Getting 5–10 years out of an office carpet takes two separate tracks: daily vacuuming, and deep cleaning on a quarterly or annual cycle.
Set the two against traffic levels and carpet life extends by 30–50%, with indoor air quality improving alongside it.
How often does it need cleaning?
Carpet usually carries a manufacturer warranty of 5–10 years. To use that term in full, the space is not cleaned at one frequency throughout — it is divided by traffic and treated accordingly.
Zones are divided into three by traffic level: Red (high-traffic) · Yellow (medium-traffic) · Green (low-traffic). Marked in these colours on the circulation map, the facilities team can read the frequency straight off the drawing.
Cleaning frequency by traffic zone
◆ = recommended standard frequency. Source: CRI / EKO commercial cleaning guidelines.
| 기준 | Red · 강보행 | Yellow · 중보행 | Green · 약보행 |
|---|---|---|---|
| Typical spaces | Lobby · elevator hall · main corridor | Meeting · break room · workstation | Executive office · storage · suite |
| Vacuum frequency | Daily | 2-3 ×/wk | 1-2 ×/wk |
| Spot treatment | Immediately on discovery | After daily inspection | Weekly |
| Interim (encapsulation) | Monthly | Quarterly | Semi-annual |
| Deep clean (HWE) | Monthly or quarterly | 3-4 ×/yr | Every 1-2 yr |
Running two tracks in one zone secures both daily cleanliness and periodic deep renewal. It also means you never have to close.
Daily vacuuming decides 80% of the outcome
Vacuuming is the single most cost-effective cleaning action for carpet. According to CRI field measurement data, a general commercial vacuum cleaner can remove approximately 80% of the soil on the carpet surface.
The remaining 20% penetrates deep into the pile, accelerating abrasion and degrading IAQ. It is to address this that CRI operates the Seal of Approval (SOA) / Green Label certification programme.
A carpet vacuum uses a rotating brush that lifts deep-seated soil out of the pile while suctioning it away. It pulls out more embedded soil than a standard cylinder vacuum.
Wool carpet is the exception: do not use a brush-motor vacuum. Suction-only is the standard recommendation.
An aggressive brush makes wool fibres pill and break, so the carpet looks worn. Many manufacturers write into their wool warranty that use of an aggressive beater bar voids it.
Deep cleaning — which of the four?
Vacuuming lifts surface soil daily. Deep cleaning is the scheduled track for what has worked its way into the pile, along with allergens, fine particles and stains.
The international reference for deep cleaning procedure is ANSI/IICRC S100.
The four methods compared
◆ = best on each axis. 4 methods are scenario-based, not interchangeable.
| 기준 | Hot Water Extraction | Encapsulation | Dry Powder | Spin Bonnet |
|---|---|---|---|---|
| Principle | Hot water+detergent spray, vacuum back | Crystallizing polymer encapsulates soil, vacuum | Absorbent powder, brush, vacuum | Mist+pad rotary friction |
| Dry time | 2-3 days (no foot) | 30 min – 2 hr | Immediate | 1-2 hr |
| Cleaning depth | Down to fiber base (deepest) | Mid (interim) | Mid-deep (no residue) | Surface only |
| Water use | High (mold risk) | -98 % vs HWE | Zero | Low-mid |
| Detergent residue | Small residue possible (re-soil) | Crystallized + vacuumed | Near zero | Mid-high |
| Compatible fiber | Most (loop/cut) | Most + wool OK | Most + wool OK | NOT tufted · loop only |
| Recommended use | Annual deep renewal | Monthly/quarterly interim | 24/7 facilities | Lobby touch-up (niche) |
Hot water extraction — the deepest clean, but 2–3 days off the floor
Hot water extraction (HWE) is the method ANSI/IICRC S100 recommends for commercial floors. Pressurised hot water and detergent are injected into the pile and drawn straight back out, taking embedded soil with them. Appearance recovers visibly, which is why it is the most widely used method.
There are, however, two limitations. First, if extraction is incomplete, trace soil and detergent remain in the carpet fibers, accelerating re-soiling through wicking.
Second, the area needs 2–3 days to dry and cannot be walked on. Mould grows where damp persists. So hot water extraction suits an annual renewal, with encapsulation for the maintenance in between.
Encapsulation — can be done while you stay open
Encapsulation applies a detergent carrying a crystallising polymer, spread through the pile with a rotary brush. The polymer sets around each soil particle, and the vacuum then lifts it out.
Because it uses almost no water, it works at close to twice the rate of hot water extraction. The same crew covers twice the area, which is why it is the routine choice for offices, hotels, hospitals and schools.
Dry powder — no water, so you can walk on it straight away
Dry powder is an absorbent carrier mixed with detergent. It is spread over the carpet, worked into the pile by brush, and vacuumed away. No water means no drying time and no waiting to walk on it.
It suits airport lounges, call centres, hotel lobbies and hospitals, where closing at all is the cost.
Spin bonnet — not for tufted carpet
Spin bonnet adapts the rotary pad machines originally used to polish hardwood and stone. Water and detergent are misted onto the surface and the pad lifts surface soiling by friction.
However, it is not recommended for tufted carpet. The rotary friction damages surface loops and drives soil deeper into the pile.
Durability suffers and the manufacturer warranty may be void, so outside brief gloss correction in a lobby it is rarely used commercially.
Which method fits your facility?
Standard office (open-plan)
Weekday ops + Yellow/Green dominant
24/7 facility
Airport · call center · medical · lobby
Wool carpet space
Executive · luxury meeting · hotel suite
Lobby · main corridor (Red)
High traffic + outdoor entry (soil ingress)
Mid-size building (500-3,000 m²)
Budget + consistency + outsourcing balance
What to check when you contract a cleaner
Five things to settle at contract and specification stage, whether you outsource cleaning or run an in-house team. Fixing them early keeps disputes and rework costs down.