Learn the top roof truss types for residential construction and find the right fit for your roof, budget, and home design.
11 Roof Truss Types for Homes and Buildings
Choosing the right roof truss type is one of the most important decisions in any construction project. Different truss designs affect roof strength, attic space, construction cost, and the overall appearance of a building.
Some trusses are better for large open spaces, while others work best for residential homes or energy-efficient designs.
In this guide, we’ll cover the 11 best roof truss types used in residential, commercial, and agricultural construction.
You’ll learn how each truss works, where it performs best, and the advantages and disadvantages to consider before building.
Whether you are planning a garage, barn, warehouse, or new home, this list will help you choose the right roof truss for your project.
What Is a Roof Truss?
A roof truss is a structural framework that supports the weight of a roof. It transfers the load down to the walls of a building. Trusses are made up of triangular units because triangles are the strongest shape in construction.
Most modern homes use prefabricated trusses built off-site and delivered ready to install. They are faster and more affordable than building a roof frame piece by piece on-site.
Trusses do more than hold up a roof. They also help define the ceiling shape inside your home. The type of truss you choose affects both the structure above and the living space below.
Most Common Roof Truss Types
There are many truss designs used in residential construction. Each one works better for specific roof shapes, spans, and budgets. Here is a breakdown of the most common types.
1. King Post Roof Truss
The king post truss is the simplest design. It has two angled top chords, a horizontal bottom chord, and one vertical post in the center.
It works well for short spans, usually up to 16 feet. It is affordable and easy to build.
2. Queen Post Roof Truss
The queen post truss is a step up from the king post. Instead of one center post, it has two vertical posts.
This allows it to cover longer spans, usually between 16 and 30 feet. It also creates more open space in the middle.
3. Fink Roof Truss
The Fink truss is the most widely used truss in residential homes. Its internal web forms a W-shape, which distributes the load very effectively.
It handles spans between 20 and 32 feet and works for most standard roof pitches.
4. Scissor Roof Truss
The scissor truss creates a vaulted ceiling effect inside the home. Its bottom chords cross each other in a scissor-like pattern.
It gives rooms a high, open feel without major structural changes. It costs more than standard trusses but adds visual space.
5. Attic Roof Truss
The attic truss is built with a large open space in the center. This space can be used as a room or storage area. It combines a livable attic with roof support in one frame.
It costs more but adds usable square footage.
6. Howe Roof Truss
The Howe truss uses vertical steel members and diagonal wooden members. The diagonals slope toward the center, which is the opposite of the Pratt design.
It handles heavy loads well and is often used in steel construction.
7. Pratt Roof Truss
The Pratt truss is efficient for longer spans. Its vertical members handle compression, and its diagonal members handle tension.
This design uses less material without losing strength, making it a good choice for budget-conscious builds.
8. Flat Roof Truss
Flat roof trusses are used when a building needs a low-slope or flat roof. They are not completely flat but have a slight pitch to allow water drainage.
They are commonly used in commercial buildings but appear in some modern homes too.
9. Hip Roof Truss
Hip roof trusses create a roof that slopes on all four sides. The truss system includes a series of girder trusses and jack trusses that work together. ‘
Hip roofs are more wind-resistant and work well in areas with high winds or heavy rainfall.
10. Gable Roof Truss
Gable trusses are placed at each end of a gable roof. They form the triangular shape visible at the side of the house.
They are often used alongside standard Fink or Howe trusses for the rest of the roof.
11. Mono Roof Truss
A mono truss has only one slope, like a lean-to or shed roof. It is commonly used for additions, porches, or garages.
It attaches to an existing wall on one side and slopes down to the opposite wall.
Roof Truss Types by Roof Design
Different roof shapes need different truss systems. Knowing which truss matches your roof design saves time during planning.
Trusses for Gable Roofs
Gable roofs are the most common in residential construction. They use standard trusses like the Fink or King Post along the main span, with gable trusses at each end. These are easy to source and install.
Trusses for Hip Roofs
Hip roofs require a more complex truss system. They use hip trusses, girder trusses, and jack trusses together. This adds to the cost and installation time but creates a more wind-resistant roof.
Trusses for Flat Roofs
Flat roofs use flat or parallel chord trusses. These allow for insulation and slight drainage slopes. They are less common in homes but are growing in popularity with modern architectural styles.
Trusses for Vaulted Ceilings
Scissor trusses are the go-to choice for vaulted ceilings. They allow the ceiling to follow the roof pitch, creating height and space inside. They cost more but are worth it for open-plan living areas.
How to Choose the Right Roof Truss
Choosing the right roof truss depends on your roof span, budget, ceiling style, and local weather conditions.
Smaller spans work well with king post or queen post trusses, while larger spans often require Fink or custom-engineered trusses.
Budget-friendly projects usually use standard prefabricated trusses, whereas attic and scissor trusses cost more because of their complex design.
Ceiling style also matters, especially if you want vaulted ceilings or extra attic space. In areas with heavy snow or strong winds, trusses must be engineered to handle additional loads and meet local building code requirements.
Roof Truss Materials
The material used in a truss affects its cost, strength, and how long it lasts. Three main materials are used in residential construction.
Timber Roof Trusses
Timber is the traditional choice. It is strong, easy to work with, and widely available. Timber trusses are common in older homes and heritage-style builds. They can be left exposed for a rustic look.
Steel Roof Trusses
Steel trusses are stronger and last longer than timber. They resist fire, rot, and pests. They are heavier and cost more, but they are a good choice for large spans or harsh climates.
Engineered Wood Trusses
Engineered wood, such as laminated veneer lumber (LVL), is the most common choice in modern residential construction.
It is lighter than steel, stronger than standard timber, and more affordable than custom steel work. Most prefabricated trusses today use engineered wood.
Roof Truss Costs and Installation
Understanding the cost and installation process of roof trusses helps homeowners plan their project more effectively and avoid unexpected expenses.
Standard Fink trusses usually cost between $35 and $150 per truss, while more complex options like scissor or attic trusses can range from $200 to $500 or more per unit.
Hip truss systems are typically more expensive because they require additional components and framing.
Prefabricated trusses are factory-made, quicker to install, and often more affordable than stick-built trusses, which are assembled on-site for custom designs.
Installation costs also depend on roof size, truss style, crane usage, and local labor rates. Larger and more complex roof structures generally require more labor, time, and materials, increasing the overall project cost.
Conclusion
I know how confusing it can get when you're staring at a construction plan and trying to figure out which truss makes the most sense. I've been there, and trust me, once you match the truss to your roof shape and budget, it all clicks into place.
The right roof truss keeps your home safe, your costs in check, and your ceiling looking exactly how you want it.
If this helped you, drop a comment below or share it with someone planning a build. You've got this.
Frequently Asked Questions
What is the most common roof truss used in homes?
The Fink truss is the most widely used in residential construction. Its W-shaped web design handles standard spans well and is cost-effective.
How long do roof trusses last?
With proper installation and maintenance, timber and engineered wood trusses can last 50 to 80 years. Steel trusses can last even longer when protected from rust.
Can I walk on roof trusses?
Trusses are not designed for foot traffic. Walking on them can damage the structure. Always use proper support boards during installation or inspection.
Do roof trusses need maintenance?
Timber trusses should be checked periodically for moisture, rot, or pest damage. Steel trusses should be inspected for rust. Engineered wood trusses generally require less upkeep.
What is the difference between a roof truss and a rafter?
A rafter is a single sloped beam that supports the roof deck. A truss is a complete pre-built framework of multiple members. Trusses are faster to install and usually more affordable than traditional rafter systems.
