How to Use a Round Brush to Add Volume at the Roots

Flat, lifeless roots can make even the healthiest hair look dull. While many styling tools promise instant lift, the classic round brush remains the most reliable way to build volume from the root. When used correctly, a radial brush lifts the hair away from the scalp while directing airflow to the root area, creating natural, long-lasting body.

In this guide, we'll break down the exact technique for using a round brush to add volume at the roots. You'll learn how to choose the right brush size, prep your hair, and master the blow-dry motion that gives you that salon-worthy lift at home.

Why a Round Brush Is the Key to Root Volume

A round brush, also known as a radial brush, works by wrapping sections of hair around its barrel. This creates tension and allows the bristles to grip the hair firmly. As you direct heat from a blow dryer onto the wrapped section, the hair is lifted away from the scalp, encouraging the roots to stand up rather than lie flat.

The size of the brush barrel matters. Larger barrels (around 2 to 3 inches) are ideal for adding gentle volume and smoothing longer hair, while smaller barrels (1 to 1.5 inches) provide more lift and are better for shorter styles or precise root work. For most people, a medium-sized radial brush offers a good balance.

• Choose a brush with a ceramic or tourmaline barrel for even heat distribution and faster styling.
• For fine hair, opt for a brush with a smaller barrel to avoid overstretching the hair.
• For thick hair, a larger barrel helps create volume without excessive heat exposure.

Prepping Your Hair for Maximum Lift

Start with clean, slightly damp hair. Towel-dry until it's about 70% dry. Apply a lightweight volumizing mousse or root-lifting spray to the roots, focusing on the crown area. Avoid heavy products that can weigh hair down.

Detangle your hair thoroughly with a wide-tooth comb or a detangling brush to prevent snagging. Then, section your hair into manageable parts—usually four sections: top, sides, and back. Clip the sections you're not working on to keep them out of the way.

• Use clips that won't leave kinks in the hair, such as duckbill clips.
• Work with smaller sections (about 1-2 inches wide) for better root control.
• Don't forget to apply a heat protectant spray to shield your hair from damage.

The Step-by-Step Blow-Dry Technique for Root Volume

Take a section of hair from the crown area. Place the round brush underneath the section, close to the roots. The bristles should grip the hair, and the brush should be positioned so that the hair is lifted upward and away from the scalp. This is the critical angle for creating volume.

Turn on your blow dryer set to medium heat and medium speed. Aim the airflow at the roots, directly onto the brush. While the hair is wrapped around the brush, gently pull the brush upward and away from the head, rolling it slightly to keep tension. Hold for a few seconds to let the heat set the lift.

Slowly roll the brush down the section, continuing to direct heat along the hair shaft. Once you reach the ends, roll the brush under to create a slight bend or curl, if desired. Repeat this process on each section, working from the back to the front for the most natural result.

• For extra lift at the roots, hold the brush in place for 5-10 seconds with the heat on, then cool the section with the cool shot button to set the volume.
• If your hair is stubborn, you can backcomb the roots lightly before blow-drying, but be gentle to avoid damage.
• Finish with a light-hold hairspray to maintain the volume throughout the day.

Choosing the Right Kent Radial Brush for Your Hair

Kent Brushes offers a variety of radial brushes to suit different hair types and styling needs. For those with thick or coarse hair, the 18 Row Nylon/Black Bristle Radial - KS15B provides a firm grip and effective tension, helping to smooth and lift even the most stubborn strands.

If you prefer vegan-friendly tools, the Curve Vegan-Friendly Flexi Pin Hairbrush - KC1 is a flexible option that works well for root volume without using animal bristles. Its flexible pins glide through hair easily, reducing breakage while still offering lift.

For a classic choice, the Tortoiseshell Effect MiniHog Hairbrush - KB MINIHOG T combines boar bristles with a smaller barrel, perfect for precise root work on shorter hair or for adding volume to fine hair.

Common Mistakes to Avoid for Root Volume

One of the most common mistakes is using a round brush on completely dry hair. This can cause friction and breakage. Always start with damp hair and use a heat protectant.

Another mistake is holding the blow dryer too close to the hair or using too high heat, which can damage the hair cuticle and lead to frizz. Keep the dryer at least a few inches away and use a medium heat setting.

Finally, don't rush the process. Each section needs adequate time to dry and set. If you move too quickly, the volume won't last. Take your time and work methodically through each section.

• Avoid using a round brush on wet hair; it should be damp, not dripping.
• Don't wrap too much hair around the brush—smaller sections give better lift.
• Always use the cool shot at the end to lock in the style.

Mastering the round brush technique will transform your styling routine, giving you the root volume you've always wanted. With the right brush and a little practice, you can achieve a professional blowout at home. Explore the Kent radial brush collection to find the perfect tool for your hair type and start creating beautiful, voluminous styles today.