Roof boxes can potentially damage your car if not installed properly or if they exceed the recommended weight limit, causing strain on the roof. Regular checks, proper installation, and adhering to weight limits can help prevent such damage.
This question circled in many car owners’ minds – do roof boxes damage the car? Shortly, yes! It can severely damage your car if you fail to install it correctly. Therefore, a severe accident might occur. The possibility of such an incident increases if you carry heavy items on the product. Heavy items on the box, and you’re driving the car at the highest speed on a rainy day!
It’s a potential scenario for an accident! Sad but true! Before taking things on a box, ensure that it is highly secured and mounted correctly on the vehicle’s rooftop. Otherwise, things could go wrong and ultimately cost you a lot of money.
Do Roof Boxes Damage Your Car?
It’s a big question, and people seek a proper answer to it. The answer is yes. A roof box can badly damage a car if it isn’t installed firmly. A powerful twisting force might join between the roof box and its nut bolts. As a result, the car can lose its stability and standard power. This could result in a severe accident when you’re on a road journey.
Everyone will surely want to avoid such a scenario. For this reason, it is essential to install the roof box perfectly. So, you don’t have to deal with the roof box. This is how you can avoid any serious injury.
You can check this article, “How to install a roof box in a car” to learn the procedure of installing a roof box in your car.
Steps to Take While Using a Roof Box

Yes, your car contains a roof box placed at the top of the roof. But does that mean you will install it and go?! Nope! You need to do some extra job. Otherwise, the lifespan of the roof box will get shorter. Let’s take the steps –
Read the Setting Manual
When you buy a new product, especially an expensive thing like a roof box, you must check the manual given by the manufacturing company. Thus, you need to do the task according to their guidelines. This is how you can ensure the path of safety and security.
You could face a challenge when installing the roof box for the first time. As a result, there’s a chance things could go wrong. But, you can escape any contravention effortlessly.
Take the Professional’s Help
You could face a challenge when it is the first time in the installation process. Therefore, a wrong move can happen. To avoid it, you should take help from a professional. This is how you can avoid any big mistake.
Lubricate on a Regular Basis
It’s easy to surmise that the product can get worn out. Since the box stays on the rooftop, it has to fight against adverse weather conditions like rain, snow, etc. That’s the reason the corrosion on the box might happen. Due to this, it can lose its supremacy and begin to wear down fast.
For this reason, you should use lubricant regularly to prevent it from being worn out. Moreover, this is how you can protect this expensive product from corrosion and rust.
Remove the Box Until You Need it
There’s no need to put the box on the car’s rooftop when you’re not using it. The reason is it could badly affect the exhaustion of the fuel. Yes, the roof box is made of lightweight elements and manufacturing companies always try to use soft materials during the production; the roof box still can significantly impact fuel spending.
For this reason, you should remove it. Further, removing it without necessity keeps the vehicle’s roof top steady. In addition, it also assists in decreasing the noise of the wind.
Check out the Weight
This is a highly crucial matter. Before putting your personal belongings in the roof box, you have to check the manual to discover the weight limit of the product. Afterward, put all the things according to the weight limit. Don’t overload the roof box. Otherwise, things could go wrong.
If you don’t check the weight limit, your car and other people’s cars will be in danger. The reason is that the box and its belongings can fall off in extremely windy weather while driving the vehicle. Therefore, don’t neglect it and check out the weight carefully.
Don’t Overspeed the Vehicle
Yes, you must drive the car with the roof box on the top. But, don’t cross the speed limit while you’re in motion. Always maintain the required speed limit. Hence, if you cross the limit, both you and other people could face danger. For instance, you’re driving your car at the highest speed.
Suddenly you need to turn the car. What would happen? You have to turn the steering wheel so fast. As a result, the roof box can fall into the road. After that, your car and other peoples’ cars could be damaged badly. Even the possibility of an accident can’t be ruled out. So, be careful and stay safe!
Do Roof Boxes Damage Your Car? FAQs

