NEWARK, Ohio — Ceiling panels in schools have difficult lives, with pencils launched into them and assorted other indignities. Tectum Inc. makes panels that can stand up to the punishment and absorb ...

NEWARK – Some employees who started in the 1980s were told the company would not survive much longer. Tectum has done more than survive, despite fires, tornadoes, worker strikes and ownership changes.

Armstrong World Industries has an agreement to buy Tectum Inc. of Newark, a manufacturer of sound-dampening ceiling and wall panels. Armstrong World, based in Lancaster, Pennsylvania, did not disclose ...