The need to increase the doorway may occur when replacing the door, as well as when installing it in the erected room.
Before the work, the appropriate permit in authorized organizations should be obtained, since this activity is legally assigned to the redevelopment of housing.
According to urban planning standards and rules, in houses with brick and reinforced concrete walls it is allowed to expand the doorway in width up to 200 cm, up to 210 cm, provided that the wall is not a carrier. In premises located on the lower floors of the building, both office and residential, an extended opening will require additional strengthening.
Before proceeding directly to the expansion of the opening, it is necessary to dismantle the old door frame and the door. Then, having measured the distance to which the opening will be increased, it should be applied to the wall using a ruler, building level and plumb.
The expansion of the opening can be made in two ways:
Through the marking line, through the openings are located at a minimum distance from each other. Then, with a small sledgehammer and a chisel, jumpers between the holes are broken, and concrete or brick parallelepiped is removed. This method determines the use of a cutting tool with a metal disk in an exceptional case – if it is necessary to cut the reinforcement located at the site of the alleged opening. After such processing, the edge of the wall remains uneven, so the subsequent sealing of the doorway is needed by arranging slopes.
Diamond cutting involves better processing of a reinforced concrete or brick wall. A tool with a disk with diamond spraying is applicable when cutting concrete, brick and reinforcement. The geometric shape of such a cut precisely corresponds to the applied markup of the opening, and the processed surface of the wall is flat, without chips and cracks. However, this method has one, very significant drawback. When using it, a large amount of dust is formed, to protect furniture and interior items from the impact of which is not the task of simple. Constant wetting of the disk during cutting can partially contribute to solving this problem. In general, it is advisable to remove all furniture items from the repaired room, and its walls and ceiling, in order to avoid building dust, are covered with polyethylene film.
It is advisable to purchase the door structure in advance. In the future, in the work of work, this will avoid many problems associated with the expansion of the opening, and install the door in it with maximum accuracy.
