Ask the expert: Thule answers your roof box FAQs

In most cases, yes. Most modern cars can be fitted with a roof box, but it's important to choose one that's compatible with your vehicle.

Before buying a roof box, you'll need to check:

• Your vehicle's roof type
• Your vehicle's maximum roof load limit
• The roof bars and fittings required for your car

It's also important to remember that your roof load limit includes the combined weight of:

• The roof bars
• The roof box
• Everything packed inside the roof box

For example, while a roof box may be capable of carrying up to 75kg, your vehicle's roof may have a lower load limit. Always follow your vehicle manufacturer's recommended limit

If you're unsure which roof box is right for your car, use the Halfords registration checker to find compatible roof bars, fitting kits and roof boxes for your specific vehicle

Yes. Roof bars are required to fit a roof box safely and securely.

Roof bars create the connection between your vehicle and the roof box, making them an essential part of the system.

The type of roof bars you'll need depends on your vehicle. Cars can have:

• Raised rails
• Flush rails
• Fixed mounting points
• A bare roof

Because every vehicle is different, it's important to choose the correct roof bar system for your car.

You'll also need to make sure your chosen roof bars are compatible with your roof box and that the total weight of the bars, box and luggage doesn't exceed your vehicle's roof load limit.

Many modern roof box systems are designed to be quick and straightforward to install. For example, selected Thule roof boxes feature the PowerClick mounting system, which provides an audible click to confirm that the roof box has been securely attached.

Not usually.

If you choose a roof box that's suitable for your vehicle and fit it correctly, you should still be able to open your boot normally.

The key is positioning the roof box correctly on the roof bars. It needs to sit far enough forward to allow the tailgate to open, while remaining securely fitted.

Many modern roof boxes are designed with this in mind. For example, the Thule Motion 3 range is engineered to help maintain access to your boot when installed correctly.

However, every vehicle is different, particularly SUVs and cars with larger tailgates. Before purchasing, it's always worth checking compatibility to ensure you get the best fit for your vehicle.

Yes. A roof box can affect fuel consumption because it creates additional wind resistance.

As a result, your engine has to work a little harder, particularly when driving at higher speeds such as on motorways.

The overall impact will depend on several factors, including:

• The size of the roof box
• How heavily it's packed
• The type of vehicle you're driving
• Your driving speed

Modern roof boxes are designed to be as aerodynamic as possible. For example, the Thule Motion 3 features a streamlined shape designed to help reduce drag and improve efficiency on the road.

If you're not using your roof box, removing it can help maximise fuel efficiency.

While you can leave a roof box fitted all year round, it's generally best to remove it when it's not in use.

Keeping a roof box on your vehicle permanently can:

• Increase wind resistance
• Affect fuel economy
• Create additional wind noise
• Increase the overall height of your vehicle

A taller vehicle means you'll need to take extra care when entering:

• Car parks
• Garages
• Areas with height restrictions

Removing your roof box when it's not needed may also help extend its lifespan. Continuous exposure to the elements can cause wear and tear over time.

For most drivers, the best approach is to fit a roof box when extra storage space is needed, then remove and store it safely afterwards.

Whether you're heading off on a family holiday, transporting camping equipment or simply need more space for your next adventure, there's a roof box to suit your needs.

Explore our range of Thule roof boxes, roof bars and accessories online or visit your local Halfords store for expert advice on finding the right setup for your vehicle.