Why do I need a roof box?
If you’re a frequent traveler and regularly go outdoors, you need a roof box. Sometimes, your car’s trunk might not contain enough space? What then? You need a box to carry the extra belongings. It saves the space within the car’s trunk and makes the journey more comfortable.
What types of damage can a roof box do to a car?
If you fail to install the box correctly in the vehicle, there’s a big chance that the roof box can cause severe damage to your car. For instance, it can scratch the color of the rooftop. Further, heavyweight products can wear and tear the paintwork of the car. Sometimes, overloading and wrong installing can turn into an accident.
Can a roof box impact on a car’s MPG?
Of course, it can. If you add more weight to it, the aerodynamics of the box can’t do the job correctly. As a result, the drag increases steadily, resulting in more gas mileage.
Does the box spend more fuel?
Yes, it is. The box carries more weight. For this reason, the final weight of the vehicle also increases. Therefore, the amount of fuel also inflates.
Final Say
So, we’re at the end of our discussion. We hope you’ve got enough knowledge on how the roof boxes damage the car? You need to be careful about that. This is the only way you could eliminate the chances of damaging the car. Install it correctly and follow the other guidelines provided by us.
Now, do you have any questions regarding our article? You can question it in the box below.
Best Seller List of Roof Cargo Boxes:

- 18 cubic foot (510 L) internal cargo capacity
- Made from durable UV-resistant ABS material
- Rear opening for easy access away from traffic
- Tool-free mounting hardware for easy installation and removal
- Includes key and lock to secure contents in the box, and the box to your rack
- Fits SportRack Rack Systems, square bars, round bars and most factory racks (check fit guide)
- Dimensions (LxWxH): 63 x 38 x 19 in / 160 x 96.5 x 48 cm
- Min-Max Crossbars Spacing: 23 5/8 - 29 3/4 in (60 - 75.5 cm)
- Max Weight Capacity: 100 pounds (45 kg)

- Secure & protect your gear in this 18 cubic ft. HDPE plastic hard shell vehicle cargo carrier; high-capacity interior dimensions 57 L x 38 1/2 W x 17 3/4 H inches; aerodynamic design for fuel efficiency
- Weatherproof storage for your luggage with a four corner locking system, front latch, and weather-tight seal for ultimate car rooftop protection and security
- Easy & convenient loading and unloading from either side of the car make for smooth travel and hassle-free storage
- No tools required, easy assembly and installation. All mounting hardware and simple instructions are included to get you safely on the road quickly. The base is pre-drilled for 24in crossbar spacing - if your vehicles crossbars are NOT adjustable the plastic base can be re-drilled to match your vehicle (20in to 30in bar spacing)
- Made in USA, limited lifetime guarantee. The JEGS car top carrier’s high-quality construction and performance give you peace of mind
- Comfortably Holds 3 golf bags, up to 5 if stacked depending on size.

- Functional rooftop cargo box provides 14 cubic feet of additional packing space
- Rugged and durable design keep contents protected
- FastGrip quick-mount system assembles in minutes
- Passenger-side opening for easy loading and unloading
- Central Locking system provides maximum safety
- Thule Comfort Key can only be removed when all locking points are securely closed
- Fits 3-5 snowboards (max length: 155 cm)
- External dimensions: 67 x 35 x 16 inches; Internal dimensions: 61 x 33 x 14 inches
- Load capacity: 110 lbs; Product weight: 34 lbs
- Height off crossbar: 16 inches. Fast and secure mounting

