It is important to pay attention to the preparation of the building opening to fit the door properly and provide its proper functioning. You have to start with the correct measurement of the door and determine its opening direction. Right at the beginning of the door planning it is necessary to select the type of doorframes and opening which have the large impact on the building opening size. It is important to fit the door after the floors have been finished whereas the use of traditional thresholds or modern transitional skids must be considered. The readiness and realization of construction opening is your responsibility or the responsibility of your construction supervisor. But no worries, if we come to the conclusion that the space does not have necessary parameters (finished coats, floors, humidity of given rooms), we will give you the time for adjustments and agree on another date of installation.