If you change ordinary doors to fire doors, then you will have the task of filling the door slot. The first thing you need to start completing this task is to cut off the excess installation foam. For these purposes, it will be necessary to use a fairly sharp knife.
After that, you will need to take moisture -resistant drywall, from which two side stripes of the size you need should be cut. The height of the strips will be equal to the height of the slopes. Be sure to ensure that these stripes are quite even. Then insert this strip into the formed opening and look that a strip of drywall to lay down smoothly. As soon as the strip is finished, you will need to dilute the glue that must be applied to the side strips of drywall. After that, the already finished part of the drywall, which is smeared with glue, inserts back into the door frame and crush well. Then with small tapping should you walk along the entire length of the drywall. After the lateral parts are trimmed with drywall, the same procedure is repeated with top. In order to check how even the wall is the wall of the gap with drywall, you can use the building level. If the slope turned out even, then you do not need to do anything. If irregularities are revealed, then they can be removed using a starting putty.
