved
For buyers comparing a ►[Custom Screen Door] with a ►[Pleated Screen Door], the measurement procedure should be completed before the system is selected for a large project. The opening geometry can determine whether a particular frame and track configuration is suitable.
10. Factory Review Before Mass Production
For B2B orders, a reliable workflow separates site measurement, technical review, and production release.
A practical sequence is:
Site measurement → Measurement sheet → Technical review → Production dimension confirmation → Sample/first article → Mass production
This prevents a common failure mode: applying the same production deduction to every opening despite measurable differences between openings.
For a project containing multiple door types, group the openings by configuration rather than assuming that every door uses one screen specification.
For example:
| Door Group | Width Range | Height Range | Installation | Screen Configuration |
|---|---|---|---|---|
| Type A | 850–950 mm | 2000–2150 mm | Face | Single screen |
| Type B | 1400–1800 mm | 2000–2200 mm | Face | Double configuration |
| Type C | 700–850 mm | 1900–2100 mm | Recess | Single screen |
The final grouping should be based on actual project measurements and the selected screen system's dimensional limits.
11. Measurement Errors That Cause Rework
Several measurement practices create avoidable production problems.
Measuring only once
One measurement does not reveal taper or frame distortion.
Measuring before floor completion
Final flooring can reduce the available screen height and bottom clearance.
Measuring the existing door instead of the opening
The door panel dimensions do not necessarily represent the usable screen installation area.
Ignoring frame reveal
A screen may have adequate opening dimensions but insufficient space for its aluminum profile.
Applying a universal deduction
Screen systems have different frame structures and installation requirements. A deduction suitable for one product cannot automatically be transferred to another.
Ignoring diagonal variation
An opening can have the correct width and height but still be out of square.
Combining different door types
Hinged doors, sliding doors, French doors, and large balcony openings can require different screen configurations.
12. B2B Procurement Recommendation
For distributors, contractors, and commercial procurement teams, the objective is not simply to obtain a width × height number. The objective is to provide enough dimensional information for the factory to determine a reproducible production specification.
A good RFQ should include:
Opening width at three points
Opening height at three points
Two diagonal measurements
Finished-floor status
Floor clearance
Frame reveal
Installation depth
Mounting method
Door type
Opening direction
Obstruction information
Required quantity
Project drawings or photographs when available
For repeat orders, keep the measurement sheet as part of the project quality record. If a screen needs replacement later, the original opening data can be used to trace the product configuration.
Conclusion
Accurate door opening measurement is the first technical control point for a custom mosquito screen door. Width and height should be measured at multiple positions, while floor clearance, frame reveal, installation depth, diagonals, and obstructions should be recorded before production dimensions are confirmed.
For bulk procurement, the safest workflow is to send actual site measurements to the manufacturer, confirm the installation method and system-specific allowances, approve the final production dimensions, and then release mass production.
Need a quotation for a multi-unit project? Send your opening schedule, quantities, installation conditions, and required screen type to Xiamen Weiziran for a production review and bulk-order quotation.
FAQ
How many measurements are required for a custom mosquito screen door?
Measure width at the top, center, and bottom; height at the left, center, and right; both diagonals; floor clearance; and frame reveal. Additional measurements may be required for unusual frames or obstructions.
Should I order a custom mosquito screen using the exact door opening size?
No. The opening size and production size are different. Provide the actual measured opening dimensions and installation method. The manufacturer should confirm the required production deductions or additions for the selected screen system.
Can a custom screen door fit an uneven opening?
It depends on the degree of variation and the adjustment range of the selected system. Record all width, height, and diagonal measurements so the manufacturer can determine whether the opening requires adjustment or another installation configuration.
