Check the flatness of the subfloor. Use a straight piece of lumber that is between 8 and 10 feet in length to find any areas of the subfloor that aren't level. Simply lay down the plank and look for dips beneath it or raised humps. Mark any problem spots you find. Move the plank across the floor 1 way, then turn it diagonally and go across the surface again.[6] Hardwood Floors

Tongue-and-groove: One side and one end of the plank have a groove, the other side and end have a tongue (protruding wood along an edge's center). The tongue and groove fit snugly together, thus joining or aligning the planks, and are not visible once joined. Tongue-and-groove flooring can be installed by glue-down (both engineered and solid), floating (mostly engineered only), or nail-down (not recommended for most engineered). Hardwood Floors

If your floor has noticeable scratches throughout, your best option is to sand down the floor and refinish it. A complete sanding removes scratches, but beware: This only works on real wood floors, not bamboo. If you have an engineered wood floor with a real wood surface, make sure the real wood surface is more than 1mm thick—sanding usually takes at least this much wood off the surface, so a thicker layer is required for a complete sanding. Hardwood Floors

If your only goal is to brighten your floors and restore their original shine, consider refinishing them. But if you want to change some aspect of the floor itself, like the style of the wood, the direction of the planks or the consistency of the material, you will need to invest in a full replacement. Refinishing is ideal to restore existing wood, while replacement is ideal for establishing a completely new look or feel. Denver Hardwood Floors
Eliminate any problem spots to make the subfloor level. Sand minor humps down with a hand-held or orbital sander to make the subfloor level. To fill any dips or low spots, use a leveling compound (also known as floor patch). Mix up the compound according to package directions, fill in the dips, then pull your straight piece of lumber back and forth over the spot to flatten and level it with the rest of the subfloor.[7] Hardwood Floors
Hardwood floors can last a long time, but eventually they need to be replaced. Luckily, it's a pretty straightforward process! Use a circular saw to cut the old hardwood into pieces, then remove the old flooring. Prepare your subflooring so that it's clean and perfectly level. After that, choose your replacement flooring and follow the process for installing that particular type of hardwood! Denver Hardwood Flooring
Choose your replacement hardwood flooring. You don't have to replace your old floor with the exact same wood or flooring type that you just removed! You can glue your new hardwood flooring into place if you like. You can also install nail-down, floating (or locking) hardwood flooring as a replacement. The choice is up to you and what your budget allows.
Warped hardwood floors, also known as sagging, is a serious problem for any homeowner. It is often the result of serious moisture problems, and any evidence of warped hardwood floors needs to be addressed immediately. Warped hardwood floors are rarely the result of faulty hardwood or installation, but are a symptom of larger moisture problems in the home itself that need to be taken care of. Denver Hardwood Flooring

Awesome explanation! When I say heat pump to people, it's amazing how often their eyes glaze over...even though most of them have had refrigerators and air-conditioners their whole lives and have never asked themselves how they work. Same principle! Compressor and expansion valve (and the heat-holding capacity of a phase change; another confusing one for people). thanks for helping educate!
Eliminate any problem spots to make the subfloor level. Sand minor humps down with a hand-held or orbital sander to make the subfloor level. To fill any dips or low spots, use a leveling compound (also known as floor patch). Mix up the compound according to package directions, fill in the dips, then pull your straight piece of lumber back and forth over the spot to flatten and level it with the rest of the subfloor.[7] Denver Hardwood Floors
Installing a hardwood floor yourself can save you money – if you know what you’re doing. Improper preparation and installation can lead to warping and buckling, which will ruin flooring that would otherwise remain beautiful for years to come. The most important thing you can do to ensure the structural integrity of your floor is to properly prepare for the installation process. Here are various articles to help you!
A buckled floor happens when the boards warp and lift up from the subfloor that they are attached to. You’ll most likely need to call in a hardwood floor installer to identify the root of the problem if buckling is an issue. Once the cause of your buckling has been identified, you’ll need to take the necessary measures to ensure that your hardwood planks are firmly attached to the subfloor so that the problem no longer persists. Hardwood Floors
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