I'm installing a hung ceiling using the 1x1 armstrong tiles. I tried to put 4 tiles to a grid -surrounded by cross tee's but they're sagging in and the ends of the tiles set into the cross bars are not laying flat.
Should I only be doing 2 to a grid? What is the common installation. It's incredible how little information there is on this subject other than how to layout the grid.
Or is there's any good web links that describe solving problems.
Barry Feldman
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