RoofBag Car Top Carriers
Frequent Questions

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A roof rack consists of hardware permanently installed on the roof of a car and intended for fastening hard or soft luggage carriers.

Roof racks consist of either side rails (running front-to-back along the sides of the car), cross bars (running side-to-side across the width of the car), or both.

Some roof racks include a metal basket, while others are specialized for fastening bicycles, kayaks, etc.

A car top carrier is a closed bag or box that rides on the roof of the car and allows carrying cargo on the roof of the car.

Hard car top carriers are rigid plastic boxes that require a roof rack and metal hardware, special risers and tools to attach to the rack. They are waterproof, durable and keep their aerodynamic shape when empty.

But they are expensive, heavy, difficult to install and remove, and difficult to store. They are also noisy, because of the turbulence that forms in the space between the roof and the box.

Soft car top carriers are large bags that fasten with straps to a roof rack. They are easy to install and remove, economical, and easy to store. On the downside, some are not durable or waterproof.

RoofBag car top carriers have been perfected over 16 years and are durable and waterproof.

Additionally, RoofBag's unique design allows fastening to a roof rack (if the car has a roof rack) or to the roof and door frame of the car (if the car has no roof rack).

And because the RoofBag carrier is in contact with the roof and has an aerodynamic shape, it is quieter than a hard roof top carrier.

The RoofBag Cross Country is the most waterproof soft car top luggage carrier in the market. The fabric used to make the RoofBag carrier is coated with a heavy layer of vinyl on each side, which makes this fabric 100% waterproof.

All the joints are electrically sealed, not sewn, making the joints fully waterproof. A 2-inch double-thickness zipper flap covers the zipper. The zipper tape is polyurethane coated, which makes it waterproof.

Our carriers have been tested successfully under the most extreme weather conditions, and countless customers have confirmed that our car top carriers are not only waterproof, but also snow-proof and dust-proof (see Car Top Carrier Reviews and Testimonials).

However, water can enter the carrier through the zipper if the zipper is not closed all the way or if the zipper flap is not pointing down all the way around.

PRECAUTIONS TO AVOID WATER ENTRY

    - Install the RoofBag carrier with the logo toward the rear of the car.

    - Close the 2 zipper sliders all the way until they touch at the rear of the carrier.

    - Use the carrier full or almost full whenever possible. This forces the zipper flap to point down and cover the zipper.

    - When using a half-empty carrier, fasten the straps so that the zipper flap points down all the way around.

With proper installation, water cannot enter the carrier under any storm conditions.

We designed the fabric for Roofbag car top carriers to provide maximum protection from the elements:

• Will not rip or tear: 480 pounds resistance without tearing.

• Will not weaken or fade: blocks the sun's damaging UV rays.

• Will not get damaged in extreme heat or cold: can withstand heat up to + 250° F and cold down to - 40° F.

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DIMENSIONS:

    - Size 13: 37 inches wide x 40 inches long.

    - Size 17: 38 inches wide x 48 inches long.

    - Height of both carriers is approximately 10 to 13 inches at the front and 17 to 18 inches at the back.

    - The width is measured side-to-side and the length front-to-back.

You can find more dimensional details on this page: RoofBag Car Top Carrier Dimensions.

Front-to-back, the strap guides are separated by 22" in the RoofBag carrier size 13, and by 31" in the RoofBag carrier size 17.

Side-to-side, the strap guides are separated by 19" in the RoofBag carrier size 13, and by 22" in the RoofBag carrier size 17.

You can find more dimensional details on this page: RoofBag Car Top Carrier Dimensions

A RoofBag carrier size 13 weighs about 8 lbs, and size 17 weighs about 9 lbs.

We fold each RoofBag carrier meticulously so that we can ship it in a small box. We ship the RoofBag size 13 in a box 14" x 12" x 6", and the RoofBag size 17 in a box 16" x 12" x 6".

Since the RoofBag carrier is flexible, the weight limit is really determined by the roof of the car and not by the RoofBag carrier. We have heard that customers carry 100 lbs, or even 150 lbs of cargo in the carrier without a problem.

As long as the weight is distributed over a wide area of the roof, the normal weight of items that people normally carry in luggage bags like clothes, camping gear, etc. does not cause any damage to the roof of a car.

