Cleaning and New pads: how often?

We operate our own cleaning and repair facility.    Our expert staff are well versed in cleaning area rugs.    Whether a cherished antique or more recent acquisition, we offer the most experienced facility in the Northwest.     A general rule is to clean a carpet every 3-5 years; at that time it is also recommended that the padding be replaced.    A less trafficed living or dining room may go up to 7 years.    It is not a benefit to delay past that as dirt will permeate the pile and can abrasively wear the pile.