This repair is continued from Part 1.
I’ve made the rough cut to remove the water damaged portion of the ceiling drywall. Using the combination square, pencil lines are marked to square up the hole for the final cuts. The lines are marked to align with the suspended ceiling metal runners as seen through the hole.
Square Up the Drywall Ceiling Hole
The replacement drywall panel will be screwed into the bottom of the metal support runners. A utility knife is used to cut the drywall along the squared lines to expose the edge of the runner. Score the paper face of the drywall first, then plunge the blade in making a seesaw motion with successive passes, and finally a long deep pass to complete the cut.
Cutting along the other metal support runner:
The damaged section is cut away and the hole is squared exposing the two metal support runners.
Another angle with a good view of the bottom of the shower drain pan, drain body and U-bend.
Plywood Drywall Ceiling Reinforcement
A 9in x 4in x 1/2in plywood bracing board is installed on the right side of the hole to provide a hard point to fasten the new drywall ceiling panel.
The plywood brace is attached to the ceiling using 1-1/4″ drywall screws and the drywall screw setter bit. I allowed for a generous ~2″ overlap into the hole to attach the replacement panel.
The drywall screw setter is a Philips driver set inside a collar. This automatically sets the drywall screw at the proper depth without tearing through the paper face of the drywall. The countersunk screw can then be covered with joint compound for a perfectly smooth finish.
Plywood backer brace fastened with two screws. I started to set a 3rd screw in the metal runner then realized the screw head would interfere with the replacement panel. The two screws were plenty strong enough for the task.
SHEETROCK® Brand Repair Clips
Home improvement and hardware stores sell SHEETROCK® Brand Repair Clips – these are metal clips that are fit over the edges of the drywall hole to fasten a repair panel with screws. The SHEETROCK clips could be used in place of a wood brace and appear to be structurally sound, avoiding the sagging problem of the self-adhesive metal mesh patches.
This repair is continued in Part 3.
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