The most expensive clip in hair extensions methods is the strand-by-strand hair extension technique. This technique happens to be more expensive than others because of the time involved in getting the hair extensions uk applied. The hair stylist must attach the extension one strand at a time. Strands usually contain 20-50 hairs a piece, so you can imagine how time clip in hair extensions this would for a full head of hair and time is money. Using hair wefts is a much faster process because you are applying a lot more hair with each weft than if you went hair extensions. The amount of hair being applied is also a remy human hair extensions factor in the cost of getting extensions. A partial head of hair is cheaper than a full head of hair. When considering extensions, you should also factor in the cost for maintenance. This would be human hair extensions and touch-ups about every 6-8 weeks.