Over several weeks and even months the mysterious crud spread onto adjoining floors and materials.
Black spots on engineered hardwood.
Dip a small brush such as a toothbrush into a small amount of bleach and rub onto the stain.
With the proper care hardwood floors will last a lifetime.
Dark spots on hardwood flooring are commonly the result of some type of liquid that has soaked into the polyurethane finish and top layers of wood.
I considered black iron oxide contamination but such spots encapsulate once the finish is dry and do not spread.
To remove dark water stains from wood floors you have two options.
For more on black spots see my previous article what causes mysterious black spots in wood floors.
Unlike white water stains residing on the very surface of the hardwood floor dark stains require more steps and products in order to restore the beauty of the wood.
Black spots on wood can also appear due to prolonged exposure of water and metal nails forming the iron oxide.
Ceramic tile sheet.
However items such as oil water grease and pet urine will create black spots on the hardwood floors.
The use of the best hardwood steam mops is recommended for sealed floors.
These discolorations will cause your hardwood floors to look old and dingy.
It reacts with the tannin in the wood and turns black.
The gulf coast area home was late 1970s construction with a concrete slab.