A RoofBag carrier size 13 holds 13 cubic feet of contents, which is the equivalent of 3 medium-sized suitcases.

A RoofBag carrier size 17 holds 17 cubic feet of contents, which is the equivalent of 4 medium-sized suitcases.

It is possible to place suitcases inside the RoofBag luggage carrier. However, you will use the space inside the carrier more efficiently if you place the items in the carrier directly, without the suitcases.

If you carry suitcases in the RoofBag carrier, cushion the interior points of contact between the hard edges of the suitcases and the fabric of the RoofBag carrier with towels or blankets to avoid damage to the fabric of the carrier.

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You can find a sizing guide on the Sizing Info page: Car Top Carrier Sizing Guide, which includes a list of car models and the recommended carrier size for each.

In general, size 13 cu ft is recommended for most sedans, and for small SUVs. Large sedans, mid-sized SUVs, vans and station wagons can use either size 13 cu ft or size 17 cu ft.

If you don't think you will need the extra space of a size 15, you may be better off choosing size 11, as a full RoofBag carrier rides quieter than a half-full carrier

If you need as much storage space possible, then choose size 17. But if you don't think you'll need the all the storage space of a size 17, you may be better off using size 13.

A full RoofBag carrier works better than a half-full carrier: quieter ride and better fuel efficiency. In addition, a full carrier makes the zipper flap point down all around, which protects the zipper from water entry.

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No, RoofBag car top carriers can be fastened securely to a roof rack (if the car has one), or to the roof and door frame of the car (if the car has no roof rack).

1 - PASS-THROUGH STRAPS - A RoofBag car top carrier intended for a car without a roof rack is shipped with 2 Pass-through Straps that fasten the carrier to the door frame of the car. This attachment is secure.

The straps are 1,000 lbs strong, and the buckles are tested to 365 lbs. Additionally, the straps are thin (0.5 mm) and water-repellent to avoid interference with the door seal or water wicking into the car. See installation diagrams for a car without rack using Pass-through Straps.

2 - STRAPS WITH DOOR HOOKS - An alternate installation method for a car without a rack uses the optional Straps with Door Hooks, which attach to a ridge that 70% of cars have on the top section of the door frame.

Straps with Door Hooks need to be ordered separately. See the Car Top Carrier Extra Straps section of the Products Page.

If your car does not have the ridge required for the Door Hooks, or if you are not sure, we recommend using the Pass-through Straps that come standard with the RoofBag carrier when you order a carrier for a car Without Rack. Pass-through straps work on any car.

Yes, the Pass-through Straps fasten the RoofBag carrier to the door frame that is the rigid continuation of the roof, not to the door itself. The doors just close over the straps. So, it doesn't matter if the top of the door is a metal door frame or the glass window.

No, the roof of the car needs to be rigid in order for the RoofBag car top carrier to be securely fastened to it.

The straps with door hooks have the advantage that they don't take away overhead space inside the car as the inside straps do. However, for the Straps with Door Hooks to work properly, the top part of the door frame of the car must have a ridge as described on this page: Car Top Carrier Door Hooks.

If your car does not have this ridge, or if you are not sure, we recommend using the Pass-Through straps that come standard with the RoofBag carrier when you choose a carrier for a car without a roof rack. These straps work on any car.

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The RoofBag carrier can be fastened to any type of roof rack. When you order a RoofBag carrier for a car with rack, we include 2 straps that fasten the carrier to any type of rack: to side rails (straps go left-to-right), or to cross bars (straps go front-to-back). See installation diagrams on the Installation page of our website: Fastening Car Top Carrier to a Roof Rack.

Some side rails don not have slots for the straps to go through and thus are unsuitable for fastening the carrier to them.

Yes, the RoofBag car top carriers are flexible and can be squeezed into a space a few inches smaller than the width of the carrier.

Yes, the RoofBag car top carrier works with cross bars that are close together. If the cross bars are adjustable, it is best to separate them as much as possible. If the RoofBag is still a few inches longer than the separation between the cross bars, the RoofBag carrier can be squeezed in the space available between the cross bars.

If the cross bars are considerably closer together than the length of the RoofBag carrier, the carrier can ride over the rear cross bar. See next question.

