The hours after a roof is opened up by a storm are the most expensive hours in the life of your building. Not because of the hole. Because of what comes through it. Every rain event that hits an unprotected deck turns a roof claim into a roof, insulation, ceiling, electrical, flooring, and inventory claim, and not all of that ends up covered.
Mitigation is a duty, not a favor
Nearly every commercial property policy requires the insured to take reasonable steps to protect the property from further damage after a loss. That is your obligation. If you sit on an open roof for three weeks waiting for the adjuster and the second storm floods the building, the carrier has a legitimate argument that the second round of damage is on you. I have watched owners lose real money not to the storm, but to the waiting.
The flip side: reasonable emergency mitigation costs are generally recoverable as part of your claim. Tarps, labor, dry out equipment, temporary patches. Documented and receipted, that spend usually comes back. Undocumented, it evaporates.
What smart temporary protection looks like
- Fast. On the roof within days, not weeks. After a widespread storm, mitigation crews book out quickly, which is exactly why you move first.
- Secured properly. A tarp flapping loose in the next wind event protects nothing and can cause its own damage. Commercial tarping means ballast, battens, or mechanical attachment appropriate to the roof system, done by people who will not put more holes in the membrane than the storm did.
- Scoped as temporary. This is critical. Emergency work should stabilize, not repair. A crew that permanently patches the damage before inspection has just destroyed the physical evidence your claim rests on. Stabilize, photograph, preserve.
- Interior included. Move or cover inventory and equipment, extract standing water, and get air movement on wet materials before mold makes everything harder.
Document the mitigation itself
Treat the emergency work as its own documented event:
- Photos of the damage before the tarps go down
- Photos of the completed temporary protection
- Invoices and receipts for every dollar of labor, material, and equipment
- A dated note of who did the work and when
That package does two jobs. It supports reimbursement of the mitigation cost, and it proves you met your duty to protect the property, which shuts down a whole category of carrier pushback before it starts.
The contractor angle
Be careful who does your emergency work. After big storms, tarping is a favorite foot in the door for contractors who want you to sign a full replacement contract while water is still dripping. Emergency mitigation and roof replacement are separate decisions. Pay for the tarp, keep the receipt, and keep your options open on the big contract until you have vetted the players. If you want help lining up qualified mitigation without handing your project to a stranger, start a conversation. Getting mitigation done fast and documented right is also one of the first moves in every Overwatch storm engagement.
How long is temporary?
Owners also ask how long a tarp can stay up. The honest answer: as short as possible. Temporary protection degrades, and a tarp entering its third month is a liability, not a mitigation. If the claim is moving slowly, that is not a reason to let temporary protection rot in place. Re inspect it after every significant weather event, photograph its condition monthly, and replace or reinforce it when it shows wear. A documented history of maintained protection keeps the further damage argument firmly on your side of the table, no matter how long the claim drags on.
Tarp fast, keep it temporary, photograph everything, and keep every receipt, because mitigation protects the building and the claim at the same time.