Carpet Shampooing vs Hot Water Extraction: Which Is Better?
If you have had your carpets cleaned before, there is a good chance it was a shampoo. For years it was the standard way to clean carpets. Most professional carpet cleaners now use hot water extraction instead. Here is the difference, and why it matters for your carpets.
What carpet shampooing is
A shampoo machine works a foamy detergent into the carpet with a spinning brush. The foam holds the dirt and the carpet is left to dry. Some of the dirty foam is vacuumed up afterwards, but a lot of it stays in the pile.
That is the weak point. Soap left in a carpet stays slightly sticky, and sticky fibres grab dirt from every pair of feet that walks over them. A shampooed carpet can look great on the day and grubby again a few weeks later.
What hot water extraction is
Hot water extraction is a rinse. A cleaning solution goes on first and is brushed in to loosen the dirt. Then a hot rinse is sprayed into the carpet and pulled straight back out by a powerful vacuum, taking the dirt and the cleaning solution with it.
That is how we clean most carpets. Before the rinse we vacuum out the dry grit and give each stain its own treatment. After it we comb the pile back into place and use fans or fresh air to help it dry.
Which gives a deeper clean?
Extraction, in most cases. The rinse reaches the base of the pile and carries the dirt out of the carpet, instead of leaving it sitting in the foam. It helps with smells too, because whatever is causing them is rinsed out rather than covered up.
Which dries better?
People often expect a rinse to leave a carpet soaking. Done properly it does not, because the vacuum pulls most of the water straight back out. Carpets are usually dry within a few hours, depending on the carpet, the weather and how well the room is aired.
A shampoo can leave more moisture behind than you might think, especially from a hire machine without much suction. A carpet that stays damp for a long time can start to smell musty.
Which keeps the carpet clean for longer?
This is the biggest difference. Extraction rinses the soap out, so there is nothing left in the carpet to attract dirt. If your carpets have got dirty again quickly after a clean in the past, leftover soap is the usual reason.
Is one safer for children and pets?
Both are only as safe as the products used. Ours are pet and child safe, most of them non toxic and many 99% natural, and we do not use harsh chemicals unless a job really needs them. With extraction the cleaning solution is rinsed back out, so less of it stays in the carpet where children play and pets lie. Keep pets off until the carpet is dry, then the room can be used as normal.
When neither is right
Some carpets and rugs should not be wet cleaned at all. Natural fibres such as sisal, jute and seagrass shrink and turn brown with too much water, so we dry clean them with a low moisture powder that is worked in and then vacuumed out. The same low moisture method suits businesses that need carpets back in use quickly.
The right method depends on the carpet in front of you, which is why we check what it is made of before anything gets wet.
The short answer
For most carpets in most homes, hot water extraction gives a deeper clean, dries well and stays cleaner for longer than a shampoo. Have a look at how we clean carpets in Glasgow, or send us a photo on WhatsApp if you are not sure what your carpet is made of.
