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Machine Weft Application, Removal & Maintenance

Machine Weft Application

The application of a weft is Commonly known as a weave. These extensions usually last up to three months, and it takes several hours to do the whole head. Wefts of hair extensions are sewn onto your naturally braided cornrows with a needle.

Making Preparations to install a weave

The first step in learning how to sew a weave is creating a foundation to attach the extensions weft to. Next, sew wefts of hair extensions onto the base of cornrows to create length, texture, and style.

Know how you want the finished style to fall before you start parting the sections for the base.

  • Do you want a part?
  • Will you be wearing your hair up?
  • Do you want to be able to wear your hair in different styles?

All of this will help you decide how to section the hair.


Decide what kind and quality of extension extensions you want.

  • Human hair is the most popular type of extensions; it’s easy to look after and essentially undetectable when properly install. F Human hair you decide to use will play a big roll as to how your hair will look.  When you choose to get extensions, you are not just buying hair, you are making an investment, and therefore you would want to take care of it as if it was your own.
  • You can use straightening irons and curl irons or tongs on human hair and even dye it if you’d like, but not recommend it.


Choose a color. Unless you intentionally want extensions in a fun color such as pink, blue or purple, choose a color that most closely matches your hair color. If you can’t decide between two shades, go with the lighter one.

  • It can be difficult to find an exact match for your color, so if you’re buying human hair, think about bringing it to your stylist to have it dyed to match your hair color.


Calculate how much hair you need. The amount of hair you’ll need depends on the thickness of your hair and how much length and fullness you want to add.

  • If adding fullness only and your hair is similar to the length of the extensions, purchase two to four ounces of hair.
  • If your hair is much shorter than the length of the extensions you want, you’ll need about six to eight ounces of hair to get a full, natural look.
  • As a general guideline, the longer the length of the extension, the more hair you’ll need for a full look.


Consider how you’ll wear your hair. Think about hairstyles and decide how you want your hair to fall after you have the extensions in place. This is important, as the way the hair is parted and how the extensions are placed dictates how the hairstyle will fall when it is finished.


Wash and condition the hair. Dry your hair thoroughly with a blow dryer and comb through it to ensure there are no knots or snarls.


Create a part for the extension. Part your hair at the point(s) on the head where you want to add the extension. For example, if you’re sewing in an extension to add length, create a part that goes from temple to temple and one that goes from the top of the left ear and across the head to the top of the right ear.

  • Try to get the line as even as you can. Once you do, comb up the hair above the part line and clip it into place.
  • Part the hair again just a tiny bit underneath your first part. You want to create a fragile “line” of hair that you’ll use to make your cornrow. Take the hair below your cornrow part and secure it with a ponytail holder.
    • The cornrow braid will serve as the “anchor” on which the extension will be sewn.

Creating the Cornrow


Start at one side of the head. Do not start all the way at the end if the person plans to wear her hair up or in a ponytail; otherwise, the extensions will show. Begin about12 inch (1.3 cm) in.


Grab three small, fairly equal size amounts of hair from the thin section of hair you’ve reserved for the cornrow. Hold one in your right hand, one in your left and hold the center strand of hair in whatever hand feels comfortable.

  • Do not start with too much hair. Keep the strand sections small so that the finished braid isn’t bulky and doesn’t create a “bump” under the extensions.
  • If the cornrow is too thick, the hair could have trouble drying completely when you wash it and could become moldy.


Begin by crossing the hair in your right hand underneath the hair in your center section. Then pass the hair in your left hand underneath the hair that’s now in the center.

  • Repeat this criss-cross pattern along the part line of the hair. As you move, pick up new hair from the head and add it to the center section so that you’re creating one, continuous cornrow braid.
    • You can either add hair to the center section or the left- and right-hand sections as you braid. Just be consistent.
    • Make your cornrow as tight as you can without causing pain.


Secure the ends. When you’ve reached the end of your part, and you’ve used all the sectioned hair to create your cornrow, ensure the end of the cornrow braid with a hair elastic or rubber band.

Sewing the Hair


Thread your needle. Cut a piece of extension thread about 48 inches (121.9 cm) long and thread one end through the eye of a curved needle. Pull the thread through until there is an equal amount on both sides. You’re going to be working with a double thread. Tie the two loose ends together with a secure knot.


Secure the weft together. A single hair extension is also known as a weft. If you want to create extra fullness, just fold your weft in half. Take your needle and insert it through the unfolded edge of the weft so that it’s held together along the unfolded size.


Make the first stitch. With the weft now attached to your needle and thread, insert your needle underneath the cornrow and bring it up. The curved needle should make this easy, and the point of the needle should now be pointing back at you.


Attach the extension. Take the needle (the end is facing you) and insert it into the front of the extension right below the seam, which is called the track. If you’re working with a folded weft, be sure your needle goes under both tracks. Hold the hair extension up and try to cover the cornrow with it. Insert the needle back under the cornrow and pull the thread gently, leaving a loop.

  • If your cornrow extended beyond your part, just fold it back onto the head as you attach the extension.


Make a knot. Once you bring your needle and thread up from behind your cornrow, insert the needle through the loop you left at the end of your last stitch and pull the thread through. Pull firmly to attach the extension in place securely.


Continue sewing. Insert the needle back underneath the track of your extension about a 12 inch (1.3 cm) away from your last stitch. Slide the needle under the cornrow, leave a loop and bring the needle and thread through the loop to secure your extension. Continue sewing your hair extension along the part line keeping your stitches neat and a uniform 1/2-inch distance apart.


End the row. When you’re one stitch away from the end of your extension, insert the needle through the front of the extension and tack the two folded ends to one another. Do not go under the cornrow again. Make two or three stitches to fold the folded end onto itself. Then insert your needle through one of the stitches, pull through to create a loop and insert your needle through the loop to make a knot. Knot the end two or three times for extra security. Trim the edges of the leftover thread on both ends of the hair extension.


Cut if necessary. Depending on how you wear your hair, you may need to get a hair cut to create a new hair style or to help your extensions blend even more seamlessly into your hair. Enjoy!

Removal of your wefts.

Separate and find the thread

With sew-in extensions, your natural hair is braided to the scalp, and your extensions are sewn in with thread through the braid.

Start by dividing your hair into the sections that the rows were sewn in, separate the first row starting at the nape of your neck and tie the rest of your hair into a ponytail. Take scissors, and more importantly, take your time, and carefully cut the thread in the braid from the row you’ve sectioned off. Be careful not to cut your hair, and gently pull the extension away from your hair.

Comb, shampoo, and condition

Once you’ve continued the above steps and carefully removed all of the extensions, thoroughly comb or brush your hair. It is easiest to comb each row out as you remove the extension to avoid tangling your hair with hair that has naturally shed underneath. Finally, shampoo and use a deep conditioner to nourish and moisturize your hair.

Give your hair time to heal

It’s important to let your hair breathe once you have removed your weft extensions. Give your natural hair a few weeks to be styled without a weave. This will help your hair remain healthy, strong and maintained until your next Fabulous style.