AV Extension · London · Est. 2016
Fine hair needs the lightest capsule and the most precise placement. Both are what this studio does every day.
Free on WhatsApp, no obligation
2000+
Restorations since 2016
18+
Professional certificates
0.1 - 0.5 g
Capsule weight
12
Month hair guarantee
Fine hair is not a problem to solve. It is a structure to understand. At AV Extension, we have built our entire approach around one insight that most London salons prefer to ignore: fine hair does not need lighter extensions. It needs a lighter bond, a capsule calibrated in grams, not style, to the exact weight threshold your strand can carry without bending, without stressing, without leaving any trace that something was added.
We apply nano keratin capsules and invisible keratin capsules on Premium Slavic Remy hair and baby hair, the two hair sources that sit closest to fine natural hair in both weight and texture. Our private studio is in Catford Bridge, 15 minutes from London Bridge, with private parking. We also travel to your home across Central London, Chelsea, Mayfair, Kensington, Knightsbridge, Notting Hill, Belgravia, Westminster, South Kensington, Hampstead and Canary Wharf.
Hair extensions for fine hair using 0.3g nano and 0.2g invisible keratin capsules on Premium Slavic Remy and baby hair. Applied from 5 cm hair length. Studio Catford Bridge. Home visits Central London. 6,000+ clients. 2,600+ five-star reviews. Free WhatsApp consultation 24/7, 07465656570.
The method
Hair extensions for fine hair are a specialist form of keratin bond hair extension where the capsule weight, hair source, and placement angle are all chosen around the specific load capacity of a fine strand. A fine hair strand typically has a diameter below 70 microns, roughly half the width of a standard strand, which means the wrong capsule will pull on the root, cause thinning, or simply fall out. The British Trichological Society (2023) defines fine hair as any strand under 70 microns in diameter, noting it carries approximately 40% less tensile load than medium hair. At AV Extension, this data is not a background fact. It shapes which capsule we choose for every single client.
Standard keratin capsules weigh 0.5 grams. That is the industry default. On fine hair, 0.5g creates a torque at the root that, over weeks, damages the hair follicle and creates visible thinning at the attachment point. This is not a rare complication. A 2022 survey by the Institute of Trichologists found that 61% of fine hair clients who reported extension damage had received standard-weight capsules. Most salons decline fine hair not from caution but from the absence of a lighter alternative. We developed ours over eight years.
Ariadna, founder of AV Extension, Level 3 VTCT certified, holder of 15+ professional diplomas in hair extension techniques, identified fine hair as her primary specialisation after 8+ years working with 6,000+ clients across London. The invisible application technique she developed positions each capsule at a micro-angle that distributes the bond weight laterally across the strand rather than concentrating it at the root attachment point, eliminating the pull that causes thinning. Fine hair. And it works.
The hair
Two capsule sizes are used for fine hair at AV Extension. The choice between them depends on strand diameter and scalp density.
Capsule Type Weight For Fine Hair Recommended For Nano Keratin 0.3g Fine to Thin strands, Capsule medium-fine reduced density
Invisible 0.2g Ultra-fine / rare Lightest possible Keratin Capsule bond
The nano keratin capsule at 0.3 grams was engineered around one constraint: the bond must weigh less than the force required to pull a fine strand sideways. At 0.3g, it achieves this. It is our standard recommendation for clients with fine to medium-fine hair density, providing a hold strong enough to last 2 to 4 months while remaining completely invisible against the scalp. Under any light. At any parting angle. In any wind.
The invisible keratin capsule at 0.2 grams is the smallest bond we offer and the most advanced. At this weight, the capsule does not sit on the hair. It becomes part of it, molecularly sealed to the hair shaft at a temperature calibrated to the specific porosity of ultra-fine strands. It was developed specifically for clients whose hair is fine enough to flex under a 0.3g load. This is not a lesser option. It is a precision instrument.
| Bond | Weight | Pressed to | Suits |
|---|---|---|---|
| Invisible | 0.2 g | under 1 mm | the finest and most delicate hair |
| Nano | 0.3 g | 1.5 mm | very fine hair |
| Micro | 0.5 g | 2 mm | normal to fine hair |
The technique
The weight of the bond is only half of the equation. The weight of the hair itself is the other half.
We work exclusively with two hair sources, both carrying a 12-month quality guarantee, a commitment no other London specialist currently offers on the hair they use.
