All about Cargo Boxes: The most FAQs

Running out of space for your next road trip across the Rockies or family camping adventure in Algonquin? A roof mount cargo box can transform your vehicle’s storage capacity, letting you pack everything you need while maintaining passenger comfort. Whether you’re planning a ski trip to Whistler or a summer getaway to the Maritimes, understanding roof cargo boxes will help you choose the right solution for your adventures.

What is a roof mount cargo box and why use one?

A roof mount cargo box is a weatherproof storage container that attaches to your vehicle’s roof rack system. These aerodynamic boxes provide secure, enclosed storage for gear, luggage, and equipment that won’t fit inside your vehicle. Unlike roof bags or baskets, cargo boxes offer complete weather protection and security, making them ideal for valuable items and extended travel.

The main benefits include freeing up interior space for passengers, protecting gear from Canadian weather conditions, and maintaining better organization compared to cramming everything inside your vehicle. They’re particularly valuable for families, outdoor enthusiasts, and anyone who regularly travels with bulky equipment.

Do I need roof rails or a roof rack system first?

Yes, you’ll need a roof rack system before installing a cargo box. Most vehicles come with roof rails (the long bars running front to back), but you’ll typically need to add crossbars that span across the vehicle. Some vehicles come factory-equipped with crossbars, while others require aftermarket installation.

The roof rack system must be rated for the combined weight of the cargo box and its contents. In Canada, popular roof rack brands like Thule offer vehicle-specific mounting solutions. Professional installation typically costs $200-400 CAD, though many systems are designed for DIY installation.

What size cargo box should I choose?

Cargo boxes typically range from 11 to 21 cubic feet in capacity. Consider both your storage needs and your vehicle’s roof dimensions. Measure your roof length and width to ensure the box won’t overhang excessively or interfere with sunroofs, antennas, or rear hatches.

A 16-18 cubic foot box suits most families and handles gear for week-long trips, while smaller 11-14 cubic foot boxes work well for weekend getaways or smaller vehicles. Larger 19-21 cubic foot boxes are ideal for extended travel or families with significant gear requirements, but remember that size affects fuel economy and handling.

How much weight can a roof cargo box hold?

Most cargo boxes have weight capacities between 75-200 pounds, but your vehicle’s roof load limit is often the limiting factor. Check your owner’s manual for your vehicle’s maximum roof load – typically 100-200 pounds including the rack system and box weight.

Remember that the cargo box itself weighs 30-60 pounds, so factor this into your total. It’s also important to distribute weight evenly and avoid loading the box beyond its capacity, as this can damage both the box and your vehicle’s roof structure.

What should I expect to pay?

Roof cargo boxes range significantly in price depending on size, features, and brand. Budget options start around $300-500 CAD for basic models, while mid-range boxes with better aerodynamics and security features typically cost $500-800 CAD.

Premium boxes with advanced features like dual-side opening, premium locks, and superior weather sealing can range from $800-1,400 CAD. Popular Canadian retailers like Canadian Tire, Costco, and specialty outdoor stores often have seasonal sales, particularly in spring and fall.

How do cargo boxes affect fuel economy?

Expect a 10-20% decrease in fuel efficiency when using a roof cargo box, depending on your driving speed, vehicle type, and box size. The impact is most noticeable at highway speeds due to increased wind resistance. Smaller, more aerodynamic boxes minimize this effect.

On long Canadian road trips, budget for the additional fuel costs. Removing the box when not needed helps restore normal fuel economy. Some drivers find that despite the fuel penalty, the convenience and safety benefits make cargo boxes worthwhile for extended travel.

Are roof cargo boxes secure and weatherproof?

Quality cargo boxes offer excellent weather protection with rubber seals and secure latching mechanisms. Most include integrated locks to deter theft, though determined thieves can still access contents. For valuable items, consider additional security measures or avoid leaving the box unattended for extended periods.

Canadian weather conditions – from prairie hailstorms to coastal rain – make weatherproofing crucial. Look for boxes with proven weather seals and positive customer reviews regarding water resistance. Even weatherproof boxes benefit from organizing contents in waterproof bags for added protection.

How do I install and load a cargo box safely?

Installation involves mounting the box to your crossbars using the provided clamps or mounting hardware. Follow manufacturer instructions carefully and ensure all mounting points are secure. Most boxes include installation guides with torque specifications.

When loading, distribute weight evenly and place heavier items toward the center and front of the box. Secure loose items inside to prevent shifting during travel. Many experienced users recommend loading the box at ground level when possible, then lifting it onto the vehicle.

Can I use a cargo box year-round?

Absolutely! Cargo boxes excel in Canadian conditions, from summer camping gear to winter ski equipment. However, consider seasonal factors like ice buildup on mounting hardware and the additional challenge of accessing the box in winter conditions.

Some users remove boxes during harsh winter months when not needed, both to improve fuel economy and reduce wear from road salt and ice. Regular cleaning and maintenance help extend box life in Canadian climates.

What maintenance do cargo boxes require?

Maintenance is minimal but important for longevity. Regularly clean the box with mild soap and water, paying attention to seals and hinges. Lubricate locks and moving parts annually, and inspect mounting hardware for tightness and wear.

Store the box in a dry location when not in use, and avoid prolonged exposure to extreme temperatures when empty. Check seals periodically and replace if cracked or damaged to maintain weatherproofing.

Any tips for first-time users?

Start with shorter trips to get comfortable with the changed vehicle dynamics – you’ll notice increased wind noise and slightly different handling. Remember the added height when entering parkades or drive-throughs, and allow extra space for turns and lane changes.

Pack strategically with frequently needed items easily accessible, and always double-check that the box is properly closed and locked before driving. Consider practicing loading and unloading at home before your first major trip.

A quality roof cargo box opens up new possibilities for Canadian adventures, from coast-to-coast road trips to family camping expeditions. With proper selection and use, you’ll wonder how you ever managed without the extra space and organization it provides.