How to hem a curtain?

Mastering the creation of a curtain hem is an essential skill for any home decor and sewing enthusiast. Whether you want to shorten a store-bought curtain, customize a made-to-measure curtain, or give new life to an old fabric, achieving a perfect hem is the key to successful window dressing. This detailed tutorial guides you step-by-step, whether you're a beginner with a needle or an expert with a sewing machine. We will cover all techniques, from a simple hand-sewn hem to a machine-sewn hem, including tips for thick fabrics or delicate sheers. Prepare your tape measure, scissors, and iron: it's time to learn how to make a perfect curtain hem!

Making a hem yourself allows for a perfect length and a custom finish.

Why Learn to Make a Curtain Hem?

In the world of home decor, details make all the difference. A well-hanging curtain, with a neat hem at the right height, transforms a room's ambiance. Beyond aesthetics, knowing how to make a curtain hem offers you complete freedom: to adapt any model to your windows, whether it's a large or a small skylight, and to create harmonious ensembles like a perfectly coordinated double curtain.

The Advantages of a Successful Hem

• Perfect customization: Adjust the exact length, from a floor-length curtain to one that grazes the windowsill.
• Savings: Transform a standard curtain into a unique piece without paying the custom-made price.
• Professional aesthetic: A well-sewn hem gives a finished, high-end look to your home decor.
• Adaptability: Easily change the look of your curtains by modifying their length according to your desires.

What is a Curtain Hem? Definitions and Types

The curtain hem is the lower (and sometimes side) edge of the fabric that is folded over itself and secured by stitching. It prevents fraying and slightly weights the bottom of the curtain for a more elegant drape. The choice of hem type depends on the fabric, use, and desired effect.

The Different Types of Hems for Curtains

• Simple hem (or straight hem): The most common. The edge is folded once, then a second time to hide the raw edge, and sewn. Ideal for most fabrics, including thick curtains.
• Rolled hem (or narrow hem): Perfect for lightweight sheers, silk, or fine linen. The edge is rolled onto itself and sewn with small, invisible hand stitches. This is the solution for making a sheer curtain hem without weighing it down.
• Hem with fusible tape: A quick, no-sew method using an adhesive strip that melts under the heat of an iron. Perfect for beginners or quick alterations.
• Invisible hem (or blind hem): Done by hand with a specific stitch that is not visible on the right side of the fabric. This is the high-end finish for interior curtains.

The Essential Toolbox

To make a curtain hem properly, you need the right equipment. Here is the list of essential tools, which you can find in a haberdashery or in our selection of curtain accessories.

Measuring and Preparation Tools

• Metal tape measure: For precise measurements of the window and curtain.
• Sewing ruler (or flat ruler) and square: For marking right angles and perfectly straight lines.
• Tailor's chalk or water-erasable pen: To mark the fabric without damaging it.
• Straight pins and/or safety pins: To hold the hem fold in place before sewing.

Sewing and Finishing Tools

• A pair of sharp sewing scissors: Exclusively reserved for fabric.
• Thread matching your curtain: For discreet stitching.
• Sewing needles (for hand) and appropriate machine needles: A fine needle for sheers, a sturdier one for thick curtains.
• Sewing machine: Optional but very useful for saving time and achieving even stitching. Our machine-sewn curtain hem tutorial will explain its settings.
• Iron and ironing board: The secret tool for a perfect hem! A well-pressed fold is an easy-to-sew fold.

Step 1: Measuring Correctly for a Perfect Hem

This is the most crucial step. A measurement error and your curtain will be too short or too long. Follow this curtain hem tutorial meticulously to avoid disappointment.

How to Take Measurements for the Final Length

1. Hang your curtain rod in its final position.
2. Hang the curtain on the rod, with its curtain rings or hanging system.
3. Determine the desired length: Floor-length curtain, grazing the floor, or stopping at the windowsill? Use a tape measure to measure from the top of the rod (or hook) to the desired point. This is the FINAL length (Lf).
4. Measure your unhemmed curtain: Lay it flat. Measure its current length from the top to the raw edge. This is the INITIAL length (Li).

Calculating the Hem Width and Cutting

The formula is simple: Excess to cut = Li - Lf.
This excess will be used to form the hem. For a classic simple hem, you typically plan for a hem 8 to 15 cm high (final fold). Therefore, add an extra 1 to 2 cm to this excess for the fold of the raw edge. For example, for a finished 10 cm hem, you would need to cut an excess of 11 to 12 cm.

