a car with roof box on it

Roof boxes are specially made to be fitted on top of your car and they carry various items, but often they are loud and noisy items. If there is a complaint that you will hear from the roof box owner it’s about the annoying noise it at times makes.

The noises may be as a result of many things but majorly they are a result of loose and poorly fitted roof racks. This problem is worse on the older square and round bars, but also the new profiled bars suffer the same problem.

If you mean to travel for a short distance, the noise may not be such a bother as much as on long-distance travel the noise may be much more than a nuisance. This can also be frustrating as it dictates that there is a problem somewhere.

There question here is “how do I stop my roof box from making noise?” after getting to hear the noise from the roof box, you want to get a solution for it. Worry no more because we got you!

This article will walk through some tips you can use to curb the noisy roof box dilemma. These suggestions will help solve the logical problems that lead to noises.

Understand the parts of the roof box

Getting to know the parts of the roof box and how they are attached helps understand how roof box noise occurs. By understanding where the noise comes from it is easy to find the solution to the problem. They are various parts of a roof box as follows:

  • The fit kit

If you have a flush roof that does not come with a built-in roof rack, you will have to purchase one. Though it is not necessary if your car already has these items. You should also know that they are specific to a car model and not universal.

  • The towers

They are attached to the fit kit and they are universal. They ensure your equipment does not fly all over when you are driving.

  • The crossbars

The crossbars join everything together, they can be circular, aero, or square. They vary in prices depending on the shapes. The square bars are less expensive but they make a lot of noise because they are not aerodynamic.

The aero bars are the best although they are the most expensive, less noisy, better fuel efficiency and they are more attractive.

  • The connectors

They are of two types depending on your preference:

  • T-track adapters

These adapters spread your load and therefore, helps cut back on noise. They are mostly used with aero crossbars and they look sleek.

  • U-bolts

They are universal and can be used with all types of roof boxes. They are not usable with aero bars and they can sometimes scratch bars made of softer aluminum.

What makes the roof boxes noisy?

The roof boxes are mostly noisy when one is traveling at a high speed. The noise is due to the gaps that might have been left between the bars and the base, when the wind goes through these gaps it results in whistling noises that at times may be quiet loud.

Most of the noise is produced by the roof rack. They are a few tricks to reduce roof rack noises listed below:

  • Disrupt the airflow

You could do this by using a rope, wrapping it around the crossbar in the front. Then, wrap it around the length of the bar to the end. This will disrupt the airflow thus reducing the whistling sound.

  • Reposition your rack

This won’t offer a permanent solution but will make the problem a little more bearable. You can move the crossbars forward or backward.

  • Use an airfoil

Using airfoils on the crossbars creates a smoother airflow thus reducing the whistling noises. Getting the best airfoils will go a long way in ensuring your problems are solved. They are pretty cheap!

  • Use a fairing

The fairing is part you add to your car to reduce the drag effect and make the car go faster. This is expensive but it is the most effective solution. Not only does it streamline the car but also makes it more fuel-efficient.

  • Use edge bars

This is a solution that is normally overlooked by people when they are trying to fix the noisy boxes. If you are not dealing with large and heavy loads it is better to go for the edge bars rather than the load bars.

The load bars have some additional surface area, which produces the noise as you drive especially when if it extends past the rack’s tower.

  • DIY roof rack wind deflector

If you do not want to go out of your budget and incur extra costs trying to solve this problem. There is a quick fix that may stop the noise. You will use a bungee cord to diffuse the wind that hits the rack.

Wrap the bungee cord in a tight spiral around the crossbars, attaching the cord at the end of both crossbars. The length of the cord should be directly proportional to the length of your crossbars.

What to do to reduce Roof Box Noise

After ensuring that your roof rack system is properly secured and your roof box is still making noise, they are few things you can check and change to eliminate the annoying noises.

First, you need to ensure that the roof box is also secured in the right way. If it is properly fixed you can try the following suggestions:

  • Ensure your luggage is properly secured

If your luggage is secured incorrectly, they could be the cause of the noise as they keep wobbling as you drive. In cases where you carrying bikes, you could adjust the straps and mounting points so that the items are held tightly. The luggage could also be secured using zip ties or cords to ensure they are tight and more firm.

  • Check the base rack

The base rack should also be checked as it goes between the car and gear. You could check it by pulling the side of the crossbar to side, it gives an idea of how secured the rack is. In case it is not well secure, tie-down your mounts or straps to get the rack where it needs to be.

  • Check the contact points

You should check your contact points to determine whether they might be rubbing against the surface of your car. You can strip these points to combat the problem. Stripping helps protect the surface of the car.

Wrapping up 

All the above are great ways to reduce the noise you hear as you drive and have a roof box on the top of your car. Most of the suggestions discussed above involve making sure everything is properly secured so that there no chances of air moving through it.

The suggestions should ensure you get your roof box back! Less noisy and more comfortable.

If you cannot solve the problem, you can always take your vehicle to a dealer so that they can professionally handle the issue and ensure that your gear and your roof box are as quiet as possible.

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