Although many people speak about hardwood floors as a single building material, it’s important to understand that they can be made from dozens of different tree varieties, and each has a different color, price and durability. Here are a few of the most popular hardwood flooring options, along with some unique characteristics of each and average pricing: Denver Hardwood Floor Install
If you get a second opinion and they can’t be refinished, then your best option will be replace them…or wait until you can replace them. Given when the house was built I’m doubting the floors are even, so putting a floating on top will be a really bad option as they will wobble. And, installing wood on top of thin wood is a really bad solution. If your foundation is weak, your floor will be weak and it will creak and separate.
Instead of boiling the hardwood logs, in this process they are kept at a low humidity level and dried slowly to draw moisture from the inside of the wood cells. The logs are then sawn in the same manner as for solid hardwood planks. This style of engineered hardwood has the same look as solid hardwood, and does not have any of the potential problems of "face checking" that rotary-peel and slice-peel products have, because the product is not exposed to added moisture. Denver Hardwood Floor Install
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. 
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.
With so many potential problems and repairs that a wood floor could need, you’re probably wondering how much the potential solutions will cost. It might make you feel better to know that the average wood floor repair costs around $1000, with minor repairs costing as little as a couple hundred and major jobs costing well in to the thousands. This is definitely a job that you’ll want to get a few quotes from contractors in order to feel comfortable with your particular repair needed or how you can repair the wood floor yourself.
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 Flooring
Enhance your home with beautiful hardwood flooring that Enhance your home with beautiful hardwood flooring that fits your budget. Full of abundant character and color variation Bruce Plano Gunstock Oak celebrates the beauty of natural hardwood. Enjoy natural features including mineral streaks knots and small holes and minor milling imperfections. Design your floor to your unique tastes with ... More + Product Details Close Denver Hardwood Floor Install
Not only is bamboo resistant to moisture, but it is environmentally friendly and an optimal choice for those who are looking to build “green.” The plant grows faster and does not take as long to re-grow than a typical hardwood tree, therefore not contributing to deforestation. Bamboo flooring is softer than traditional hardwoods, so it will not cause pain if it is stood on for long periods of time. The softness of the floor will also reduce noise. Hardwood Floor
– If you want to change the width of the wood or the direction of the hardwood, the only way to do this is to get a new floor. The standard in home is oak 2 ¼” strip. Now, it’s more stylish and more common to get wider planks such as 3 ¼” or 4”or 5” planks. These look more modern and importantly make the room look larger. Another design trick to make the rooms look larger is to lay the planks on a diagonal – that way, it carries your eye along the longest length of the room. Or, you can even get fancy and add borders or do a herringbone pattern. Denver Hardwood Floor
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. Hardwood Floor