Commercial carpet fails from the bottom up. Grit settles at the base of the fibers, and every footstep grinds it in like sandpaper. By the time a traffic lane looks gray, the fibers underneath have already been wearing for months.
Daily or nightly vacuuming is the foundation, especially at entrances. On top of that, a good rule of thumb is hot-water extraction every three to six months for high-traffic areas like entries, hallways, and reception, and once or twice a year for lighter-use offices and conference rooms.
Massachusetts winters change the math. Salt and ice melt tracked in from November to March leave a white, crusty residue that attracts more dirt. A deep clean in early spring removes that residue before it sets into the backing.
Schools and daycares often plan carpet extraction for summer and holiday breaks, when rooms can dry undisturbed. Offices usually prefer Friday evenings so carpet has the weekend to dry completely.
Whatever the schedule, spot-treat spills quickly and keep walk-off mats at every entrance. The less soil that reaches the carpet, the longer it lasts between deep cleans.