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. Denver Hardwood Floor
Because tongue-and-groove boards are locked in place, removal involves cutting out the middle of each damaged board. The easiest way is to bore a 1-in.-dia. hole through both ends of each damaged board (photo 1). Then use a circular saw to connect the two holes (photo 2). Follow these steps to safely make the plunge cuts you need to repair your hardwood floors: 1. Adjust the depth of cut to the thickness of the floorboards. Plug in the saw and put on eye protection. 2. Pull back the retractable blade guard with your thumb. Then hold the nose of the baseplate on the floorboard and lift up the rear of the saw. 3. Align the blade with the right edge of one of the holes. Make sure the blade isn't touching the floor, then squeeze the trigger and slowly lower the spinning blade into the board. 4. Grip the saw firmly with both hands and guide it in a straight line until you cut into the right edge of the hole at the opposite end of the board. 5. Move back to the first hole, align the blade with the left edge and cut to the left edge of the second hole. Pry out the middle section with a hammer and chisel. Chop out the remaining edges, being careful not to damage any surrounding boards (photo 3). The "tongue" piece will be nailed in place, so break it out in small pieces. Then pull out the nails with a hammer or locking pliers. The existing floorboards have a tongue and groove milled on each end and along the edges. Chop off the tongue exposed by the board you just removed so you can slip in the new board (photo 4).
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. Hardwood Floor
Besides major problems, you may also experience scratching or loose planks with your hardwood flooring. Scratches can be repaired with touch up kits, or something as simple as a like colored crayon. If you’ve got serious scratching, however, you may need to hire a contractor to refinish the flooring altogether. And if you’ve got loose planks, your only solution is to tie them down. Ideally they should be nailed to the subfloor to prevent any more movement, though excessively loose boards can be a sign of improper installation in the first place. Bringing in a professional hardwood installer to re-install your flooring properly is probably the only sure way to permanently solve the problem. Hardwood Floor
Cupped floors, also called washboarding, develops gradually across the width of the wood strip where the edges of the hardwood planks raise up and the center of the board sinks down. The cause of cupped floors is a moisture imbalance where there is more water on the bottom side of the wood plank than on the top. The only cure is to balance the humidity levels in your home, and to give the surface time to return back to normal. After the floor has stabilized, you can have a professional sand it flat and re-finish it to perfection.
Engineered wood flooring has other benefits beyond dimensional stability and universal use. Patented installation systems allow for faster installation and easy replacement of boards. Engineered wood also allows for a floating installation where the planks are not adhered to the subfloor or to each other, further increasing ease of repair and reducing installation time. Engineered flooring is also suitable for underfloor and radiant heating systems. Denver Hardwood Floor Install
Solid wood flooring is milled from a single piece of timber that is kiln or air dried before sawing. Depending on the desired look of the floor, the timber can be cut in three ways: flat-sawn, quarter-sawn, and rift-sawn. The timber is cut to the desired dimensions and either packed unfinished for a site-finished installation or finished at the factory. The moisture content at time of manufacturing is carefully controlled to ensure the product does not warp during transport and storage. Hardwood Floor