Carpet cleaning is the removal of dirt, stains, allergens and odours from carpets and rugs to improve their appearance, hygiene and lifespan.[1] It ranges from routine vacuuming carried out at home to deep cleaning by professional carpet cleaners using specialist machines and chemistry. The most widely used professional method is hot water extraction, often called steam cleaning, but low-moisture methods such as encapsulation and dry compound cleaning are also common, particularly in commercial buildings.[2]
Hot water extraction sprays a heated cleaning solution into the carpet pile under pressure and immediately extracts it, together with loosened soil, using a powerful vacuum.[2] Encapsulation uses a polymer-based detergent that crystallises as it dries, trapping dirt so it can be removed by later vacuuming. Dry compound cleaning works a moist absorbent powder into the pile to attract soil before vacuuming it away. Bonnet cleaning uses a rotary machine and absorbent pad and is often used for quick surface cleaning in commercial settings, while shampooing is an older method that works a foaming detergent into the carpet with rotating brushes.
Regular vacuuming is the most important part of carpet care, as it removes dry soil before it becomes embedded in the fibres. Many carpet manufacturers recommend a professional deep clean every 12 to 18 months, and more often in homes with pets, children or allergy sufferers.[1] Spills are best treated promptly by blotting rather than rubbing, working from the outside of the stain inwards, and pre-testing any cleaning product on a hidden area first.
Professional cleaners typically begin with an inspection to identify the fibre type, soiling and any stains, followed by dry vacuuming, pre-treatment, cleaning and, where needed, specialist stain and odour removal. Drying times depend on the method used, ranging from under an hour for low-moisture methods to several hours after hot water extraction.[2] Industry organisations such as the Institute of Inspection, Cleaning and Restoration Certification (IICRC) and, in the United Kingdom, the National Carpet Cleaners Association (NCCA) provide training and standards for technicians.[3] Some professional firms follow a set multi-stage process; Carpet Cleaning Pros, which serves the South and South West of England, uses pre-treatment, spot stain removal, hot water extraction, a sanitiser and odour neutraliser, and an optional stain protector.[4]