Yes, the RoofBag cartop carrier can ride over the cross bars. It is best to first separate the cross bars as much as possible.

The installation is most stable when the front of the RoofBag carrier is right behind the front cross bar. The rear cross bar can be under the carrier. See installation diagrams on the Installation page: Car Top Carrier with Cross Bars.

If both cross bars are under the RoofBag car top carrier, the bag may flap and create noise during travel.

If the car has both cross bars and side rails, we recommend buying an extra set of Straps for Rack, and using one pair left-to-right on the siderails, and the second pair front-to-back on the cross bars.

RoofBag cartop carriers have been installed successfully on cars with sunroof by many customers. We are not aware of any problems resulting from such installations.

We recommend distributing the weight evenly and using good judgment when deciding the amount of weight placed on the sunroof. If in doubt, please consult the car manufacturer.

The RoofBag carriers for cars with roof rack or for cars without roof rack are the same. The only difference is the installation of straps.

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If you order Monday through Friday before 3 PM California time, your order is guaranteed to be shipped today. This means you can have your RoofBag car top carrier as early as tomorrow morning, if you choose next-day delivery.

We offer shipping options ranging from next day service to ground service. Ground service takes between 1 and 5 business days, depending on your location.

You can see all the shipping options available, along with cost and arrival dates by entering your zip code in the small box in the Shopping Cart, which is visible on each page of our website.

The Arrival Date is a best estimate provided by the shipping company. These estimates are accurate 98% of the time. We cannot guarantee that your package will arrive on the estimated arrival date, since about 2% of the time, the shipping company delivers a package late for reasons ranging from bad weather to overflow of their system in busy season.

If shipping company delivers a package late and you decide to return the package, we will refund the value of the items purchased, but we can refund the shipping cost only if you have chosen a guaranteed service and the shipping company has issued a refund. (See below for list of guaranteed services).

Even with guaranteed services, the shipping companies will not issue a refund if the delay was due to bad weather, system overflow or a faulty address.

We only sell online, through our dedicated and secure RoofBag.com website. We ship the same day you order (if you place your order before 2:45 pm PST), and we offer a variety of shipping options, including next day delivery service. Thus, you could have your carrier tomorrow!

By selling online, directly to the customer, we avoid the extra cost of distributors and dealers. We pass these savings on to our customers, which is why our prices are so reasonable.

Not only can you buy a top-quality car top carrier at a very affordable price, but when you order online, your purchase is fast, encrypted and secure, and on top of that, you don't pay sales tax if you purchase from outside California.

Each RoofBag car top carrier is shipped with 2 straps.


The carrier and the straps are basically all you need to fasten the carrier securely to the car.

However, we strongly recommend the Protective Mat, an accessory that keeps the carrier from moving during travel and protects the roof of the car from being scratched or marred by the carrier.

Extra straps can also be purchased for extra attachment strength.

Other accessories provide added convenience, such as the Duffle Bags, Padlock, Tire Step, Travel Blanket and Storage Pouch.

We strongly recommend purchasing the optional Protective Mat, which keeps the RoofBag car top carrier stable on the roof without the need to tighten the straps with excessively tension and also protects the roof from scratching.

The Duffle Bags add considerable convenience to the tasks of loading and unloading the carrier.

Extra Straps can be purchased for additional fastening options and to add strength to the attachment.

A Padlock brings peace of mind by securing the zipper of the carrier.

The Tire Step allows to easily reach the top of the car, SUV or van for effortless loading and unloading of the carrier.

The Storage Pouch is used to conveniently store the carrier and the accessories when not in use.

The Travel Blanket is a high quality, soft-top, waterproof-bottom pad that can be used as a pet pad, picnic blanket, emergency blanket, etc. It folds into an easy-to-carry package with carrying strap.

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The Duffle Bags ease the task of loading and unloading the carrier. Three Duffle Bags, when filled, nest well and fill the space inside the RoofBag carrier.

The Duffle Bags can be filled at home and then brought to the car using the sturdy handles. This is easier than loading the carrier by bringing all the items individually to the car. Easier also than trying to fill the carrier at home and carrying it to the car -- it gets too heavy to lift when it's full.

