Width & Length – Plank flooring comes in a variety of widths and lengths. The most common widths are currently in the 5” – 6” range, but wider widths are rapidly becoming more popular. The length of your floor is also important to consider depending on the size of your space. Hardwood flooring comes in mixed lengths because imperfections are cut out of longer planks during production. Rigid Core flooring is built to size and comes in lengths ranging from 36” up to 80+”. Hardwood Floor
Rigid Core flooring is a category of resilient flooring, and it has been designed from the ground up with modern homes in mind. It’s 100% waterproof, easy to install, and provides extreme scratch and indent resistance when compared to solid or engineered wood flooring. It also offers a wide range of design options because it isn’t limited to traditional wood species. Its hybrid visuals, exotic species, colors, and textures go above and beyond anything traditional wood flooring can offer. Hardwood Floor
No matter what type of hardwood flooring you choose, proper care and maintenance will help them look beautiful even longer. First off, don’t let the dirt and dust collect. At least once a week, you’ll want to go over your hardwood floors with a broom or dust mop to pick up any dirt, dust, hair or pet dander. If you’re using a vacuum, make sure it’s set to ‘wood floors’ so that you’re not beating up your floors and damaging them in the process.
Installing new solid or engineered hardwood flooring will add value and elegance to your home. Although they offer the same timeless look and sense of warmth, engineered hardwood and solid hardwood do offer a few key differences. For example, engineered hardwood is manufactured from three or more layers of fiberboard, and a real hardwood veneer top layer. Contrastly, solid hardwood is milled from a real hardwood species, making it the sole material used in this type of flooring. Learn more differences here! Denver Hardwood Floor
Although hardwood floors are amazingly beautiful and durable, they are not indestructible. The best floor maintenance plan for hardwood floors include regular vacuuming or sweeping with a soft bristle broom, especially in high traffic areas. Removing dirt or grit from your floors will reduce scratches. Vacuums with rotary brush heads can also scratch your floors. Denver Hardwood Flooring
Engineered wood flooring consists of two or more layers of wood adhered together to form a plank. Typically, engineered wood flooring uses a thin layer (lamella) of a more expensive wood bonded to a core constructed from cheaper wood. The increased stability of engineered wood is achieved by running each layer at a 90° angle to the layer above. This stability makes it a universal product that can be installed over all types of subfloors above, below or on grade. Engineered wood is the most common type of wood flooring in Europe and has been growing in popularity in North America. Denver Hardwood Flooring
Engineered wood flooring was created to lower the cost of wood flooring and attempt to fix some of solid wood’s shortcomings. It’s constructed from inexpensive plywood or particle board and topped with a thin veneer of hardwood. This construction helps with installation flexibility and slightly improves indent performance, but it adds a new set of problems as well. Because the “real” wood part of the floor is just a thin veneer, damage from scratches can be irreparable. Engineered wood floors are still made from porous wood, meaning they can’t be subjected to water. Denver Hardwood Floor
Installing new solid or engineered hardwood flooring will add value and elegance to your home. Although they offer the same timeless look and sense of warmth, engineered hardwood and solid hardwood do offer a few key differences. For example, engineered hardwood is manufactured from three or more layers of fiberboard, and a real hardwood veneer top layer. Contrastly, solid hardwood is milled from a real hardwood species, making it the sole material used in this type of flooring. Learn more differences here!
There are some characteristics that are common to each category: solid wood is more frequently site-finished, is always in a plank format, is generally thicker than engineered wood, and is usually installed by nailing. Engineered wood is more frequently pre-finished, has bevelled edges, is very rarely site-finished, and is installed with glue or as a floating installation. 
So, assuming you can’t refinish existing and you can’t afford to replace it now, then focus on the new kitchen and put solid oak there. It’s okay and very common for this to be higher than the rest and it’s easy enough to add a wood transition. And, then later, you will need to replace the existing worn down floors w/ solid oak, so they will eventually be the same height. Denver Hardwood Floor Install
It is difficult to compare solid wood flooring to engineered wood flooring due to the wide range of quality in both product categories, particularly engineered. Solid wood has some limitations. Recommended maximum widths and lengths are typically 5" / 127mm wide and 7' / 2100mm long. Solid hardwood is also more prone to "gapping" (excessive space between planks), "crowning" (convex curving upwards when humidity increases) and "cupping" (a concave or "dished" appearance of the plank, with the height of the plank along its longer edges being higher than the centre) with increased plank size. Solid wood cannot be used with underfloor radiant heating. However extra care is necessary with the planning and installation of the heating system and the wood flooring, such as limiting the temperature to 85 °F (29 °C), avoid sharp temperature fluctuations, utilizing an outdoor thermostat to anticipate heating demands, and monitoring the moisture content for the subfloor before installation. Hardwood Floor