If your grid holds 24 x 48 tiles try a scored product that s designed to look like 24 x 24 panels.
Replace single ceiling tile.
For a quick update pop old tiles out of the ceiling grid and replace with fresh ones.
We simply removed all tiles in that corner to install replacement tiles.
The replacement tiles have two sides with an extended lip for stapling to the framework as well as a recessed groove for the lip of the tile next to it see first photo below.
Unlike drop ceiling acoustic tiles that fit into a suspended frame most interlocking tiles are mounted on the ceiling with nails staples adhesive or a combination of the three.
If they were attached to furring strips the job will be easier.
Some ceiling tiles manufactured prior to mid 1970 contain asbestos.
With this style you won t need to purchase additional cross tees just pop out the old ceilings and place in the new.
Investigate how the ceiling tiles are attached.
If they re glued directly on it will take some extra effort to remove them.