My advice is to bring in a professional to make sure the floors can be refinished (i.e. if there is still enough room/if you didn’t permanently damage the wood), and if so, have them refinish them rather than replace them – that will be much less expensive. I don’t know where you live and the going rates, but in our area, it’s prob. the price is prob. $1-2 lower…but that may be par for your area. Call in 2-3 people to see. I would check Angie’s List (angieslist.com) for some good local people in your area. Denver Hardwood Floor Install
Glue down engineered hardwood, alternatively. If you don't want to nail down the boards, you do have the option of using adhesive to put engineered hardwood in place. It's a good choice, but won't last as long or be as sturdy as nailed down hardwood. The procedure is very similar to the nail-down process. Follow the adhesive manufacturer's instructions for installation and drying times.[11]
No matter which type of flooring you choose, if the subfloor, joists or other structural elements need work, you can expect to pay considerably more in both labor and materials. Plywood for the subflooring averages $22 for each 4-foot by 8-foot sheet. For a 12-foot by 12-foot room, you’d need five sheets of plywood, which increases the cost by $110. Additionally, carpenters often charge $20 to $35 per hour to install new floor joists and subfloors.  For laying a hardwood floor over concrete, it's best to use a floating floor system where the floor is not glued to the concrete.  Wood flooring is a major investment, so always have the concrete checked for moisture prior to installation.
Wood flooring can also be installed utilizing the glue-down method. This is an especially popular method for solid parquet flooring installations on concrete sub-floors. Additionally, engineered wood flooring may use the glue-down method as well. A layer of mastic is placed onto the sub-floor using a trowel similar to those used in laying ceramic tile. The wood pieces are then laid on top of the glue and hammered into place using a rubber mallet and a protected 2x4 to create a level floor. Often the parquet floor will require sanding and re-finishing after the glue-down installation method due to the small size pieces. Denver Hardwood Flooring
The age of your floor also plays a role. If your floor has been in place for decades, it may resist refinishing for a number of reasons. For instance, if it has already been refinished several times or if too much of the surface wood has become exposed, refinishing your floor may have little effect. For very old floors, replacement can often be preferable to refinishing. Denver Hardwood Floor
Solid hardwood floor planks are made from a piece of wood and made to be anywhere from 18 to 20 mm thick. The boards are made with a tongue and groove to fit together for installation. Depending on the species of wood, certain floors will be harder than others. The harder the floor, the less susceptible it is to dings and scratches. The floor can be sanded and refinished several times to restore its beauty, with the total number of times being determined by the depth of the tongue from the top of the plank. Denver Hardwood Floor

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. 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
If you’re thinking about redoing your hardwood floor, you might envision a refreshed look to your kitchen or hallway. You can picture your friends coming to your home for your next party and admiring your new floor, but you may find something standing in the way — you have no idea which type of hardwood flooring to get. With some research on your end, you can save yourself time and money. Let’s explore the features of some popular hardwood flooring types. Hardwood Floor
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