When measuring spacing for roof trusses, you need to be accurate to maintain a roof’s structural integrity. If you use the wrong spacing, your roof may not withstand the weight of the roofing material. It will finally cave in and damage your items or cause injuries.
The spacing between the roof trusses should be accurate to support the entire roofing structure. With proper spacing, the trusses will be easy to install. They will also be more stable to hold the roof and secure the walls, improving your safety.
This guide explores all the tips and factors to consider when measuring spacing for roof trusses. But before we start, let’s look at what roof trusses are.
What are Roof Trusses?
A roof truss is a prefabricated wood structure with a triangular webbing of a few wood pieces to support the roof. The roof trusses and rafters have several common parts, like the sloping rafter boards. However, they are different in terms of installation.
The difference is that roof trusses are built in a controlled environment (prefabricated), while the roof rafters are constructed on-site during roofing. Roof trusses tend to be more accurate because the components are digitally measured and machine-cut.
How Far Apart Should Roof Trusses Be
Since 80 percent of new homes are built using prefabricated trusses, roofing contractors need to maintain the standard measurements. They should use the correct spacing between roof trusses. So, how far apart should roof trusses be?
A standard roof truss spacing is often 24 inches from the center. The spacing between the center of one roof truss to the center of the next roof truss should be 24 inches or two feet apart. However, the spacing measurements can vary based on many factors.
When planning to install roof trusses, work with a roofing company that understands the measurements, such as Roof Master & Construction. That way, you’ll rest easy knowing that your roofing structure will be strong enough to support the weight of your roof.
What is the Spacing for Roof Trusses: Factors to Consider
The standard spacing for roof trusses is 24 inches. However, the measurements can change due to weather, the width of the building, and the roofing material. Other factors are the dead weight load, live weight load, and wind force against a roof.
Now, let’s look at the factors that affect the spacing for roof trusses.
Local Weather Conditions
The weather conditions in your region will influence the roof truss spacing and the type of roofing material to use. You can consult the local authorities to get more insight into how the local weather conditions affect roofing construction in the region.
If you use the wrong spacing for roof trusses, your roof may not withstand the pressures of weather conditions in your local area. The roof may eventually collapse and cause property damages or injuries.
You can avoid that by hiring a reliable roofing contractor. A roofing expert will ensure that the spacing for roof trusses matches your roof design regarding the local weather.
Width of the Building
When constructing a building, the design and engineering of the structure play a vital role in determining the spacing for roof trusses. If the building is too narrow or too wide, the groove trusses will experience immense pressure.
To avoid such inconveniences, you need to ensure that the roof’s apex (highest point) is in the middle of the roof. You have to ensure that the roof truss measurements are accurate to support the roof at the right place.
The width of a building will also help you determine your roof’s surface area. Wider buildings will generally require more roof trusses than narrow buildings.
Type of Roofing Material
The material you intend to install on the roof will affect the thickness of the roof trusses. It will also influence the number of roof trusses needed and the spacing between them.
For instance, if you plan to install the heavy natural slate or other stone-coated roofing materials, you need to put the roof trusses closer together to support the heavy load.
If you install aluminum metal roofing, which is a light material, you can quickly get away with larger spacing between your roof trusses.
Various roofing materials exert different pressures on the roof throughout its lifetime. So you should use trusses that can support the roof through thick and thin.
Live Weight Load
A roof’s live weight load comes to action when a live situation exerts pressure on it. That can be rainwater or snow falling on the roof or debris accumulating on the roof.
If you build an eco-home with plants or turf growing on the roof, you need to reduce the spacing between the roof trusses when designing and building the structure.
It will be crucial to account for factors like rainwater by providing drainage solutions that can lower the impact of rainwater on the roof.
Dead Weight Load
A roof’s dead weight load refers to the various structural elements that exert pressure on the roof trusses. For instance, the roofing material is a dead weight load.
If you are installing the natural slate on your roof for an old-fashioned home style, your roof trusses will have smaller spacing than aluminum, which has lower dead weight.
Wind Force against the Roof
When designing your roof, you should also consider the wind pressure exerted on it daily, especially if you reside in a hurricane-prone area or a region with strong winds.
The wind force against the roof will influence whether you’ll need a typical roof truss spacing or something more powerful and well-reinforced to resist strong winds.
If your local area experiences a lot of winds, consider adding smaller spacing between the roof trusses. That will make the roof more robust.
When designing or building a house, consider all the factors affecting the spacing for roof trusses. That way, you’ll find it easy to maintain your roof’s structural integrity for many years. Consider working with a professional roofing contractor who understands the local building codes and regulations.