The system of building an arch is very similar to the construction of multi -level ceilings. First you need to dismantle the door and remove the old finish. The frame of profiles must be mounted so that its thickness is equal to the thickness of the wall minus double thickness of the drywall itself. The guides are cut and attached along the perimeter of the future arch. Then they add ceiling profiles to them at the height at which there will be a radius of the arch.
