TimberStep by Engineered Floors - Manufactured floor with the strength of Timber! This engineered laminate is 14 mm thick with an attached pad and AC4 durability rating. Planks are water resistant and can be installed in a waterproof system by sealing the perimeter expansion gaps with waterproof caulk. Melamine with aluminum oxide wear layer offers superior scratch resistance and outstanding durability. Angle tap click system and attached underlayment offer fast installation!