Attic rafters

It depends on the type of roof, but generally collar ties will help with structural stability for a roof. If you are looking to finish your attic, there may be other considerations, and collar ties are not necessarily a replacement for any existing structure.

Collar ties are an essential structural reinforcement required by building codes. Here is why they matter and how they work: What They Do Prevent Ridge Separation: They stop the roof rafters from separating or tearing away from the ridge board during severe weather. Resist Wind Uplift: Strong wind blowing over a roof acts like airplane wings, creating upward suction. Collar ties lock the two sides together to counteract this lift.

It can help, but it depends on the roof. Collar ties arent always the right fix. If there’s movement or sagging I’d check the rafters and framing first before adding anything.