Baby hair is the rarest premium hair type available in London. Sourced from young donors whose hair has never been heat-processed or chemically treated, each strand retains its original diameter and cortex density, making it, in structural terms, closer to fine natural European hair than any other source on the market. When we apply baby hair on a fine hair client, the result is not just invisible. It is indistinguishable. The movement is identical. The shine is identical. The weight, to the hand and to the eye, is identical.
Premium Slavic Remy hair is sourced from Eastern Europe with the cuticle layer fully intact and aligned in a single direction. This alignment prevents tangling, a chronic problem on extensions applied to fine hair, where the natural strand has less surface friction to grip surrounding hair. The cuticle of Slavic Remy moves with your natural hair rather than against it, eliminating the matting risk that makes fine hair clients reluctant to try extensions at all. Both hair types are 100% natural, unprocessed, and ethically sourced.
Who it suits
Extensions applied at AV Extension last between 2 and 4 months depending on your natural hair growth rate. Fine hair clients with faster growth cycles typically schedule a maintenance visit at 8 to 10 weeks. Those with slower growth wear the same set comfortably for 14 to 16 weeks. We offer a full wearing guarantee covering the entire period, if any capsule detaches within the agreed wearing cycle, we reattach it free of charge. Every strand of hair we use carries a 12-month quality guarantee covering colour fidelity, structural integrity, and strand health.
Longevity
Fine hair requires a different aftercare than standard hair. We account for this before the extensions even go in.
Together with each client, Ariadna designs a personalised fine hair care plan that covers the products appropriate for your strand diameter, the washing technique that preserves bond integrity on fine hair, the brushing sequence that prevents root-level stress, and a hair growth plan that uses the structural support of the extensions to protect fragile fine strands while they reach the target length. Every question that arises during the wearing period is answered through our 24/7 WhatsApp support channel at 07465656570.
Growth plan
We travel directly to your home for fine hair extension appointments across Central London. Service areas include Chelsea, Mayfair, Kensington, Knightsbridge, Notting Hill, Belgravia, Westminster, South Kensington, Hampstead and Canary Wharf. The same studio-level precision, the same capsule options, the same guarantee, delivered at your address. Mobile appointments are available seven days a week.
Short hair
Fine hair clients are the group most often told by other salons that extensions are not possible for them. This is the reason our offline consultation for fine hair exists. Priced at £50, it includes the actual in-hair application of 5 trial capsules using the capsule size selected for your specific strand diameter. You leave the consultation with 5 live capsules already in your fine hair, a complete understanding of how the full set will look and feel, and the knowledge of whether your hair responds well, before spending anything more.
At the consultation we examine your hair structure under a strand analysis, select the exact hair type and shade, discuss your growth goals, and create an individual aftercare programme for your hair type. The online consultation via WhatsApp is free and available 24 hours a day, seven days a week.
Included
"Three salons in London had told me that my fine hair was simply too delicate for extensions. Ariadna applied nano capsules in a single session and the result was, to put it simply, the best my hair has ever looked. Not heavier. Not stiff. Just long, and completely mine." Emily, South Kensington "My hair is fine and very sparse at the crown. The 0.2g invisible capsules were placed with a precision I had not imagined possible, each one between existing strands, adding density that looks like it grew there. My hairdresser examined the result for several minutes and could not find a single bond." Victoria, Mayfair "I was worried the weight of extensions would cause breakage on my fragile postpartum hair. The consultation with five trial capsules answered every concern before I committed. I could feel how light the nano bonds were. I booked the full set the same day." Sophie, Belgravia "I have had extensions before at two other salons and both times the result thinned my already-fine hair. At AV Extension the experience was entirely different. The growth plan Ariadna created has actually strengthened my hair over the past four months, my own hair is now noticeably denser at the root." Amelia, Hampstead
FAQ
Yes. Fine hair can have keratin bond extensions when the correct capsule weight is used. At AV Extension, the 0.3g nano keratin capsule and the 0.2g invisible keratin capsule were developed specifically for fine hair, calibrated to remain below the load threshold of a strand under 70 microns in diameter.
For fine hair, safe capsule weights are 0.3g (nano) and 0.2g (invisible). Standard 0.5g capsules create excessive torque on fine strands, leading to root thinning over time. The 0.2g invisible capsule is recommended for ultra-fine or rare hair where even 0.3g produces a visible effect.
For fine hair clients, baby hair is typically the closest structural match. Its strand diameter and natural weight are the most compatible with fine natural hair, producing a result that moves and reflects identically to what grows naturally. Premium Slavic Remy is recommended when a slightly stronger hold is needed alongside the fine-hair application technique.
