Shed storm damage and insurance claims.
Every time a serious front comes through Melbourne’s south east our phone runs hot with the same call: the roof lifted, the insurer is asking questions, and nobody can find the paperwork. Here is what actually determines whether a shed claim gets paid in the City of Casey.
Why the permit matters more than the storm.
Casey sits in AS 1170.2 Region A, non-cyclonic. That does not mean benign. The winter southwesterlies that come off Port Phillip and up the Hallam Valley, and the hot northerlies that precede a summer change, both routinely deliver gusts that will find any weakness in a shed. On the ridgelines south of the freeway toward Beaconsfield, around Harkaway and out at Narre Warren North, exposure lifts a shed from an N2 design to N3 or N4. A shed engineered for a sheltered estate block and erected on a ridge is a claim waiting to be lodged.
Here is the part that surprises people. When that shed fails, the argument with the insurer is rarely about how hard the wind blew. It is about whether the structure should have withstood it. An engineering certificate that names the design wind speed for your actual block puts the burden back on the weather. No certificate, and the insurer is free to argue the shed was never fit for the site.
The four documents that get claims paid.
Put these in a folder now, not after the next storm:
- The City of Casey building permit. Proof the structure is legal.
- The AS 1170 wind-load engineering certificate. Names the design wind speed and the wind classification the shed was built to.
- The certificate of final inspection. Proof it was built to the permit and signed off by a registered building surveyor.
- The BlueScope warranty registration. Proof of the product and its coating class.
Add dated photos of the shed in sound condition and any maintenance receipts. Assessors are not adversaries by nature, but they are looking for a reason to categorise damage as gradual rather than sudden, because gradual is excluded. Documentation removes the ambiguity. Our Casey permit guide explains what triggers a permit and what does not.
Sudden versus gradual: the line the whole claim turns on.
Storm damage is covered. Wear, rust, corrosion and lack of maintenance are not. The trouble is that they produce similar looking failures. A roof sheet that peels back in a gust because the stitching screws were sound is a storm claim. The same sheet peeling back because the neoprene washers had perished over a decade and the screws had backed out is, from the insurer’s point of view, a maintenance failure that the storm merely revealed. An assessor who finds rusted screw heads around the failure zone will say so in the report.
This is the practical reason we bang on about maintenance. It is not just about the shed lasting. It is about keeping your cover intact. The annual checklist is on our Colorbond shed maintenance page, and the symptoms that show up before a failure are on shed problems and warning signs.
Worked example: storm-damaged 12m x 18m shed, Narre Warren North (2026 pricing).
Southwesterly front lifted six roof sheets and two purlins on an exposed rural-residential block. The owner had the permit and the certificate. Claim paid. The repair scope:
- Emergency make-safe, strip loose sheeting, temporary weatherproofing = $1,850
- Two replacement C-section purlins, supplied and installed = $2,400
- Six Colorbond roof sheets cut to length, plus ridge and apex flashings = $3,100
- Full re-stitch of the affected bays with new Class 3 fasteners = $1,400
- Engineer inspection and re-certification letter for the insurer = $950
- Crane hire and labour = $4,200
Total: $13,900, settled less the excess. The neighbour, two blocks along, had a similar shed of a similar age with no permit. Same storm, similar damage, claim declined. He paid the repair himself and then paid again for retrospective approval. That is the whole argument for doing it properly, in one paragraph. Larger structures are covered on our industrial sheds page, and the local exposure story for that pocket is on the Endeavour Hills page.
Domestic building insurance is a different thing entirely.
Do not confuse your home and contents policy with domestic building insurance, which protects you against the builder dying, disappearing or becoming insolvent mid-job. In Victoria it is required for domestic building work over $16,000 and the builder must give you the certificate before taking money beyond the deposit. Below that threshold it is not required, but VBA registration still is for any domestic building work over $10,000. Most single garages fall in that gap: registered builder required, domestic building insurance not. Most workshops need both.
Shed insurance questions.
Will my insurer pay out on a shed built without a permit?
Often not, and this is the single most expensive mistake we see in Casey. Most home and contents policies exclude loss arising from an unapproved or non-compliant structure, and a storm claim on an unpermitted shed is exactly the claim an assessor looks hardest at. Even where the policy would respond, the insurer can argue the damage flowed from the structure not being engineered to AS 1170.2 for the site wind classification rather than from the storm itself. Read your own product disclosure statement, because the wording varies, but assume a shed with no permit is a shed with no cover.
What shed storm damage is actually covered?
Sudden damage from a defined event: wind, hail, a tree limb through the roof, storm-driven water entry. What is almost never covered is gradual deterioration, rust, wear and tear, or damage the insurer can attribute to a lack of maintenance. That distinction matters more than people realise, because the two often look identical after a storm. A roof sheet that lifted because the stitching screws had perished over ten years is a maintenance claim dressed as a storm claim, and an assessor who sees rusted screw heads around the failure will call it. Maintenance is what protects your cover.
What documents does the assessor want?
Four things, and you want them in a folder before you ever need them: the City of Casey building permit, the AS 1170 wind-load engineering certificate showing the design wind speed the shed was built to, the certificate of final inspection, and the BlueScope warranty registration. Add dated photos of the shed in good condition and any maintenance receipts. That bundle turns a contested claim into a paid one, because it proves the structure was compliant and maintained and shifts the argument onto the weather. We hand every client that bundle at handover.
Is domestic building insurance required on a shed build?
In Victoria, domestic building insurance is required for domestic building work valued over $16,000, and the builder must arrange it and give you the certificate before taking any money beyond the deposit. Separately, any domestic building work over $10,000 must be carried out by a VBA-registered builder. So a $12,000 garage needs a registered builder but not domestic building insurance, and a $25,000 workshop needs both. If a builder quoting you $30,000 cannot produce a domestic building insurance certificate, stop there and check their registration on the VBA public register.
My shed roof lifted in a storm - what do I do first?
Safety first, then evidence, then the insurer, and do not clean up before the last two. Keep everyone away from loose sheeting, because a flapping roof sheet in a 60km/h gust is genuinely dangerous, and stay clear of anything touching a power line. Photograph everything from several angles before you move a single sheet, including the failure points and the screw heads. Ring your insurer to lodge and get a make-safe authority. Keep the damaged material on site until the assessor has seen it. Then get a make-safe done properly rather than tarping it yourself off a ladder in the wind.
Storm work across Casey.
Storm damage? Get it assessed properly.
We write engineer-backed repair scopes insurers accept, and we build replacements with the certificate in the folder from day one.