- 【UNIVERSAL】This extra long rooftop cargo carrier fits for vehicles with cross bars only, no tool assembly & installation. Increases vehicle cargo space without impeding on passenger comfort.
- 【LARGE CAPACITY】Rooftop cargo box provides 11 cubic feet of additional storage space. The maximum storage capacity of 110lbs when evenly distributed. And it can be opened up to 14" wide to store bulky items.
- 【ROBUST DESIGN】Constructed of rugged, impact-resistant ABS material for long-lasting durability, able to protect your contents from exposure to the inclement weather.
- 【SECURITY LOCKING SYSTEM】Includes key and lock to secure valuables in the box, to ensure cargo safety and s proper lid alignment. It can open from the side and stays open til you close it.
- 【SPECIFICATION】Size: 11 Cubic Feet Internal Storage, 110lbs Max Capacity | Overall Dimensions: 53" L x 34" W x 15" H | Surface Finish: Black Texture Finish

- Perfect for Road Trip: Take the cargo box to the park, the beach, the sports field, or any place you need to store. Works on all vehicles with rack, suitable for cars, vans, SUVs, etc. Sleek aerodynamic design to reduce drag and has less noise.
- High Quality Material: The roof box is manufactured from sturdy ABS and PMMA material for long-lasting use, able to protect your valuables from exposure to the elements and can load 130 lbs capacity, suitable for round, square, factory and most aerodynamic bars.
- 16 Cubic Feet Cargo Box with Car Trunk Organizer---With the large capacity, the roof cargo box can help you securely carry 16 cubic feet worth of essentials, can increase vehicle cargo space without impeding on passenger comfort, more capacity, more pleasure!
- Secure & Convenient Use: In order to keep your belongings secure, this vehicle cargo carrier is designed with the security lock that has keys. More importantly, Dual-sided opening for easy access on either side of your vehicle to increase efficiency and convenience.
- Easy to Install: With equipped hardware and detailed instruction, the car rooftop cargo carrier is easy to be mounted to the car top. Then you can start a hassle-free trip with your family and friends to appreciate the wonderful scenery along the way.

- Secure Travel Solution:Travel with confidence using our rooftop cargo box, designed with safety in mind. It comes with two keys and straps to keep your belongings secure during your journey. Whether you're going on a weekend getaway or a long road trip, you can rest easy knowing your luggage is protected from theft.
- Easy Installation:Our rooftop cargo box offers a hassle-free installation process, complete with all the necessary components and simple instructions. Spend less time setting it up and more time enjoying your adventures. It’s perfect for those who want convenience without sacrificing quality.
- Aerodynamic Design:Enjoy a smoother ride with our cargo box, engineered with an aerodynamic shape that reduces wind resistance. This innovative design not only improves your vehicle's fuel efficiency but also minimizes noise, making your travels more enjoyable. Say goodbye to drag and hello to effortless journeys!
- Spacious Storage Capacity:Maximize your travel potential with a generous 12 cubic feet of storage space. Our rooftop cargo box can comfortably hold up to 165 lbs of gear, providing ample room for everything you need on your adventures. It’s perfect for families, outdoor enthusiasts, or anyone who needs extra storage on the go!
- Versatile Compatibility:Designed to fit a wide variety of vehicles, including cars and SUVs, our rooftop cargo box is the best travel companion. Just check your roof rack compatibility before purchasing to ensure a perfect fit. Enjoy the added storage, no matter what type of vehicle you drive!

- 【840D CHAMPION QUALITY MATERIAL】 Made with heavy-duty 840D abrasion-resistant PVC fabric, this ultra-durable car roof cargo carrier stands up to any rough treatment or harsh weather. Better still, the triple-reinforced welded seams make it hard to tear or rip for years to come.
- 【MORE THAN WATERPROOF】 Featuring waterproof zipper wrapped with 6 inches widened velcro zipper flaps, our vehicle cargo carriers will exceed your expectations with the waterproof effet. The reinforced seams will make it possible "zero leakage" even in downpours.
- 【EASY INSTALLATION】 Our roof rack cargo carrier comes with an anti-slip mat and 8 thickened adjustable straps that will keep the cargo bag in place. The smooth zipper, adjustable straps, door hooks and robust buckles allows you to effortlessly secure it to any car.
- 【SECURE FIT & LARGE CAPACITY】 Our 21 cubic feet rooftop cargo bag is compatible with vehicles with our without roof rack, the large capacity can keep the shape nicely, even when holding many luggage cases, blanket, tents, sleeping bags and more.
- 【PACKAGE LIST】You will receive 1x roof top carrier bag, 1x storage bag, 1x anti-slip mat, 6x door hooks, 2x extra luggage straps, 1x luggage lock.

