Ordering custom mosquito screens or pet-proof folding doors is one of the best investments you can make for your home. But before you can enjoy a mosquito-free, pet-friendly living space, there's one crucial step that can make or break the entire process: measuring your windows and doors correctly.

At MBORMC, we manufacture custom screens to your exact specifications. This means we rely on you to provide accurate measurements. A mistake of just a few millimetres can result in a screen that doesn't fit properly — and that could leave gaps for mosquitoes to enter, or require costly remanufacturing.

This comprehensive guide will walk you through everything you need to know about measuring your windows and doors for custom mosquito screens, including:

• What tools you need
• How to measure different window types (casement, sliding, sash, tilt-and-turn)
• How to measure doors for pet-proof folding doors
• Common mistakes to avoid
• What to do if your window is an unusual shape

Let's get started.

1. Tools You'll Need

Before you start measuring, gather these simple tools:

• A steel tape measure — not a cloth or plastic one. Steel tape measures are more accurate and won't stretch. A 5-meter (16-foot) tape is ideal.
• A pencil and paper — to record your measurements. Write them down clearly and label them immediately.
• A smartphone or camera — to take photos of your windows. This is incredibly helpful if you need to clarify anything with our team. Photos help us understand your window type and any unique features (such as handles, locks, or obstructions).
• A step ladder — if your windows are high up, you need to be able to reach the top comfortably.
• A level — optional, but helpful for checking if your window frame is square.

That's it. No special skills or expensive equipment are required.

2. How to Measure Standard Windows

Most windows fall into a few standard categories. Here's how to measure each type.

Casement Windows (Hinged, Open Outward or Inward)

Casement windows are the most common type of window in Europe and are also found widely in Australia, New Zealand, and parts of North America. They are hinged on one side and open outward or inward.

• Width: Open the window and measure from the inside edge of the left frame to the inside edge of the right frame. This is the "clear opening" where the screen will sit. Take measurements at the top, middle, and bottom — use the smallest.
• Height: Measure from the inside edge of the top frame to the inside edge of the bottom frame (the sill). Take measurements on the left side, centre, and right side — use the smallest.
• Note: When the window is closed, the screen will sit on the inside of the window frame. Ensure the magnetic base will have a smooth, flat surface to adhere to.

Sliding Windows (Sliding Sash)

Sliding windows move horizontally on tracks. They are common in North America, Australia, and many parts of Asia.

• Width: Measure the width of the opening from the inside edge of the left track to the inside edge of the right track. Measure at the top, middle, and bottom — use the smallest.
• Height: Measure the height of the opening from the inside edge of the top track to the inside edge of the bottom track. Measure on the left, centre, and right — use the smallest.
• Note: Sliding windows often have handles or locks that protrude. Ensure your screen will sit flat against the frame and not interfere with these fittings.

Double-Hung & Single-Hung Windows

These windows have two sashes that slide vertically. They are common in North America.

• Width: Measure the width of the opening from the inside edge of the left jamb to the inside edge of the right jamb. Measure at the top, middle, and bottom — use the smallest.
• Height: Measure the height of the opening from the inside edge of the top jamb to the inside edge of the bottom jamb (the sill). Measure on the left side, centre, and right side — use the smallest.

Tilt-and-Turn Windows

Tilt-and-turn windows are common in Germany, Poland, Scandinavia, and across mainland Europe. They can tilt inward at the top for ventilation or open fully inward like a door.

• Width: Measure the clear opening width from the inside edge of the frame on the left to the inside edge of the frame on the right. Measure at the top, middle, and bottom — use the smallest.
• Height: Measure the clear opening height from the inside edge of the top frame to the inside edge of the bottom frame. Measure on the left, centre, and right — use the smallest.
• Note: Tilt-and-turn windows often have multi-point locking hardware. The screen will be installed on the inside of the frame, so ensure there is enough flat surface for the magnetic base to adhere securely.

