Black Spots On Engineered Hardwood

It reacts with the tannin in the wood and turns black.

Black spots on engineered hardwood.

Last january i was commissioned by a flooring manufacturer to inspect a prefinished 3 inch engineered oak floor that had developed dark spots. For more on black spots see my previous article what causes mysterious black spots in wood floors. Over several weeks and even months the mysterious crud spread onto adjoining floors and materials. However items such as oil water grease and pet urine will create black spots on the hardwood floors.

Black rings or dark water marks can be more problematic as these are generally water stains that have penetrated into the finish of the floor. 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. Black spots on wood can also appear due to prolonged exposure of water and metal nails forming the iron oxide. With the proper care hardwood floors will last a lifetime.

The use of the best hardwood steam mops is recommended for sealed floors. To remove dark water stains from wood floors you have two options. The gulf coast area home was late 1970s construction with a concrete slab. I considered black iron oxide contamination but such spots encapsulate once the finish is dry and do not spread.

Dip a small brush such as a toothbrush into a small amount of bleach and rub onto the stain. The homeowner was convinced the flooring was defective and wanted the floor replaced.