How to Store a Roof Box | Keep It Safe For Years

How you store your roof box between road trips decides how many seasons it will last. A few minutes of smart prep keeps the seals supple, the shell crack-free, and the mounting hardware ready to bolt back on. The good news: the process takes under an hour and needs nothing special.

Why Storage Position Matters

Roof boxes are hollow, lightweight shells built to shed wind, not to bear weight in odd positions. Set one upright and its own weight concentrates on the lower corners, which can warp the shell or stress the lid seal over months. Roofbox.co.uk states boxes should always be stored on their base, never vertically, to reduce damage and prevent falls.

The lid seal is the other priority. A box stored slightly warped, or left baking in the sun, develops gaps that let rain and dust in during your next trip. Thule’s U.S. guidance says a dry spot out of direct sunlight preserves the box’s material longevity.

Step-By-Step: How To Store A Roof Box

Follow this order — it takes about 30 minutes and covers everything that matters:

1. Remove the box from the vehicle. Have a second person help; the box is awkward even when light.
2. Empty it completely. Check every compartment, then remove the key and store it somewhere safe indoors.
3. Clean inside and out. Wash off road salt, dirt, and bugs. Salt is the worst offender — it eats hardware and trim. Dry the box fully with a cloth.
4. Place it on its base on the floor in your chosen dry, cool, shaded spot. If the floor is concrete, Halfords recommends raising the box on planks of wood, or at least laying a sheet underneath it.
5. Keep mounting hardware off the ground. REI advises lifting the box so fittings don’t rest on the floor, where they can corrode or dig in.
6. Cover it loosely with an old sheet or dust cover. Halfords says this prevents scratches and dents.

If you’re considering a new box or a roof rack system to pair with it, our tested vehicle roof storage box roundup compares the top models side by side.

Where To Store It (And What To Avoid)

Your best options are a garage, shed, or loft — anywhere dry, cool, and shaded. A wall or ceiling hoist works well if floor space is tight; MyRoofBars suggests leaving the lid slightly open for airflow and never stacking items on top of the box.

The mistakes that shorten a roof box’s life:

• Vertical storage. Roofbox.co.uk explicitly advises against it.
• Leaving it outside. UV rays and weather degrade the shell and seals.
• Direct sunlight. Thule warns this harms material longevity.
• Bare concrete floors. Halfords says raise it on planks or use a sheet.
• Leaning it against a wall. It can fall and crack.
• Storing it wet or dirty. Moisture and salt invite mold and corrosion.

FAQs

Can I store a roof box in an unheated garage during winter?

Yes, an unheated garage is fine. The key is keeping the box dry, out of direct sunlight, and away from extreme temperature swings. Freezing temperatures alone won’t harm a hard-shell box, but moisture trapped inside can freeze and damage the plastic or promote mold.

Is it bad to store a roof box upright?

Yes. Roofbox.co.uk recommends against vertical storage because the weight concentrates on the corners and can warp the shell or stress the lid seal. Store the box flat on its base instead, and never lean it against a wall where it can fall.

Do I need to clean my roof box before storing it?

Yes, always. Wash off road salt, dirt, and debris from both the inside and outside, then dry it completely before putting it away. Salt causes corrosion, and trapped moisture leads to mold and odors that are hard to remove later.