Curtain hem tip: For thick or heavy curtains, a wider hem (15-20 cm) provides better balance and weights the bottom well. For sheers, a narrow hem (5-8 cm) or a rolled hem is sufficient. What is the difference between a blackout curtain Short crochet cotton curtains What is the difference between a blackout curtain

Step 2: Preparing and Marking the Hem

1. Cut the excess fabric: Mark a straight line with chalk at the calculated distance (Excess) from the bottom edge. Check for horizontality with your square across the entire width of the curtain. Cut carefully.
2. Mark the first fold: On the wrong side of the fabric, fold the bottom edge over by 1 cm (to hide the raw edge) and press this first fold across the entire width. This is called the "clean finish hem."
3. Mark the main fold: Fold the fabric again to the desired finished hem height (e.g., 10 cm). The small 1 cm edge should be enclosed inside. Pin all along, every 15-20 cm.
4. Press thoroughly: This is the magical step that sets the fold and makes sewing easier. Good pressing is half the work!

Step 3: Sewing the Hem – Several Methods to Choose From

This is the moment to permanently secure your hem. Choose the method that matches your equipment and fabric.

Method 1: Sewing a Hem with a Sewing Machine

Ideal for speed and durability, especially for large curtains or standard fabrics.

1. Set your machine to a medium-length straight stitch (2.5-3).
2. Use an appropriate needle (universal for cotton, reinforced for thick fabrics).
3. Sew about 2-3 mm from the inner edge of the fold (the edge folded upwards). Maintain a steady speed.
4. For corners, lift the presser foot, turn the fabric, lower the foot, and continue.
5. Tip: For a clean finish, you can finish the raw edge of the fabric with a zigzag stitch before making the folds, especially on fabrics that fray.

Looking for a more visual machine-sewn curtain hem tutorial? Many online videos perfectly complement these instructions.

Method 2: Making a Hem by Hand (Invisible Stitch)

The queen technique for a perfectly discreet result, recommended for noble fabrics and hems visible from the front.

1. Thread a fine needle with matching thread. Make a knot.
2. Inside the fold, insert the needle into the fold (only through the thickness of the fold, not through the entire curtain) for 2-3 mm.
3. Bring the needle out, and catch just a single thread from the main curtain fabric, right opposite your exit point.
4. Re-insert the needle into the fold, advance 5 mm inside the fold, and bring it out. Repeat.
5. The thread should remain slightly loose, without pulling. Once finished, the stitch is invisible on the right side.

Method 3: The Fusible Hem (No-Sew)

The express solution! Perfect for quick alterations or synthetic fabrics like polyester sheers.

1. Prepare your hem as for sewing (two folds).
2. Slide a strip of fusible tape inside the fold, against the edge of the first fold.
3. Press with a hot iron (no steam), applying firm pressure for 10-15 seconds per section.
4. Let it cool completely before handling.

Special Cases: Tips for All Types of Curtains

How to Make a Hem for Thick or Velvet Curtains?

Heavy fabrics (velvet, jacquard, lined) require some adaptations. Use strong and numerous pins. For the machine, a Jeans needle (No. 100/110) and strong thread are essential. Mark your folds with safety pins rather than straight pins. Pressing must be done carefully, sometimes with a press cloth to avoid marking the velvet. A thick curtain hem can also be sewn by hand with a sturdier stitch for more discretion.

How to Make a Hem for Sheer or Very Light Curtains?

For sheers, lightness is paramount. The hand-rolled hem is the most elegant technique. Otherwise, a very fine fusible hem works well. Avoid hems that are too wide as they would weigh down the fabric. When sewing by machine, reduce the thread tension to prevent the fabric from puckering.

Hem for Patio Door Curtains and Large Widths

For a , work on a large table or on the floor if possible. Measure at several points because the floor may be uneven. While sewing, gently roll the curtain onto your arm to avoid dragging all the weight. Consider browsing our curtain collection of all styles for inspiration for your large bay windows.

Conclusion: The Pleasure of Custom-Made Curtains

Learning how to make a curtain hem is much more than a simple sewing technique. It's a passport to fully personalized home decor, where every detail reflects your taste. Whether you opted for the quick machine method, the care of the invisible hand stitch, or the fusible tape trick, you now possess the know-how to dress all your windows with elegance and precision.

Remember that the key to a beautiful curtain lies in precise measurements, careful pressing, and a little patience. Don't hesitate to practice on a piece of fabric before starting on your finest blackout curtain. And to complete your installation, explore our range of curtain hooks and rods for a perfect setup.