Black spots on wood can also appear due to prolonged exposure of water and metal nails forming the iron oxide.
Black spots on engineered hardwood.
With the proper care hardwood floors will last a lifetime.
The homeowner was convinced the flooring was defective and wanted the floor replaced.
To remove dark water stains from wood floors you have two options.
Over several weeks and even months the mysterious crud spread onto adjoining floors and materials.
It reacts with the tannin in the wood and turns black.
Last january i was commissioned by a flooring manufacturer to inspect a prefinished 3 inch engineered oak floor that had developed dark spots.
The use of the best hardwood steam mops is recommended for sealed floors.
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.
However items such as oil water grease and pet urine will create black spots on the hardwood floors.
For more on black spots see my previous article what causes mysterious black spots in wood floors.
These discolorations will cause your hardwood floors to look old and dingy.
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.
Ceramic tile sheet.