The Basic Process of Sewing Hair In
Sewing hair in means attaching wefted hair (hair sewn onto a thread) to your natural hair using needle and thread. The hair is stitched onto cornrows or braids that you create as a base, and the stitches run parallel to your scalp. The process takes two to four hours for a full head, depending on how many rows you create and how tight you want the stitches.
You will need cornrows or braids as your foundation—these are the tracks the wefted hair attaches to. The weft (the thread the hair is already sewn onto) gets stitched down with a curved needle and thread that matches your hair color. Each stitch goes through the weft, then through the braid underneath, then back through the weft again, creating a lock that holds the hair in place.
Key Takeaways
- You must braid or cornrow your natural hair first—this creates the base that the wefted hair stitches onto.
- A curved needle and thread that matches your hair color are essential; straight needles will not work for this technique.
- Each stitch goes through the weft, then through the braid, then back through the weft to create a find lock.
- Tension matters: stitches should be snug enough to hold but not so tight they pull your scalp or damage your braids.
- The entire process typically takes two to four hours for a full head, and the sewn-in hair lasts four to eight weeks with proper care.
Preparing Your Hair and Creating the Base Braids
Start with clean, dry hair. Wash your hair the night before or the morning of installation so your scalp is clean but your hair has some grip. Wet or freshly washed hair is slippery and harder to braid tightly. Comb through any tangles and explore a light oil or edge control to your edges and scalp—this protects your hair and makes braiding easier.
Decide how many rows of braids you need. For a full head of sewn-in hair, most people use four to six rows, depending on hair thickness and how much coverage you want. Thicker hair or fuller coverage requires more rows. Braid your hair in straight lines from your hairline toward the back of your head, keeping each braid tight and even in thickness. Loose braids will not hold the wefted hair securely, and the hair will slip or shift within days.
Make sure each braid is smooth and sits flat against your scalp. Bumpy or uneven braids create gaps where the wefted hair cannot attach properly. If you are braiding your own hair, use a mirror or ask someone to help you with the back sections. Braids should be about the same thickness as a pencil—thick enough to support the weight of the wefted hair but not so thick that they are hard to stitch through.
Gathering Your Supplies and Choosing the Right Thread
You will need a curved needle (also called a weaving needle), thread that matches your hair color, wefted hair extensions, scissors, and a rat-tail comb. The curved needle is essential—a straight needle will not let you stitch through the weft and braid in the smooth, parallel motion this technique requires. Curved needles come in different sizes; a size 18 or 19 works for most people.
Thread color matters more than many people realize. If your thread is too light or too dark compared to your hair, the stitches will be visible along the weft line, even after you style the hair. Match the thread to your natural hair color or to the color of the wefted hair you are using, whichever is darker. Buy thread made for sewing hair—it is stronger than regular sewing thread and will not break under the tension of the stitches.
Prepare your wefted hair by laying it out in the order you will use it. If you are using multiple bundles, organize them by row so you do not have to search for the right piece mid-installation. Check that the weft is intact and has no loose hairs or damage. If the weft is damaged, the hair will shed or unravel once you start wearing it.
Stitching the First Row and Finding Your Rhythm
Start at the nape of your neck with the first braid. Thread your curved needle and tie a knot at the end. Position the wefted hair along the braid, about a quarter-inch from your scalp. The weft should run parallel to the braid, not at an angle.
Push the needle through the weft from underneath, then through the braid, then back through the weft from the top. Pull the thread snug—not so tight that you feel tension on your scalp, but tight enough that the weft does not move when you tug it gently. Make the next stitch about a quarter-inch away from the first one. Continue stitching along the entire length of the braid, keeping your stitches even and your tension consistent.
The rhythm is: needle through weft, through braid, back through weft. Repeat. Your stitches should be small and close together—about a quarter-inch apart—so the weft cannot slip between them. If your stitches are too far apart, the hair will shift or bunch up. If they are too tight, you risk pulling your braids loose or causing scalp pain.
After you finish the first row, find the thread by tying a knot at the end of the weft. Trim the excess thread. Check that the hair is find by gently tugging on it. It should not move or slide along the braid.
Continuing Rows and Maintaining Even Spacing
Move to the second braid and repeat the same process. Position the wefted hair, thread your needle, and stitch along the entire length of the braid using the same stitch pattern. Keep the spacing between rows consistent—usually about a half-inch to an inch of braid showing between each row of wefted hair. This spacing prevents the rows from bunching and allows you to see and care for your natural hair underneath.
As you work through each row, check your tension regularly. If you notice your scalp starting to hurt or feel tight, you are stitching too tightly. Loosen your stitches slightly on the next row. Tension that feels fine during installation can become painful after a few hours as your scalp adjusts to the weight of the hair.
