---
title: "How carpet shampooing works: process and preparation"
description: "Carpet shampooing step by step: vacuuming, a patch test, stain pre-treatment and extraction. What to clear away and which materials call for caution."
url: https://uklid123.cz/en/blog/jak-probiha-tepovani-koberce
language: en
updated: 2026-11-09
publisher: Úklid 1-2-3 (info@uklid123.cz, +420 608 486 486)
---

Stains and materials

# How carpet shampooing works: process, preparation and what to expect on the day

What actually happens during machine carpet shampooing, what to prepare in advance and which materials are better cleaned only on the spot.

Úklid 1-2-3 editorial team · Published 9 November 2026 · Last reviewed 9 November 2026 · 7 min read

## In short

- Shampooing is extraction: the machine sprays water with a cleaning agent into the fibres and immediately extracts it together with the dirt.
- Before shampooing, the carpet is vacuumed thoroughly, tested in a hidden spot and stains are pre-treated.
- Wool carpets tolerate warm but not hot water; sisal, coir and bast should be spot-cleaned only.
- At home, clear a free area, switch off underfloor heating and find the carpet's label or instructions.
- Do not walk on the carpet until it is completely dry, then vacuum it once more.

Carpet shampooing takes place in three main steps. First the carpet is vacuumed thoroughly, then stains are pre-treated, and finally the machine sprays water with a cleaning agent into the fibres and immediately extracts it together with the dissolved dirt. The whole process usually ends with a pass of clean water and then waiting for the carpet to dry completely. Before all of that, however, the material must be checked and the method tested in a hidden spot.

## What shampooing is and how it differs from vacuuming

A vacuum cleaner lifts loose dust and dirt from the surface. Shampooing, technically extraction, goes deeper: according to [Kärcher's guide to cleaning carpets](https://www.karcher.com/cz/karcher-radi/pece-o-domacnost-a-zahradu/pece-o-vnitrni-prostory/cisteni-kobercu.html) , water with a cleaning agent is sprayed on in a single working step and is immediately extracted again together with the dirt. In the second step, clean water is used to remove any residue of the cleaning agent.

Household machines and professional machines work on the same principle. They differ mainly in suction power, and therefore in how much water remains in the carpet. If you are still considering whether ordinary home cleaning is enough for you, read the article [how to clean a carpet at home and when it is time for shampooing](https://uklid123.cz/blog/jak-vycistit-koberec-doma) .

## The shampooing process step by step

Whether you shampoo the carpet yourself or a cleaning service comes, the order of the steps is similar:

- **Inspection and identification of the material.** The team finds out what the carpet is made of, whether it has a label with care instructions, where the stains are and how the carpet is laid (loose, or glued down over the whole surface).
- **Thorough vacuuming.** In its [instructions for using a carpet cleaner](https://www.rugdoctor.com/rent/how-to-use-a-carpet-cleaner/) , the manufacturer Rug Doctor lists thorough vacuuming of the entire area as the first step. Otherwise, dry dust and hair would turn into a muddy layer in the water.
- **Test in a hidden spot.** The effect of the cleaning should first be tried in an inconspicuous place, for example under a sofa or in a corner. You check whether the colour runs and whether the fibres change appearance.
- **Stain pre-treatment.** According to the Rug Doctor instructions, older or dark stains are sprayed in advance with a pre-treatment product, which is left to work for a while according to the label.
- **Extraction.** The machine is guided slowly in straight strips. Rug Doctor recommends two "wet" passes with the trigger pressed, followed by two "dry" passes over the same spot, when the machine only extracts.
- **Rinsing with clean water.** A second pass with clean water removes residue of the cleaning agent, which would otherwise attract dirt more quickly.
- **Drying and final vacuuming.** Kärcher points out that the carpet should dry completely before you step on it again, and recommends vacuuming thoroughly once more after it has dried.

Drying time depends on the material, the pile height, the temperature and the ventilation in the flat. According to the [Carpet and Rug Institute's frequently asked questions](https://carpet-rug.org/resources/frequently-asked-questions/) , a properly extracted carpet should not stay wet long enough to start growing mould.

