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Carpeting lasts between 10 and 15 years in most cases, but keep an eye out for common signs that it's time to replace it. Persistent smells despite deep cleaning, faded color, worn-down carpet padding, and general wear and tear are signs that it's time to tear it up. If you are experiencing allergy issues indoors, this could also be a sign that new flooring is the key to a fresher home.

Carpet padding costs an average of $510 to purchase and install in a 225-square-foot room. The price can range from as low as $170 to as much as $850, depending on the brand, the thickness, and the labor cost. Although carpet padding will increase the overall cost of carpet installation, it also helps the carpet hold up longer, reduces noise in the room, and provides more insulation.

Deciding whether to clean or replace your carpet depends on its condition and age. If cleaning no longer resolves issues, it's time to consider a replacement. Key signs that you need to replace your carpet include:

• Stains that are impossible to remove.

• A persistent smell that lingers even after cleaning.

• An increase in allergy symptoms.

• The age of the carpet. Most manufacturers state that carpets should last about 10 years with proper care.

When cleaning is no longer effective, you should replace the carpet with a new one or consider other flooring options like vinyl or laminate.

In most cases, you do not need to put padding or underlayment under carpet tiles. Unlike traditional carpet, which requires a separate pad, carpet tiles are designed to be installed directly onto a firm subfloor like plywood, concrete, or tile. Many carpet tiles come with a built-in underlay and attach with peel-and-stick adhesive, double-sided carpet tape, or glue. For a more comfortable, cushioned feel, especially in residential settings, you can opt for padded carpet tiles that have a thicker underlay attached. While it's generally not recommended to install a separate pad, a compact underlayment might be used in some situations, though this typically requires professional installation. An acoustic underlay may also be considered in commercial spaces or multi-level homes where noise reduction is a priority.