A sew-in lasts 6 to 8 weeks. With disciplined washing and a stylist who braided a clean, even foundation, you can push to 10 weeks. Past 12 weeks you are no longer wearing a protective style — you are trading your edges and your new growth for a few more weeks out of one install.
But the calendar is the backup plan. Your hair will tell you first. Three stylists gave us three different numbers over five years — six to eight weeks, three months with proper cleansing, and finally the answer that actually held up: take it out when your scalp and your leave-out say so. Here are the seven signs.
How long should you keep a sew-in in?
| Time in | What's happening | Verdict |
|---|---|---|
| Weeks 1-4 | Braids tight, tracks flat, leave-out blends | Prime wear |
| Weeks 5-8 | New growth loosening the braids, more scalp care needed | The standard window — most installs come out here |
| Weeks 9-10 | Braids visibly loose, buildup, leave-out fighting you | Only with meticulous washing. Book the takedown. |
| Weeks 11-12 | Matting at the root, tension on the hairline | Overdue |
| Week 13+ | Locking, shedding, traction on the edges | Damage territory. Take it out. |
The hair itself is not the limiting factor. Quality virgin bundles will outlast several installs. What limits you is your own hair underneath — new growth pulls the braid pattern apart, and shed hair that cannot escape the braid starts to tangle at the root.
1. Your scalp has been itching for two weeks straight
Occasional itch is normal, especially with naturally dry hair. Two solid weeks of it is not. That is your scalp telling you it needs a real wash it cannot get through the install.
Scratching between the braids with the tail of a comb and patting your head makes it worse — you are irritating the scalp and loosening the braid at the same time. For relief between washes, try weave-friendly oils like peppermint and tea tree. If a week of that does not settle it, take the weave out.
2. Nothing you put on it is fixing the dryness
You have been oiling and moisturizing every few days and the hair is drier than it was a month ago. Product is sitting on top of the problem instead of reaching it. Your natural hair and scalp need a real cleanse and a deep conditioning treatment — neither of which you can do properly with tracks in the way. Take it down, treat it, and reinstall on hydrated hair.
3. There is so much buildup your hair smells
You have oiled the scalp so often that oil, sweat, and dead skin have formed a layer under the braids. Your palms come away greasy every time you touch your head, and there is a smell. That is bacteria in a warm, damp, sealed environment. No amount of dry shampoo fixes it. Take it out.
4. Your braids have lifted off your scalp
The install sits high, looks bulky, and will not lie flat. You are reaching for hats and oversized curls to disguise it. That is new growth pushing the braid pattern away from your scalp, and every day it stays in, the thread is pulling on hair that is no longer anchored. This is the sign most closely tied to hairline damage. Do not wait it out.
5. The hair is shedding in chunks
All weave sheds a little over time. Daily chunks mean the weft is failing, and no amount of sealing brings it back. You can sometimes buy a few weeks by trimming into a shorter style, but usually this is the install and the bundles telling you they are done. Start fresh with new bundles.
6. Your leave-out will not blend anymore
Your natural hair has grown, so the section you left out no longer covers the tracks the way it did on day one. Combing, flat-ironing, and rod-setting it into submission means daily heat and daily manipulation on the most exposed part of your hair — which is exactly the part you were trying to protect. When the leave-out stops cooperating, the install is over.
7. It will not hold a style at all
No curl, no flat iron, no wave, no braid. It is dry and dull, you have washed and deep-conditioned it, and nothing took. Human hair that refuses to hold a style has lost its cuticle integrity, and that does not grow back. Take it out and order a new set.
Sew-in FAQ
How long does a sew-in last?
Six to eight weeks for most people. Ten weeks is the outside limit with meticulous washing and a clean braid foundation. Past twelve weeks you risk matting at the root and traction on your hairline.
Can you leave a sew-in in for three months?
You can, but you should not. Three months is long enough for new growth to fully separate the braid from the scalp and for shed hair to lock at the root. The takedown gets painful, and the breakage happens there.
How often should you wash a sew-in?
Every one to two weeks, focusing on the scalp between the tracks with a diluted clarifying shampoo, then drying thoroughly. Damp braids under a weave are what cause the smell and the itch.
Does a sew-in damage your hair?
Not when it is installed with even tension, kept for six to eight weeks, and taken down carefully. Damage comes from three things: braids that are too tight, leaving the install in too long, and heat on the leave-out.
How long should you wait between sew-ins?
Give your hair one to two weeks between installs. Use that window to clarify, deep condition, trim any split ends, and let your scalp recover before it goes back under tension.
Can you reuse sew-in bundles?
Yes, if they are virgin or Remy human hair. Wash, condition, air dry, and store on a hanger or in a satin bag. Quality bundles commonly survive three or more installs. Non-Remy hair rarely survives one takedown.
What braid pattern should you use under a sew-in?
It depends on the install. Closures and frontals sit on a beehive; leave-out installs use straight-back cornrows with a section parted out. See the sew-in braid pattern guide for all six.
What should you do right after taking a sew-in out?
Detangle gently before shampooing, clarify to remove buildup, deep condition, and let your hair rest before the next install. Here is the full takedown routine.
Shop fresh bundles
Weaves can do wonders, but all good things come to an end. When your hair starts flagging you, listen to it — and come back with a fresh set of virgin bundles. Three bundles cover most installs, four past 20 inches.