## How to prepare for shampooing at home

You can do most of the preparation the evening before. The shampooing then goes faster and nothing gets dirty or wet.

- Clear small items, toys, shoes, cables and chargers from the carpet.
- Remove light furniture such as chairs, small tables, baskets or plant stands.
- Under heavy furniture that stays in place, prepare pads or pieces of foil so that the legs do not touch the damp carpet. This is a precautionary tip: wooden legs or metal glides may leave a stain on wet fibre.
- Switch off underfloor heating. Kärcher recommends this for carpeted floors so that no change of colour or material occurs during drying.
- Find the carpet's label or instructions and keep them to hand.
- Clear access to a socket and to water, for example in the bathroom, where the tanks are filled and emptied.
- Arrange where children and pets will go during the shampooing and drying.

If you would like to have upholstery cleaned during the same visit, prepare the sofa in the same way: without cushions and blankets on top. The procedure for different types of fabric is described in the article [how to clean a sofa at home](https://uklid123.cz/blog/jak-vycistit-sedacku-doma) .

## Which carpets and materials require caution

Not every carpet can withstand full machine shampooing. Kärcher's guide states that cotton and wool carpets and synthetic materials can be shampooed, whereas bast, sisal or coir fibres are better cleaned only on the spot with water and a suitable cleaning agent.

| Material | What to watch out for |
| --- | --- |
| Synthetics (polyamide, polypropylene, polyester) | Usually shampooed without problems, but the test in a hidden spot still applies. |
| Cotton | Can be shampooed; check whether the colour runs. |
| Wool | Warm water yes, hot no, because it could damage a wool carpet. For regular vacuuming, use suction only, without a rotating brush. |
| Sisal, coir, bast, jute | Spot cleaning only; soaking the whole surface is unsuitable. |
| Viscose, silk, hand-knotted and antique carpets | Follow the label and the manufacturer's instructions, or consult a carpet cleaning expert beforehand. |

The recommendation on vacuuming wool comes from the Carpet and Rug Institute's answers: for wool carpets, a vacuum cleaner with suction only, without brushes, is recommended. The temperature limit comes from Kärcher's guide, according to which warm water improves the result but must not be hot.

### How to read the label

If the carpet has a sewn-in label with care symbols, the same symbols are used as for clothing. According to the [GINETEX overview of symbols](https://www.ginetex.net/GB/labelling/care-symbols.asp) , a circle denotes professional dry or wet cleaning, and the letter inside it specifies the type of process. A crossed-out symbol means that the given method of care is not permitted. If the label is missing, look for instructions in the documents from the seller or on the manufacturer's website.

For new wall-to-wall carpets, also check the warranty terms. The [Carpet and Rug Institute](https://carpet-rug.org/carpet-and-rug-care/cleaning/) notes that some manufacturers require a particular method of professional cleaning in order to preserve the warranty.

## Cleaning agents and safety

Only a product intended for carpet shampooing, dosed according to the label, belongs in the machine. Do not add washing-up liquid or floor detergents to the tank unless the machine's instructions expressly permit it.

- Read the product label and the machine's instructions before use.
- Ventilate while working and wear gloves.
- Never mix products containing chlorine with acids or with ammonia.
- Test every new product in a hidden spot first.
- When finished, empty and rinse both tanks and remove hair from the brush, as stated in the Rug Doctor instructions.

## What to expect on the day of shampooing

When you order shampooing, expect that at the start the carpet will be inspected, the scope agreed and you will be told about stains that may not disappear completely. These are typically old stains from dyes, ink or rust, or fading caused by the sun. That is not dirt but a change in the fibre or colour.

During shampooing, a hose and cable move around the room, so it is good to have a clear path to the bathroom. When finished, the carpet is damp to the touch. You can walk on it, put furniture back and let pets in only once it is completely dry.

Úklid 1-2-3 offers upholstery shampooing as part of the [sofa shampooing](https://uklid123.cz/sluzby/tepovani-sedacek) service. You can find an overview of our other services on the [services](https://uklid123.cz/sluzby) page and indicative prices in the [price list](https://uklid123.cz/cenik) .

