RV hail damage in Calgary and Alberta: prevention, inspection and repair

Why hail matters for Alberta RV owners

The area between the foothills and the prairies, including Calgary and much of southern and central Alberta, sees frequent summer thunderstorms, and many produce hail. Hail season generally peaks in the summer months, roughly June through August. Severe storms in the Calgary area have caused major insured losses in past years.

RVs are especially vulnerable because so much of their exterior is lightweight:

• Plastic roof vent lids, skylights and A/C shrouds crack or shatter, often letting rain straight in.
• EPDM and TPO roof membranes can be bruised or punctured, especially over hard spots.
• Fibreglass sidewalls and end caps dent and can crack the gelcoat.
• Aluminum siding dents easily.
• Awnings, solar panels and windows can be damaged.

Prevention: what actually helps

Know when storms are coming

• Watch Environment and Climate Change Canada forecasts and severe thunderstorm watches and warnings. Weather alert apps can notify you when warnings are issued for your area.
• Storms often build in the afternoon and evening on hot summer days.

Covered or indoor storage

The most effective protection is a roof over your RV: an indoor storage facility, a covered storage spot or your own building. Covered spaces in the Calgary area can be in demand, so ask early in the season. See RV storage tips for Calgary winters.

Practical steps if you're stuck outside

• Move the RV under any solid cover available when a warning is issued, if it's safe to do so.
• Retract the awning and slide-outs (slide toppers are easily torn).
• Close vent lids. Some owners fit vent covers, which add a layer over the lid.
• Purpose-made hail protection: Some products (padded covers, hail blankets) are marketed for RVs. Results depend heavily on hail size and how securely the cover is fastened. Standard breathable RV covers aren't designed to stop hail.
• Never go onto the roof during a storm, and never stay outdoors during lightning or hail.

Insurance check

Before hail season, review your RV policy:

• Is hail covered? What's the deductible?
• Is the policy based on actual cash value or replacement cost?
• Is storage location relevant to coverage?

Talk to your insurer or broker. Take dated photos of the roof and exterior each spring so you have "before" pictures.

After a hailstorm: inspection checklist

Inspect as soon as it's safe, ideally before the next rain.

Safety: Wait until the storm has fully passed. Watch for broken plastic and sharp edges. Don't walk on a roof that may be damaged or slippery, and check that your roof is rated as walkable. Inspecting from a ladder at several points is often safer.

Roof:

• Vent lids and frames: cracks, holes, missing pieces
• Skylights: cracks, crazing, holes
• A/C shroud: cracks or holes
• Membrane: bruises, cuts or punctures (run a hand over suspicious areas)
• Sealant: new cracks around fixtures
• Solar panels: cracked glass or damaged frames
• Antennas, plumbing vent caps and fridge roof vent

Exterior:

• Fibreglass dents or gelcoat cracking (look across the surface at a low angle in daylight)
• Aluminum siding dents
• Window glass and frames
• Awning fabric and arms
• Clearance light lenses

Inside:

• Water stains on ceilings and walls
• Soft spots
• Moisture readings around vents (a moisture meter helps)

Photograph everything from several angles, with something for scale.

Temporary repairs

Your priority is keeping water out until permanent repairs can be done:

• Patch cracked vents, skylights or membrane punctures with RV roof repair tape compatible with your roof material, applied to a clean, dry surface.
• If a vent lid is shattered, a temporary cover is better than nothing.
• Avoid tarps that flap and chafe the roof, or secure them well.

Insurance tip: Make only the minimum temporary repairs needed to prevent further damage, and keep receipts. Most policies expect you to protect the property from further loss. Check with your insurer before permanent repairs.

Permanent repairs

Depending on the damage, repairs might include:

• Replacing vent lids or complete vent assemblies, skylights and the A/C shroud.
• Patching or replacing the roof membrane.
• Repairing or replacing fibreglass panels and end caps.
• Paintless dent repair on some aluminum or metal surfaces.

Vent and skylight swaps are DIY-friendly jobs for many owners (see RV roof leak: how to find the source and fix it properly). Membrane replacement and fibreglass work are usually professional jobs. After a widespread storm, RV body shops and repair facilities can get very busy, so get on the list early.

Hidden damage

Hail damage isn't always obvious. Small bruises in a roof membrane or hairline cracks in a vent may not leak until months later. Re-inspect after a few weeks and again in fall before storage.