- ▶️ This roof top storage box is universal fit for mounting to max 13 inches wide cross bar, please check the dimension before purchase.
- ▶️ The package comes with [1] 53 inches length storage box, [2] security lock key, and [4] heavy duty tool free installation mounting brackets.
- ▶️ It is constructed of rugged, impact-resistant ABS material to ensure a long lasting life in outdoor conditions. More, it can open from the side and stay open till you close it with the strong support arm.
- ▶️ Opens on the passenger side to 14 inches wide to store bulky items from the side and stays open till you close it, and it is very easy to install without any tool required to assembly.
- ▶️ Overall Dimensions: 53" L x 34" W x 15" H | Capacity: 11 Cubic Feet and up to 110 LBS

- This car roof box is manufactured from sturdy ABS and PMMA material for long-lasting use and shiny, able to protect your valuables from exposure to the elements and can load 130 lbs capacity, suitable for round, square and most aerodynamic bars.
- It is constructed of rugged, impact-resistant ABS material to ensure a long lasting life in outdoor conditions. More, it can open from the side and stay open till you close it with the strong support arm.
- Overall Dimensions: 55.91" L x 29.53" W x 14.96" H, Capacity: 13 Cubic Feet volume and holds up to 130 lbs
- Opens on the passenger side to 13inches wide to store bulky items from the side and stays open till you close it, and it is very easy to install without any tool required to assembly.
- Double side opening for easy loading and unloading,Key can only be removed when all locking points are securely closed

- LARGE STORAGE CAPACITY: The Car Rooftop Cargo box offers 10 cubic feet of storage capacity, making it a perfect choice for carrying bulky items like luggage, camping gear, & sports equipment. Vehicle topper luggage carrier helps to free up valuable space inside your vehicle for passengers & other essentials. Whether you're going on a leisure trip or a work-related one, DuraLiner rooftop cargo box has enough room to hold all your necessary items.
- WATERTIGHT AND LOCKABLE: The DuraLiner rooftop box is crafted to fit most roof racks with ease and is simple to install and remove. The hardshell rooftop cargo carrier is made from durable materials, enabling it to withstand harsh weather conditions & rugged terrains. Duraliner roof carrier is watertight & lockable, ensuring your belongings stay protected from water damage.
- STURDY MATERIAL: Heavy-duty plastic resists UV damage and maintains a rich finish to protect your belongings from weather. The Cargo Box has a sturdy and long-lasting construction made possible by High-density polyethylene (HDPE), which can withstand harsh environmental conditions.
- EASY INSTALLATION: DuraLiner Cargo Boxes are simple and easy to install. The tool-free assembly and U-bolt securing feature make it a quick process, allowing you to hit the road in minutes. These cargo boxes can be mounted with ease onto most vehicles with a roof rack. Vehicle Cargo Carrier design features a sealed lip, two sided entry and a front and rear latching system to ensure the safety and dryness of your belongings.
- COMPATIBLE WITH MOST VEHICLES: Car roof cargo carrier is compatible with numerous vehicle makes and models, including Chevrolet, Ford, Isuzu, Jeep, Mazda, Mercedes, Mitsubishi, Nissan, Sprinter, Toyota, and more. Its universal mounting system is adaptable to various roof rack systems, making it a convenient option for customers with different car brands. The Rooftop cargo is specifically designed to fit and function with the roof racks or crossbars of these particular car models.
Last Update : 2025-05-03