When to Retwist Your Locs: The Real Math

Half the clients who message me asking “is it time for a retwist” are too early. The other half waited so long that the appointment is going to take twice as long and cost more. Both are avoidable. This article gives you the actual math.

The 4 to 8 week window, and why it is a window

The honest answer to “how often should I retwist” is: every 4 to 8 weeks. That range is not vagueness. It is the truth that retwist cadence depends on three variables, and if I quote a single number I will be wrong for most of you.

The three variables are:

1. New growth rate. Most adult hair grows about 1.25 cm per month. Some clients grow 2 cm. Some 1 cm. Your retwist clock starts when there is roughly 1.5 to 2 cm of new growth at the root.
2. Hair density. Dense hair shows new growth more obviously and visually “demands” a retwist sooner. Fine hair can carry 6 to 8 weeks of growth without looking unkempt.
3. Method. Palm-rolled retwists hold for 3 to 5 weeks. Interlocked retwists hold 6 to 10 weeks. Sister locs sit at 6 to 8.

Plug yourself in. If you have dense palm-rolled locs, you are on a 4 to 5 week clock. If you have interlocked medium-density locs, you are on a 7 to 8 week clock. Your real schedule lives somewhere in that range.

Signs you are due for a retwist

You do not need to count weeks. Your hair will tell you.

• The root is fuzzy enough that you can see the loc shape disappearing into the scalp.
• Parting lines are blurring into each other.
• The locs feel “loose” when you grip them at the base.
• Twists from the last appointment have started to undo themselves at the root.

If three of those four are true, book your retwist.

Signs you should NOT retwist yet

This is the part most articles skip. Retwisting too often is one of the leading causes of thinning at the parting line. Do not retwist if:

• You retwisted within the last 3 weeks.
• The roots are flat and smooth and you are only booking because you saw an Instagram post that scared you.
• You have a sensitive scalp flare-up. Wait for the scalp to settle, treat it with scalp serum, and then come in.
• You are about to fly. Retwisting and immediately wearing a scarf for 14 hours can dent the new pattern.

If you are early, your scalp will thank you and so will your edges.

What “too long” looks like

Going past 10 weeks on palm-rolled locs is not catastrophic, but it is where two specific problems start.

Marriage. Locs that should be separate start to fuse at the root. We can separate marriages during a normal retwist appointment, but each one adds 3 to 8 minutes. A head with 25 marriages adds an hour and adds to your bill.

Loose hairs woven the wrong way. Three months of new growth without retwisting means new hairs have wrapped themselves around the loc in the wrong direction. Some need to be tucked back in, some need to be cut. Either way, more chair time.

If you have been off the schedule for 3 months or more, do not retwist at home as a panic move. Just book the appointment and we will sort it.

What a Sinachi retwist actually involves

A standard retwist appointment is 90 to 150 minutes for medium-density traditional locs. The session includes:

• A clarifying wash (we do not retwist over dirty roots; the twist will not hold).
• Drying time, partial or full depending on weather.
• Re-parting only where needed (we do not redraw your whole grid every visit).
• Palm-rolling or interlocking new growth, your method.
• Sealing with sealing oil.
• A 5 minute scalp check to flag any issues early.

If you have not been in for 10+ weeks, factor an extra 30 to 45 minutes for marriage separation and clean-up.

Stretching the cadence safely

Some clients want to stretch retwists from 5 weeks to 8 weeks for budget or schedule. That is fine, with three rules:

1. Wash and air-dry weekly so buildup does not collect at the root.
2. Use sealing oil on the scalp three times a week to keep the new growth pliable.
3. Tie down your roots at night with a satin scarf so the new growth does not coil in random directions.

Done well, you can hold 7 to 8 weeks comfortably. Done poorly, the next retwist takes longer and you have not actually saved anything.

When to skip the retwist and book detox instead

If your roots feel waxy, your locs smell sour after washing, or you can see white residue when you press a loc near the scalp, you need a loc detox before your next retwist. Retwisting over heavy buildup just locks the buildup in deeper.

Detox once a year is a normal preventative. If you are seeing buildup at month four after a detox, your wash routine needs adjusting, not another detox.

Book the right appointment

If you are 4 to 8 weeks out from your last visit and your scalp feels normal, book a retwist and grooming session. If it has been longer than 12 weeks, message us first so we can hold a longer slot for you. If your scalp is not happy, start with a consultation.