3. How to Measure Doors (for Pet-Proof Folding Doors)

If you're ordering one of our pet-proof folding doors for your patio, balcony, or French doors, the measurement process is slightly different. You need to measure the full door opening — not just the door itself.

• Width: Measure the full width of the door opening from the inside edge of the left frame to the inside edge of the right frame. Measure at the top, middle, and bottom — use the smallest. For double doors, measure each door opening separately.
• Height: Measure the full height of the door opening from the inside edge of the top frame to the floor or threshold. Measure on the left side, centre, and right side — use the smallest.
• Special Considerations: For sliding patio doors, measure the width of the entire opening (not just the moving panel). The screen will cover the full opening. For French doors, measure each door separately and note which door opens (or both).

4. How to Measure Unusual Window Shapes

Not all windows are rectangular. If you have arched, circular, triangular, or trapezoidal windows, don't worry — MBORMC can handle them. Here's what to do:

• Width: Measure the widest point of the opening.
• Height: Measure the tallest point of the opening.
• Take a photo: This is essential. We need to see the shape to understand how to manufacture your screen. Include a ruler or tape measure in the photo for scale.
• Provide a sketch: If possible, draw a simple sketch of the window with measurements marked. This is incredibly helpful for complex shapes.
• Contact us: For unusual shapes, we may suggest specific solutions (such as a frame-mounted screen rather than an adhesive magnetic screen). We'll work with you to find the best solution.

5. Common Measuring Mistakes to Avoid

Even with the best intentions, mistakes happen. Here are the most common errors people make when measuring windows — and how to avoid them:

• Measuring the outside of the frame: Always measure the inside opening where the screen will sit, not the outer frame dimensions. The screen needs to fit inside the frame.
• Measuring only once: Always take multiple measurements (top, middle, bottom for width; left, centre, right for height). Window frames are often not perfectly square, and using the smallest measurement ensures a proper fit.
• Forgetting about handles and locks: If your window has a protruding handle or lock, measure to ensure there's enough clearance. The screen should sit flat against the frame without interfering with the hardware.
• Using the wrong units: Be consistent with your units. Use millimetres (mm) or centimetres (cm) for the greatest accuracy. If you use inches, ensure all measurements are in the same unit.
• Not taking photos: Photos are your insurance policy. If we have a photo of your window, we can help you spot any potential issues before manufacturing begins.
• Rounding measurements down: If you round down, the screen may be too small. Always round up to the nearest millimetre for the width and height, but use the smallest measurement from your multiple readings.

6. What to Do After You've Measured

Once you've taken all your measurements and photos, here's what to do next:

• Record them clearly: Write down your measurements in a clear, organised way. Label which window or door each measurement is for.
• Double-check: Measure each window at least twice to verify your numbers. If you get a different result, measure a third time and use the most consistent measurement.
• Contact us: Send us your measurements, photos, and any questions. We'll review everything and confirm that you're ready to order.
• Place your order: Once your measurements are confirmed, we'll manufacture your custom screens in our Foshan factory and ship them directly to your doorstep.

7. Why Accurate Measurements Matter

Your custom mosquito screens and pet-proof folding doors are manufactured to your exact specifications. A perfect fit means:

• No gaps for mosquitoes: The 360° magnetic seal works best when the screen is a perfect fit. Any gaps, no matter how small, can allow insects to enter.
• Longer lifespan: A well-fitting screen won't be stretched or strained, so it will last longer.
• Easier installation: When the screen fits perfectly, installation takes just 15 minutes.
• Peace of mind: You'll know that your home is fully protected.

8. Quick Measurement Reference Table

Conclusion

Measuring your windows and doors for custom mosquito screens is a simple process that anyone can do with a tape measure and a few minutes of time. By following this guide, you'll ensure a perfect fit for your screens — and the protection your home deserves.

At MBORMC, we're here to help. If you have any questions about measuring or ordering, don't hesitate to contact us. Our team is ready to assist you with any questions you may have.

Protect your home. Protect your family. Protect your pets. Choose MBORMC.