Floor installation should be the final step after any other decoration work. Be sure the sub floor is completely dry, clean, flat, and sound before starting. Vacuum or sweep the floor thoroughly to get it free from dirt or any other substance. See ill. No.1. If the sub floor is concrete, it should be older than 30 days (this is for a "new" build or newly poured cement slab). The preferred room temperature is  21? (70 ?) with a relative humidity of 35%~60%. The cork floor planks need to be acclimatized for 24 to 48 hours within the job site. Check for flatness. Any bumps or hollows exceeding more than 4mm within 1 square meter area (the length of one flooring plank) below or above the standard level should be sanded down or filled with filler. See ill. No.2. Cork floating floors are intended for indoor use (as with any other flooring system such as laminate flooring). Installing floating floors in humid areas such as bathrooms or laundry rooms is not recommended. Cork tiles (glue down flooring) should be used in such instances. Installation: Step 1. Step 1. Lay the planks lengthwise with the direction of sunlight. Check for color harmony and consistency in the flooring. This can be done when allowing your materials to acclimatize beforehand. Manage abrupt patterns by relocating planks. This allows for a more natural transition between color variances in the cork. See ill. No.3. Step 2 . Installing over a concrete sub-floor usually requires some