Rafters vs. Trusses for ADUs: Why Rafters Are the Smarter Choice

When building a garage or casita in Phoenix, one of the key decisions is how to frame the roof. The two main options are rafter-framed roofs (cut and assembled on-site) or trusses (pre-fabricated and delivered as a full system). While trusses are often the go-to for large homes with big spans, for smaller structures like ADUs, garages, and casitas, rafters offer major advantages—especially when working with a skilled carpentry-centric company like Old Reliable Construction.

Why Rafters Are the Better Choice for Small Structures

1. Faster Turnaround Time
   Trusses are built in a factory and can take weeks to fabricate and deliver. If the supplier has a backlog, you're stuck waiting. With rafters, framing can begin immediately, keeping your project on schedule.

2. More Design Flexibility
   Trusses are pre-engineered, meaning changes to the design can add delays and cost. Rafters, on the other hand, allow for custom roof pitches, vaulted ceilings, and exposed beams—great for giving your casita or garage a unique, high-end look.

3. Fewer Supply Chain Issues
   Trusses rely on specialized manufacturing, so if there’s a delay or mistake, your project stalls. Rafters use standard lumber, which is easier to source locally, reducing the risk of material shortages.

4. Easier to Work With on Small Lots
   If you're building an ADU or garage in a tight backyard, maneuvering massive trusses into place with a crane can be a logistical headache (and expensive). Rafters can be carried and assembled by hand, making them much more practical for small spaces.

But What About Larger Homes?

It’s important to note that rafters are ideal for garages and casitas with fairly small spans—our specialty at Old Reliable Construction. For larger homes or buildings with big spans, trusses do make sense. But when it comes to small, high-quality structures where speed, flexibility, and craftsmanship matter, rafters are the way to go.

The One Catch: You Need Skilled Carpenters

Rafter-framed roofs require real craftsmanship—the kind that many builders today simply don’t have. Luckily, Old Reliable Construction is built on expert carpentry. Our team of skilled tradesmen knows how to cut and assemble roofs the right way, ensuring your project is built to last.

Bottom Line: Call Old Reliable Construction

If you’re building a casita, ADU, or garage in Phoenix, rafters are the better option—and Old Reliable Construction has the best carpenters in the Valley to get it done right. Get in touch today to talk about your project!