Can a Motorhome Blow Over? Understanding High-Sided Vehicle Risks

Owners are justified in being concerned about a motorhome blowing over in strong winds. With their considerable height and large surface area, these high sided vehicles face unique stability challenges. This article examines the risks of wind-related incidents, explains factors influencing stability, and provides practical driving strategies to enhance safety in challenging weather.

What Makes Motorhomes Vulnerable to Wind?

Motorhomes have a large vertical surface that catches crosswinds with considerable force. This surface area, combined with the height at which the force is applied, creates leverage against the vehicle’s stability.

The typical motorhome stands 2.8-3.5 metres tall with a narrow track width of about 2-2.4 metres. This height-to-width ratio creates a less stable profile than lower vehicles. Strong crosswinds generate lateral force above the centre of gravity, creating a powerful tipping moment.

Weight distribution plays a role in stability. Some motorhomes carry substantial weight up high, including roof storage, air conditioning units, and solar panels, raising the centre of gravity and increasing tipping susceptibility.

Are High-Sided Vehicles Like Motorhomes Really at Risk of Blowing Over?

Yes, motorhomes can blow over, although complete tip-overs are relatively rare under normal driving conditions.

What Wind Speeds Are Dangerous for Motorhomes?

Wind becomes a serious concern at different speeds:

• 30-40 mph (Force 7) – Noticeably affects handling and requires increased concentration
• 40-50 mph (Force 8-9) – Potentially dangerous with significant steering correction required
• 50+ mph (Force 10+) – Extremely hazardous with high risk of loss of control or tip-over
• Gusting conditions – Often more dangerous than steady winds of the same speed
• Highway warnings – Typically appear at 35-45 mph, signalling increased handling difficulty

Most tip-over incidents occur in winds exceeding 50 mph, especially during gusts. However, even lower wind speeds can cause dangerous handling situations that may lead to accidents without necessarily tipping the vehicle.

How Does Motorhome Design Affect Wind Vulnerability?

Not all motorhomes face the same level of wind risk. Design features greatly influence stability.

A-class motorhomes will have a larger, more vertical front than low-profile or van conversion models, catching more crosswind. Height-to-width ratio remains critical – narrower, taller motorhomes experience more instability than wider models of the same height.

Weight distribution varies between manufacturers. Some premium motorhomes incorporate features specifically addressing wind stability, including:

1. Lower-mounted water tanks to reduce the centre of gravity.
2. Strategically placed heavy components.
3. Wider track chassis design.
4. Advanced suspension systems that resist body roll.
5. Aerodynamic profiling to reduce wind resistance.

Consider these design elements if you travel in windy regions.

Which Situations Create the Highest Risk?

The following scenarios create especially dangerous conditions:

• Weather fronts – Areas where weather systems meet create stronger winds
• Coastal regions – Sea breezes generate substantial wind forces, especially in the afternoons
• Mountain passes – Wind acceleration through geographical features creates high-wind zones
• Bridge crossings – Exposed structures with winds from multiple directions
• Open plains – Lack of natural windbreaks allows winds to reach full force
• Large vehicle turbulence – Created when overtaking or being overtaken by lorries

The combination of rain and wind is especially challenging. Wet roads reduce tyre grip precisely when maximum traction is needed to counteract lateral forces. Sudden gusts are more dangerous than steady winds, and drivers have little time to correct them. When planning journeys, pay particular attention to gust forecasts.

How Can You Prepare Your Motorhome for Windy Conditions?

Before setting out in potentially windy conditions:

1. Check detailed wind forecasts from multiple reliable sources.
2. Plan routes avoiding exposed areas like coastal roads and high bridges.
3. Time journeys to avoid peak wind periods.
4. Secure all external items, including awnings and bike racks.
5. Distribute weight low with balanced left-right loading.
6. Remove roof boxes when possible to reduce vulnerability.
7. Check tyre pressures for better stability.

Keep heavy items low and centred, and secure storage compartments to prevent shifts during travel or when in traffic.

What Should You Do If Caught Driving in Strong Winds?

If you encounter unexpected strong winds:

• Reduce speed significantly to gain reaction time and reduce wind force
• Grip the steering wheel firmly in preparation for sudden gusts
• Increase following distance from all vehicles
• Stay alert for wind direction changes when passing gaps in barriers
• Consider pulling over in severe conditions
• Use smooth, progressive controls rather than sudden inputs
• Position strategically within your lane when safe

Avoid overcorrection, which leads to swerving. Make measured adjustments that maintain your path without creating instability.

How Does Insurance Cover Wind-Related Incidents?

Most motorhome insurance covers accidental damage from wind, including tip-overs and collisions caused by gusts. However, cover details vary between insurers.

Driving against official weather warnings might affect claims in some cases. When severe alerts mention high-sided vehicle risks, continuing your journey could be considered contributory negligence.

Additionally, unsecured items causing damage during wind events might not be covered if improperly stowed. Regular maintenance, ensuring proper functioning of suspension components, helps establish that you’ve taken reasonable precautions.

How We Help Motorhome Owners Address Wind Risks

At Advance Insurance, we work with leading UK insurers who provide cover for weather-related incidents. Unlike general vehicle brokers, we understand high-sided vehicle vulnerabilities and can identify providers offering appropriate protection.

Policies typically include accidental damage cover for wind-related incidents without unreasonable exclusions. Our team can provide practical guidance about risk management techniques that enhance safety and satisfy insurers’ requirements.

Contact us today to discuss your high-sided caravan insurance needs.