Percival P. Cassidy wrote:
The roof space of our 30-yr-old house is continuous. I.e., there is no
wall at all between the part above the garage and the part above the
living area.

Is that a Code violation? Should we think about constructing a
fireproof/fire-resistant barrier in the roof?

Perce


To provide a one-hour fire resistive seperation between the garage and
the dwelling, install drywall (5/8" type X) on the dividing wall between
the garage and house on the garage side extending up to the roof
sheathing, or drywall that same wall up and out on the ceiling of the
garage. Tape the joints.

Btw, openings between the garage and dwelling shall be provided with a
1-3/8" solid wood or metal clad door installed with a self-closing
device. Openings in one-hour resistive ceilings are permitted if
protected by a UL listed fire door.