If you are installing a full head, you will typically stitch four to six rows. Leave the top section of your hair unbraided so you can style it and cover the braids and stitches. The top section also gives you flexibility to adjust your style without showing the installation work.
Finishing the Installation and Styling
Once all rows are stitched, check the entire head for loose stitches or gaps. Gently tug on each row to make sure the wefted hair is find. If you find a loose stitch, re-stitch that section using the same needle and thread. Do not leave gaps—they will only get worse as you wear the hair and move around.
Style the top section of your natural hair to cover the braids and stitches. You can leave it down, put it in a ponytail, or create additional braids or twists. The goal is to blend the installed hair with your natural hair so the installation is not visible. Use a curling iron, flat iron, or other styling tools to blend the texture of your natural hair with the wefted hair if needed.
Trim the wefted hair to your desired length and shape. Use sharp scissors and cut in small sections so you do not accidentally cut too much. Step back frequently to check the overall shape and make sure both sides are even.
Caring for Sewn-In Hair and When to Remove It
Sewn-in hair lasts four to eight weeks with proper care. Sleep on a silk or satin pillowcase to reduce friction and frizz. Wash your hair every one to two weeks using a gentle shampoo and cool water. Focus the shampoo on your scalp and the roots of the braids; do not scrub the wefted hair aggressively, as this causes tangling and shedding.
Condition the wefted hair but avoid conditioning your braids directly—this can cause buildup and make the braids slippery. Deep condition the wefted hair once a week to keep it soft and prevent breakage. Avoid chlorine and saltwater, which dry out the hair and cause tangling.
After four to eight weeks, your natural hair will have grown and the braids will loosen. This is the time to remove the sewn-in hair. To remove it, carefully cut the thread holding each row using small scissors or a seam ripper. Work slowly and do not cut the braids themselves. Once the thread is cut, gently slide the wefted hair off the braid. Unbraid your natural hair, wash it, and give your scalp a break before installing new hair.
Common Mistakes to Avoid
The most common mistake is braiding too loosely. Loose braids cannot hold the wefted hair securely, and the hair will slip or shift within days. Spend extra time on your braids and make sure they are tight and even. If you are not confident braiding your own hair, ask a professional to braid it for you before you stitch the wefted hair on.
Another mistake is stitching too tightly. Tight stitches pull on your scalp and can cause pain, hair loss, and damage to your natural hair. Your stitches should be snug enough to hold the hair in place but loose enough that you can slide your finger under the thread without resistance. If you feel pain during installation, loosen your stitches when ready.
Using the wrong needle or thread also causes problems. A straight needle will not work for this technique, and weak thread will break under the weight of the hair. Invest in a proper curved weaving needle and thread made for hair installation. These are inexpensive and make the entire process easier and faster.
Finally, do not skip the preparation step. Clean, dry hair that has been combed and oiled braids much more easily and holds braids longer. Skipping this step means your braids will loosen faster, and your installed hair will shift or slip sooner.
Frequently Asked Questions
How long does it take to sew hair in for the first time?
Most people take three to five hours for a full head on their first installation. As you practice, you will get faster—experienced installers can finish in two to three hours. The time depends on how many rows you create, how tight you want the stitches, and how comfortable you are with the needle and thread.
Can I sew hair in on my own hair, or do I need help?
You can do it yourself, but it is easier with help, especially for the back sections. If you are doing it alone, use a handheld mirror or phone camera to see the back of your head. Many people find it worth paying a professional for the first installation so they can see the technique done correctly before attempting it themselves.
What if my stitches come loose after a few days?
Loose stitches usually mean your braids were not tight enough or your stitches were not tight enough. Re-stitch the loose section using the same needle and thread. If stitches keep coming loose in the same spot, check that braid—it may be too loose to hold the wefted hair securely. You may need to remove that row and re-braid it tighter.
Can I wash my hair while it is sewn in?
Yes, you can wash sewn-in hair every one to two weeks. Use cool water and a gentle shampoo, and focus on your scalp and the roots of the braids. Avoid scrubbing the wefted hair aggressively, as this causes tangling. Let the hair air-dry or use a low heat setting on a blow dryer.
How do I know when it is time to remove the sewn-in hair?
Most sewn-in hair lasts four to eight weeks. After that time, your natural hair will have grown and the braids will loosen, making the installed hair shift or feel uncomfortable. If you notice the hair moving, slipping, or causing scalp pain, it is time to remove it. Do not wait longer than eight weeks, as loose braids can cause damage to your natural hair.