## How often to shampoo a carpet and what helps allergy sufferers

The Carpet and Rug Institute recommends deep cleaning carpets roughly every 12 to 18 months, using a method specified by the manufacturer. If the carpet has its own care instructions, they take precedence.

For people with dust mite allergies, shampooing is only a supplement to regular care. In its [overview of asthma triggers](https://www.epa.gov/asthma/asthma-triggers-gain-control) , the US EPA states that dust mites live, among other places, in carpets and upholstered furniture. It recommends vacuuming carpets and furniture every week, ideally with a HEPA-filter vacuum cleaner, and that a person with asthma should not be in the room while vacuuming. You can find further steps in the article [cleaning with a dust mite allergy](https://uklid123.cz/blog/uklid-pri-alergii-na-roztoce) .

## Frequently asked questions

### Do I have to vacuum the carpet myself before shampooing?

It is not necessary unless you agree otherwise with the cleaning service, but vacuuming is always the first step of shampooing. The instructions from Rug Doctor, a manufacturer of carpet cleaning machines, list thorough vacuuming of the area as preparation before applying water. If you vacuum the carpet the evening before, the shampooing will go faster. Above all, however, remove small items and light furniture from the carpet and find the carpet's label or instructions.

### Can a wool carpet be shampooed?

According to Kärcher's instructions, wool carpets can be shampooed, but the water may only be warm, not hot, otherwise the wool may be damaged. Always test the method in a hidden spot first and follow the carpet's label. For regular vacuuming of wool, the Carpet and Rug Institute recommends a vacuum cleaner with suction only, without a rotating brush. For hand-knotted or antique wool carpets, it is better to consult an expert beforehand.

### Which carpets should not be shampooed over the whole surface?

Kärcher's instructions recommend cleaning bast, sisal and coir fibres only on the spot, that is, with water and a suitable cleaning agent applied directly to the stain. Caution is also advisable with viscose, silk, hand-knotted and antique carpets. For these, the label and the manufacturer's instructions are decisive. If you are not sure, test the method in an inconspicuous spot, or skip shampooing and consult an expert.

### Will all stains disappear after shampooing?

Not always. Shampooing removes ordinary dirt and fresher stains well, especially when they are pre-treated with a pre-treatment product. However, old stains from dyes, ink or rust, and areas faded by the sun, are usually a permanent change to the fibre or colour. That is why it is a good idea to point out stains before work begins and say what caused them, so that a suitable method can be chosen.

### Why switch off underfloor heating before shampooing?

For carpeted floors, Kärcher recommends switching off underfloor heating before cleaning so that no change of colour or material occurs during drying. A damp carpet on a heated floor would dry unevenly and from underneath. Switch the heating off in advance so the floor has time to cool down. Switch it back on only once the carpet is completely dry, or according to the instructions of the carpet and floor system manufacturer.

## Sources

- [Čištění koberců hračkou – Kärcher](https://www.karcher.com/cz/karcher-radi/pece-o-domacnost-a-zahradu/pece-o-vnitrni-prostory/cisteni-kobercu.html) (checked 9 November 2026)
- [How To Use a Carpet Cleaner Rental – Rug Doctor](https://www.rugdoctor.com/rent/how-to-use-a-carpet-cleaner/) (checked 9 November 2026)
- [Frequently Asked Questions – The Carpet and Rug Institute](https://carpet-rug.org/resources/frequently-asked-questions/) (checked 9 November 2026)
- [Cleaning and Maintenance – The Carpet and Rug Institute](https://carpet-rug.org/carpet-and-rug-care/cleaning/) (checked 9 November 2026)
- [Care Symbols – GINETEX](https://www.ginetex.net/GB/labelling/care-symbols.asp) (checked 9 November 2026)
- [Asthma Triggers: Gain Control – US EPA](https://www.epa.gov/asthma/asthma-triggers-gain-control) (checked 9 November 2026)

Prepared by the Úklid 1-2-3 editorial team with the help of AI and verified against the sources listed. Manufacturers' instructions and regulations change: always follow the current wording of the source and the product label. This article is general information, not professional or legal advice. This article was translated from Czech with the help of AI. The sources are in the original language.

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