"Click" or Woodloc systems: there are a number of patented "click" systems that now exist. These click systems are either "unilin" or "fiboloc" A "click" floor is similar to tongue-and-groove, but instead of fitting directly into the groove, the board must be angled or "tapped" in to make the curved or barbed tongue fit into the modified groove. No adhesive is used when installing a "click" floor, making board replacement easier. This system not only exists for engineered wood floors but also engineered bamboo and a small number of solid floors (such as "parador solido click") and is designed to be used for floating installations. It is beneficial for the Do-It-Yourself market. Denver Hardwood Floors

Hardwood species used in flooring are given a hardwood hardness rating, which indicates how resistant the wood is to dents and wear. This rating is based off a test called the Janka Hardness Test, and it measures the force needed to press a steel ball into the wood sample. The highest possible score on this test is a little over 5,000, with most traditional solid wood floors scoring in the 1,000-2,000 range. The superior density of Rigid Core flooring would exceed the limitations of the Janka test, and instead a higher impact testing is needed to measure real world performance. Here is how the general hardness of plank flooring ranks: Denver Hardwood Floors

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! Hardwood Floors
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 Floors
You cannot restore every wood floor by simply refinishing it. If your wood floor has become warped or if several of the planks have become damaged, you will typically need to replace the entire floor, as finishing will only brighten an already-damaged surface. On really old floors, you may see the tongue where the boards come together, or your boards may lack adequate thickness. Floors like this are definite candidates for replacement, as refinishing is purely cosmetic. Denver Hardwood Floor Install
To fix a buckled floorboard, you need to be able to access the floor from below. The way to tackle this problem is to put weight on the buckled area from above — a cement block works well. Then install a 1 1/4-inch screw in the buckled flooring from below. Allow the screw to penetrate only halfway into the flooring, or it may come up through the finished surface. Driving the screw through the subfloor and into the flooring pulls the flooring down against the subfloor and gets rid of the buckled spot. Hardwood Floors