For our doors, it is necessary to prepare a rigid base, since the door is quite heavy. Good a rigid base is a guarantee that the door will not sag and will serve for a long time and reliably.
The base can be made of a concrete screed; in order to remove the cold bridge in the door, it must be installed under the threshold profile , which will be located between the concrete and the aluminum threshold of the door.
Example: 1
Example: 2 ( The client has prepared the base for the static element, the heel. And flooded the floor from inside the room.)
Example: 3 ( Installation of doors without a retaining profile, on a prepared base of a clean floor. )
Example: 4 (Installing a door into an old opening without changing the floor covering.)
Bad example