Also transporting the contents of the carrier, for example during a hotel stop, is easier with the Duffle Bags.

Additionally, the three Duffle Bags, when filled, conform to the aerodynamic shape of the RoofBag carrier, providing a quiet ride and improved fuel efficiency.

The Duffle Bags are made of soft polyester fabric coated on the inside with polyurethane for water-repellency. It is a lighter fabric than the fabric used on the RoofBag carrier.

The Duffle Bags are meant to be light-weight and take a small volume. They do not have rigid walls and can be folded flat when they are empty.

However, when filled, the Duffle Bags are shaped higher at the rear and lower at the front, to conform to the aerodynamic shape of the RoofBag carrier. When you fill the Duffle Bags, place more items toward the rear, in order to maintain this aerodynamic shape.

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The Protective Mat is made of a special non-slip, soft, rubbery webbing material. It is placed between the car's roof and the bottom of the RoofBag car top carrier.

The Protective Mat adds friction to the contact between the bottom of the RoofBag carrier and the roof of the car to prevent motion of the carrier during travel.

The Protective Mat stabilizes the carrier on the roof, and creates a quieter ride. It also protects the roof of the car by cushioning the contact between the carrier and the roof.

The Protective Mat is not absolutely necessary, but it provides a more stable and quiet ride. Also, without the Protective Mat, wind and vibration can rub the dirt that collects between the roof and the carrier, scratching the roof's finish.

Due to the extra friction provided by the Protective Mat, only slight strap tension is needed to keep the carrier stationary during travel.

We do not recommend placing a blanket or a towel between the carrier and the roof of the car.

A blanket or a towel can actually make the contact between the carrier and the roof slippery, encouraging movement during travel, which is the opposite of the stabilization accomplished by the non-slip Protective Mat.

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The two straps that come with each rooftop carrier are sufficient to hold the carrier securely. However, an extra set of straps can add stability and quietness to an installation.

We recommend extra straps whenever there is room to install them. For example on cars with side rails, 4 straps can be installed side-to-side, parallel to each other.

On cars with side rails and cross bars, 2 straps can go on the side rails, and another 2 on the cross bars.

Cars with no rack can also benefit from 3 or 4 side-to-side straps, especially on a curved roof, or when using a roof top carrier size 17 on a sedan.

Installations through the rear gate on vans, SUVs or coupes, may require lengthening the straps, which can be accomplished by ordering extra straps and splicing them together.

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Yes, you can use any padlock with a shank up to 1/8" thick to secure the zipper.

The padlock we sell is a high-quality, custom-made, solid-brass lock with 3 keys. The key cannot be taken out of the keyhole while the padlock is open, a feature that prevents lost keys.

Additionally, the RoofBag name is engraved on the keys so you never have to wonder what these keys are for.

Solid brass means rust-proof, so our lock can get wet and will never rust or jam.

Also, the keyhole is on the side of the padlock, not on the bottom, a feature you will appreciate if you have to open the lock in the dark or in rain or snow.

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The vast majority of users experience a quiet ride. Follow these tips to prevent noise during travel:

1 - Using a Protective Mat helps cushion and quiet the contact between the car top carrier and the roof.

2 - Keep a distance of at least 8" between the front of the carrier and the front end of the roof. This avoids the air turbulence at the front end of the roof.

3 - Fill the RoofBag carrier to capacity if possible. This preserves the aerodynamic shape of the carrier, which creates a more quiet ride.

4 - If the car top carrier is not full, avoid flapping noise by packing the carrier so that the outer surface is as smooth as possible. Hold down any loose carrier fabric with the straps.

5 - Taut straps sections in open air (as opposed to the sections that are in contact with the carrier) can hum, whistle, or vibrate. Adding a 1/2-turn or a 1-turn twist to the noisy segment of strap will stop the noise.

6 - Tie and tuck the free ends of straps to keep them from flapping.

7 - When fastening the straps, make sure they are as vertical as possible, to create a secure attachment and to avoid movement during travel. Follow the strap angle guidelines shown here: Car Top Carrier Strap Angles.

8 - On a curved roof, use a second pair of straps to secure the car top carrier. This keeps the front of the bag carrier from lifting and flapping.

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