What makes Onduline roofing sheets WIND RESISTANT?

Thanks to their unique, patented fastening system, ONDULINE® roofing sheets withstand high wind loads by absorbing shocks and vibrations. Wind resistance is 225 km/h when installed on metal structures, and up to 260 km/h when installed on wooden purlins.1

1 External tests Belgium Building Research Institute (BBRI)- DE 651XM223 CAR 15070/1 (29) = ONDULINE® CLASSIC Metal Purlin = 3000Pa (225 km/h) / DE 651XM223 CAR 15070/2 (29) = ONDULINE® CLASSIC Wood Purlin = 4000Pa (260 km/h).

Onduline sheets strong resistance to high wind

A unique fixation system to prevent wind load from damaging the roof

To prevent wind load from damaging a roof, it is important to ensure that the roof is designed and constructed to withstand the forces that can be created by the wind. By using strong fasteners and provinding adequate anchorage at the edges of the roof you minimise the risk of wind damage.

Fasteners play a crucial role in the installation. Here are some reasons why fasteners are important when installaing a roofing sheet:

• Wind resistance: fasteners prevent sheets from being blown off in strong winds.
• Durability: properly installed fasteners ensure long-term roof durability.
• Watertightness: fasteners help seal the sheets and prevent water leaks.
• Aesthetics: properly installed fasteners help maintain a neat and uniform appearance of the roof.

What makes ONDULINE® roofing sheets special is their unique and patented fixation system with washer of minimum 16 mm and a minimum of 10 fixations per m2. It allows to create a mechanical bond between the sheet and the support, which prevents the roof from being lifted by the wind pressure and resist even to the strongest winds.

Where roof pitch is less than 10°, there is no increase of wind load for ridge and hips.

What is wind load on a roof?

Win load can have a significant impact on a roof and its overall structural integrity. When wind blows over a building, it creates a force that exerts pressure on the roof surface. This pressure is known as wind load, and it can cause the roof to experience various types of stress, such as uplift, suction and shearing forces.

• Uplift is the most common type of stress caused by wind load. It occurs when the wind blows over the surface of the roof and creates a vacuum effect that lifts the roofing materials upward. This force can be particularly strong near the edges of the roof, where the wind can get underneath and create a lifting effect.
• Suction force is another type of stress that can affect a roof due to wind load. This occurs when the wind blows over the roof and creates a low-pressure zone that can suck the roofing materials downward. This force can be particularly strong near the edges of the roof, where the wind can create a negative pressure zone. If the suction force is strong enough, it can cause the roof to become dislodged or even break.
• Shearing forces are created when the wind blows over a sloping roof and creates a horizontal force that can puch against the roof structure. This force can be particularly strong neat the peak of the roof, where the wind can create a shear effect. If the shearing force is strong enough, it can cause the roof structure to buckle or even collapse.

What is the resistance capacity of ONDULINE® sheets to strong winds?

ONDULINE® CLASSIC roofing sheets can justify a very strong resistance to high winds, up to 225 km/h when installed on metal structures, and up to 260 km/h when installed on wooden purlins.1 It makes of it a particular clever choice for coastal aread, areas subject to typhoons and where buildings are particularly exposed.

The product ONDUVILLA® can even resist to a wind speed of 315 km/h when installed on metal structure, and up to 290 km/h when installed on wooden purlins.2

All our test where run by an external third party, the Belgium Building Research Institute (BBRI).

1 DE 651XM223 CAR 15070/1 (29) = ONDULINE® CLASSIC Metal Purlin = 3000Pa (225 km/h) / DE 651XM223 CAR 15070/2 (29) = ONDULINE® CLASSIC Wood Purlin = 4000Pa (260 km/h)

2 DE 651XM225 CAR 15070/1 (29) = ONDUVILLA® Metal Purlin = 6000Pa (315 km/h) / DE 651XL019 CAR 13222/2 (85) = ONDUVILLA® Wood Purlin = 5000Pa (290 km/h)

What makes Onduline roofing sheets WIND RESISTANT?

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