How to expand the doorway

The need to increase the door opening can occur when replacing the door, as well as its installation in the elevated area.
Before working, you should obtain permission to authorized organizations, as the activity is legally classified as redevelopment of housing.

According to the town planning rules and regulations, in buildings with brick and concrete walls allowed extension doorway width and 200 cm in height - 210 cm, with the proviso that the wall is not carrier. The rooms located on the lower floors of the building, both office and residential, 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 door. Then, by measuring the distance by which the aperture is increased, its contour should be applied on the wall with a ruler, spirit level and plumb.
The expansion of the opening can be made in two ways:
According to the marking lines are drilled through holes being disposed at a minimum distance from each other. After that, a small hammer and chisel breaking webs between the holes and removed parallelepiped concrete or brick.

This method causes the application of a cutting tool for metal disk in the exceptional case - if necessary armatures situated on the intended location of the opening. After this treatment the wall edges are uneven, so the necessary subsequent sealing of the doorway by means of arrangement of the slopes.

Diamond cutting involves better treatment of reinforced concrete or brick wall. A tool with a disk with diamond-tipped cutting apply when concrete, bricks and fitting. The geometrical shape of the slice corresponds exactly Allocated markup aperture, and the treated surface is obtained smooth walls, without chipping or cracking. However, this method has one very significant drawback. In its application, a large number of dust, protect furniture and furnishings from the effects of which - not an easy task. Constant wetting the disc during cutting may partly contribute to the solution of this problem. In general, it is desirable to remove from the premises all the repaired items of furniture, and the walls and ceiling, to avoid falling construction dust, hide plastic wrap.

It is advisable to buy a door structure in advance. Later, during the works, it will avoid many of the problems associated with the expansion of the opening, and insert the door to the maximum precision.