Carpet is the most commonly used floor covering in homes, schools and other buildings. It can be installed on almost any kind of subflooring material. Carpet should not be placed over hardwood or laminate floors because it will damage both surfaces and could even cause the wood to warp and split. The best time to purchase carpet is right after you install a new floor covering – when there are no rugs or runners underneath it – so that you can look at its condition before your carpet gets heavy traffic from people walking across it every day. Also, if you’re looking for an inexpensive way to cover old carpets, expect prices to drop as soon as they start getting worn out; sometimes those old carpets that were only $20-$30 per square foot end up costing less than half that price once people begin using them again!