No, it works best under synthetic carpets in high-traffic or moisture-prone areas. Avoid using moisture barrier padding under natural fiber carpets like wool, which need air circulation. The barrier can trap the moisture against natural fibers and cause problems. Also, you can skip it in low-risk areas like upstairs guest bedrooms, where the extra protection often isn't worth the added cost.

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.

You may get better coverage painting your baseboards if you do so before carpet is installed. The best course of action may be to attempt to paint them between having the old floor removed and the new floor laid, though this will render the room unusable for a period of time and may make the entire project a bit slower overall.

A 65-oz. carpet is good, and in many cases, it indicates a premium carpet. Most carpets for homes should fall in the range of 40 to 60 ounces for face weight. If a carpet has a 65-oz. face weight, it is likely more durable and long-lasting than a similar carpet with a lower face weight. Carpet face weight is just one factor in determining a carpet’s quality.