If you’re building or remodeling a home, the choice between rafters and trusses can impact your budget, timeline, and design options. To speed up construction, choose pre-engineered, factory-built trusses. For more flexibility in custom projects, contractors build rafters on-site.
Trusses are typically 20%–50% cheaper than rafters because they require less labor and install quickly—often in a day with a crane. Rafters, on the other hand, take longer to build and require skilled carpentry, making them ideal for custom homes, remodels, or structures with complex roof designs.
Trusses are the go-to choice for most new homes because they’re efficient, strong, and cost-effective. However, if you’re renovating an older home or need a unique roof structure, rafters may be the better option.
In this guide, we’ll break down the differences between rafters and trusses, their pros and cons, and when to choose one over the other.
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Do Rafters and Trusses Do the Same Thing?
Yes, both serve as the structural framework for a roof, but they function differently.
Trusses are pre-built and self-supporting, meaning they don’t need extra beams or joists for stability. This makes them faster and easier to install. Rafters are just one part of a traditional roof framework and require additional components like ceiling joists and collar ties. They’re built on-site, which allows for adjustments but takes more time and expertise.
If you need a fast and affordable roofing system, trusses are usually the best choice. If you’re working with a custom design or an older home that needs modifications, rafters may be necessary.
Related: How Much Does Raising a Roof Cost?
How Do Rafters and Trusses Support a Roof?
Both rafters and trusses determine the pitch (slope) of a roof. This affects not only the home’s appearance but also how well the roof sheds water and snow. Rafters set the pitch with individual boards, which must be reinforced with joists and other supports. Trusses use a central “chord” instead of a traditional rafter board, distributing weight efficiently.
Trusses can span longer distances without needing additional weight-bearing walls, making them ideal for open-concept home designs.
Why Are Trusses More Common in New Construction?
Trusses have largely replaced rafters in new homes due to their faster installation, lower cost, and better structural performance.
Rafters take much longer to cut and assemble, whereas trusses can go up in a single day. Because they require less labor, trusses are 20%–50% cheaper than stick-built rafters. Trusses reduce the need for interior support walls because they distribute weight efficiently.
Most builders prefer trusses because they save time and money without compromising strength.
What Are the Advantages Of Using Rafters?
Rafters provide flexibility that trusses cannot:
✔ Customizable on-site – Great for remodels that need precise adjustments.
✔ Ideal for unique designs – Works well with open ceilings, cathedral ceilings, and complex roof shapes.
✔ No need for a crane – If a job site is hard to access, rafters can be built without heavy machinery.
However, rafters take longer to install and require skilled carpenters, which can drive up labor costs.
You might want to explore our article to discover the appropriate the spacing and dimensions of rafters.
What Are the Disadvantages Of Using Rafters?
The biggest drawbacks of rafters are cost and time:
❌ More expensive – Requires skilled labor and more time, increasing overall costs.
❌ Slower to build – Unlike trusses, which arrive ready to install, rafters must be cut and assembled on-site.
❌ Not always structurally efficient – In some cases, rafters can’t span large distances without additional support beams or load-bearing walls.
For these reasons, most modern homes use trusses instead.
When and Where Would I Use Rafters?
Rafters are still used in certain situations, such as:
- Renovations and remodels – If an older home has settled over time, rafters can be adjusted on-site to fit the existing structure.
- Custom homes – Unique roof shapes, exposed beams, or cathedral ceilings often require rafters.
- Difficult job sites – In remote or tight spaces where a crane can’t be used, rafters may be the only option.
While trusses are more efficient, rafters provide flexibility that prefabricated systems cannot.
Read also: Gable Roof and Hip Roof Compared
What Are the Advantages Of Using Trusses?
Trusses are fast, strong, and cost-effective, which is why they’re used in most new homes:
✔ Quick installation – A full truss roof can be installed in a day.
✔ Cheaper than rafters – Prefabricated trusses reduce labor costs.
✔ Can span larger distances – Trusses can eliminate the need for weight-bearing walls, allowing for open-concept floor plans.
Additionally, computer-designed trusses ensure precision and consistency.
What Are the Disadvantages Of Using Trusses?
Despite their benefits, trusses have some downsides:
❌ Not customizable on-site – Any modifications will weaken their structural integrity.
❌ Requires a crane – Most trusses need heavy equipment for installation, which can be costly or impractical in tight spaces.
❌ Longer lead times – Since they’re factory-made, any delay in delivery can slow down your project.
If you anticipate needing adjustments, rafters might be the better option.
If you want to learn more about the pros and cons of roof trusses, check out our guide for setting up roof trusses.
How Do I Decide If I Should Use Rafters Or Trusses?
Go with trusses if:
✔ You’re building a new home or addition.
✔ You want the most cost-effective and fastest option.
✔ You need to span large distances without extra support.
Go with rafters if:
✔ You’re renovating an older home that requires precise adjustments.
✔ Your job site isn’t accessible to a crane.
✔ You need a fully custom roof design.
In some cases, a combination of trusses and rafters is the best approach, especially for homes with complex rooflines.
Can I Use Rafters and Trusses Together?
Yes! Many homes combine trusses for main roof support and rafters for detailed sections like dormers, bay windows, or vaulted ceilings. Combining both can create a custom design while keeping costs and installation time under control.
The Best Of Both Worlds
In everyday construction, professionals will integrate both trusses and rafters into the project. There are no hard and fast rules governing where to use trusses or rafters. Therefore, in most situations, the decision will come down to location, experience, resources, and time.
This site receives compensation from the companies featured in this listing, which may impact where and how products appear. This listing doesn’t feature all companies, products, or offers that may be available.
