Whether you install flooring before or after kitchen cabinets depends primarily on the type of flooring you are using. For materials like hardwood, tile, and sheet flooring, the best practice is to install the flooring first. This ensures the cabinets are installed at the correct height and on a stable surface. However, you should not install cabinets on top of floating floors, such as laminate or luxury vinyl plank (LVP). These types of flooring need room to expand and contract with temperature and humidity changes. Placing heavy cabinets on top can restrict this movement, potentially causing the floor to buckle and making the cabinets unstable. For floating floors, install the cabinets first and then lay the flooring up to them. Other reasons to consider installing cabinets before the flooring include saving money on materials (since you won't need flooring under the cabinets) and avoiding potential damage to your new floor during cabinet installation. Additionally, installing cabinets directly on the subfloor might prevent voiding your flooring's warranty.

Dry rot or severe water damage may warrant a replacement, but you don’t always need to replace damaged subflooring. If your subfloor has warped because it was installed incorrectly, you can sometimes shim the panels (in other words, add a thin, wedge-shaped piece of wood to level the surface). If your subfloor bows upward, you may be able to sand it down at the joist so it’s level, depending on the extent of the damage.

Uneven floors often signal structural issues in a home, so taking them seriously is vital. If you buy an older home with slightly uneven floors, check that your inspector thoroughly inspects the foundation to catch any potential issues early. And if you notice that your floors are becoming more uneven over time, call a pro to check your foundation ASAP.

Most DIYers can learn how to remove carpet although it’s time and labor-intensive. However, if you have glued-down carpet and are concerned about damaging the substrate below, it's best to call a professional carpet remover. Also, removing glue-down carpet is more work than dealing with wall-to-wall carpet because you have to get rid of all traces of the adhesive from your subfloor to prepare it for a new installation.