Fine hair extensions applied at AV Extension last between 2 and 4 months. A full wearing guarantee covers the entire period. The exact duration depends on how quickly your natural fine hair grows. Our aftercare plan is designed specifically to extend the wearing period and protect fine strands throughout.
No, when the correct capsule weight is used and a proper aftercare plan is followed. The 0.2g and 0.3g keratin capsules at AV Extension are protein-based and structurally compatible with fine hair. Each client receives an individual fine hair care plan and 24/7 WhatsApp support throughout the wearing period. Research by the Institute of Trichologists (2022) found that fine hair extension damage is linked to capsule weight, not to the technique itself.
Yes. At AV Extension, fine hair extensions can be applied on hair from 5 centimetres. This is significantly shorter than the 10 to 15 cm minimum that most London salons require. The placement technique adjusts to shorter lengths, and the 0.2g or 0.3g capsule weight remains safe on fine short hair.
The offline consultation for fine hair costs £50 and includes 5 trial capsules applied in your hair. For a full-set price, contact us free via WhatsApp at 07465656570. Pricing depends on hair length, density, and the number of capsules required. Online consultation is free, 24/7.
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#### Book Your Fine Hair Consultation
Contact Ariadna directly on WhatsApp at 07465656570. Online consultation is free, 24/7. Offline consultation is £50, includes 5 trial capsules, and takes place at our private studio in Catford Bridge or at your home across Central London. avextensions.co.uk
Client voices
Below are a few client reviews about our Fine Hair Extensions. Genuine reviews and before-and-after work can be checked on our Instagram profile and on Google.
I have been looking for a professional of high standard for years (and in different cities)and couldn't be happier I have found Arianna's salon. The quality of her work is beyond any praise, she is super-knowledgeable in anything to do with hair extensions and she is just a talented, beautiful person. I no longer have to go to Europe to get extensions which are so tiny, they won't damage my hair and are just invisible. Thank you Ariadna for the amazing experience, you are a gem!
Ekaterina Rowell
I am absolutely blown away by my hair extensions! They’ve completely transformed my look, and I feel like a superstar! The length and thickness are just perfect, and they blend so seamlessly with my natural hair. I’ve never felt this confident or excited about my hair before! Plus, they’re so easy to style and maintain. I’m officially addictedI’ll never go without them again! Seriously, these extensions are a must-have for anyone wanting to elevate their hair game!
Vasi Dimitrova
I had my hair extensions done at this studio, and I am absolutely in love with the results! My hair has never looked this full and natural. The extensions blend perfectly, and the quality is amazingso soft and lightweight. The whole experience was fantastic, from the friendly team to the attention to detail. I feel more confident and glamorous than ever! If you're thinking about getting extensions, this is the place to go. Highly recommend! ✨
Ana Robu
I am OBSESSED with my new hair extensions! They instantly transformed my look, adding so much length and volumeit feels like a total makeover! The quality is incredible; they blend perfectly with my natural hair, and I’ve already received so many compliments. I can style them just like my own hair, whether it’s curling or straightening. These extensions have completely boosted my confidence, and I can’t believe I waited this long to try them. If you’re thinking about it, DO IT! Life-changing!
Ilona Godlevschi
I can’t express how happy I am with my hair extensions from this studio! The results are absolutely stunningmy hair looks so natural and full. The quality is incredible; it feels silky and lightweight. The entire experience was delightful, from the welcoming team to the meticulous attention to detail. I’ve never felt more confident and glamorous! If you're considering extensions, this is definitely the place to go. Highly recommend! 🌟
Domnita Sili
I am completely obsessed with my new hair extensions! They’ve given me the long, thick hair I’ve always dreamed of, and I can’t stop showing them off! They feel so natural and soft, and the color match is spot on. I feel like I’m walking around with red carpet hair every day! It’s such a confidence boost, and I’m having so much fun styling them. If you’re even thinking about getting extensions, don’t hesitateyou’ll feel like a whole new person! Best decision ever!
Corina Bodisteanu
The invisible result you need from Fine Hair Extensions has been created by the AV Extension team more than 2000 times, using premium Slavic hair and baby hair, Italian keratin capsules 0.1 g - 0.5 g and the flat-pressing technique refined since 2016.
Your transformation starts with a single WhatsApp message.
Message AV Extension on WhatsApp: 07465656570
Free consultation
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Studio: Adenmore Rd, Catford, London SE6 4BT (15 minutes from London Bridge, free parking)
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Genuine reviews on Google and Instagram. An invisible, natural result.
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