The quick answer is YES. Roof battens no matter how you look at them are a structural element of any roof.
Roof battens are one of those constantly misdiagnosed and overlooked aspects of roof construction. But roof battens provide some extremely important structural functions to protect your roof.
Provide a breathable space that allows condensation to be minimized.
Allowing roofing materials to be fastened securely to the roof trusses
Increase the roof truss and stick roof systems structural performance
help with alignment of colorbond or zincalume roofing sheets
The decision of which roof batten material is right for your home is vital. Similarly is the design of any roof batten system.
This is because your roof battens help spread the load stresses. Such as wind (uplift and direct loading) and weight across the stick roof or roof truss system.
Roofs can be subjected to great forces most notably during high wind and cyclonic events. Equally important to note many roofing systems have failed due to the use of incorrect fasteners. in the same fashion, they could choose the wrong roof batten material choices.
It is essential to get the correct advice whether you are designing and constructing a new roof. Likewise undertaking a complete roof replacement.
Timber Roof Battens
TILED ROOFING | METAL ROOFING
Hardwood or Timber roof battens are known as the traditional roof batten material. They have successfully stood the test of time.
Timber roof battens can be used for all types of roofing including tile and metal or colorbond. However, it is essential that they are correctly engineered and take wind loading for your specific suburb or town.
Hardwood roof battens are the preferred choice in areas with higher winds. This is because mechanical fasteners can be torn out of softer woods such as pine.
There is a considerable difference too in the amount of pull resistance that can be offered by seasoned wood. When it is compared with green wood.
Most forget that suction or uplift causes considerable destruction by the wind to roofs. So it is absolutely vital that your engineer makes the correct calculations. Engineers are guided by the span tables in AS1684.
Timber roof battens are generally used when undertaking tile roofs. Whether you are using terracotta roof tiles or concrete roof tiles.
If you are completing a roof replacement with tiles you may find that some of the original roof battens need to be replaced. Equally important For tiled roofs using Timber battens they must meet the requirements of AS 1684.2, AS 1684.3 or AS 1720.1.
Timber battens for metal roofs come in a range of sizes:
75 x 45
90 x 35
90 x 45
Your options of roof batten size here will be determined by the weight and span of your metal roof panels.
Each product requirement is different. For example, roof batten spacing for (0.42BMT) metal roofing needs to be no more than 1100 mm apart. Whereas batten spacing for 0.48BMT metal roofing can spread up to 1600 mm apart.
Click here for confirmation from our friends at wood solutions. They will help with the guidelines of the Australian standards 1684.2 timber framing guide.