Used wherever a ceiling support, finish support, or firestop is installed below an open attic

Required to guard against the hazard of blown-in or blanket insulation filling any framed opening or contacting the chimney and possible storage of combustibles against the chimney

Usable for new and retrofit installations

Half cylinder passes easily through ceiling openings between 16" O

C

joists

Part can be removed without cutting if attic is converted to habitable space and chimney is fully enclosed

Readily trimmed for reduced height installation close to eaves