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The self-tapping screw is screwed on the keel, and the air gun is not firmly hit.
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Or use drywall nails better.
Install the aircraft plug first, and then install the lamp with screws, or replace the drywall, panel lamp replacement, 60 60 or other sizes, it is recommended that you go to the lighting store to turn around which to test.
If it is not too heavy, you can use the main keel boom to fix the chandelier, if the lamp is heavier, you must first install the hook on the top plate, and then hang the chandelier rod through the gypsum board on the hook.
First of all, there will be a keel in the plasterboard ceiling, and the general ceiling lamp is not particularly important, it is installed. >>>More
If you want to install the crystal lamp, you should fix the expansion bolt to the top surface in advance before doing the ceiling (modeling), that is, you should be ready to install the crystal lamp in advance - the crystal lamp is relatively heavy! >>>More
If you want to install downlights, you must make holes in the gypsum board according to the size of the downlights you buy. What you said about the lack of holes in the sail is in the floor slab, most of the home decoration ceilings are the hall of the wooden dragon skeleton, so the wooden frame is done and then nailed to the floor with nails, no need to punch holes.