How many times can a solid wood floor be sanded?
-> Normally, three times of sanding with different number of girt will remove 0.5mm to 1mm of wood from the surface of the floor depending on the floor level and type. 19mm thick floor priduct has 7mm of wood above the tongue so that a floor could be completely sanded and finished six to ten or more times before one would reach a depth where the top of the groove edge is weakened.
A definitive answer can not be given because no two people will sand a floor in the same manner. The amount of wood removed will depend upon the number of papers (different grits) the sanding machine operator uses and the manner in which he moves the machine. Normally, the operator will use three papers to sand a floor. Some will only use two. This will depend on the condition of the floor prior to sanding. Normally, a three paper sanding will remove 1/64″ to near 1/32″ of wood from the surface of the floor. A NOFMA member’s 3/4″ thick flooring product has 19/64″ of wood above the tongue so that a floor could be completely sanded and finished numerous times (six to ten or more) before one would reach a depth where the top of the groove edge is weakened. Typically when refinishing a recently finished floor to change color or repair a problem finish, 1/64″ or less of the wood material is removed. Thus, even more sandings can be performed on flooring that does not require the heavy sandin
