With proper care and maintenance, hardwood floors can last for decades or even centuries. Solid hardwood and tropical wood, in particular, have the potential to be sanded and refinished multiple times, extending their lifespan. However, the longevity of hardwood floors also depends on factors such as the wood species, quality of installation, and the level of foot traffic in that area of your home.

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.

There could be several reasons why your carpet padding has adhered to the floor. Some of the most common reasons include:

• There was intentional gluing or stapling to the surface.

• The polyurethane and floor bonded over years of wear.

• Pet urine, spills, or other substances leaked through the carpet and created a sticky surface.

If the carpeting in the home has not been changed in a long time, clearing off the padding underneath could be difficult. Pet urine can wreak havoc on carpeting and the flooring underneath. If you plan to reinstall carpeting, remember to use proper cleaning techniques for removing pet urine odors to prevent future problems.

The correct method to fix bubbling carpet depends on the cause. If the bubbles are caused by moisture, drying out the carpet can help flatten it. Otherwise, a pro might need to restretch or reinstall the carpet to fix the issue.