A storm damage roof inspection is an inspection carried out to establish what a specific weather event did to a roof. It records the same defects a routine survey would, and then does the part a routine survey does not: it identifies the mechanism behind each one and separates damage caused by the event from deterioration that was already there.
That separation is the whole job. Every roof has age on it, and an inspection that simply lists everything wrong with an old roof after a storm proves nothing about the storm. What carries weight is a record that shows which defects are fresh, which way the damage runs, where it stops and what the undamaged parts of the same roof look like.
The three questions an inspector is answering
- Is there damage. Not whether the roof is in poor condition, but whether there are defects of a kind a storm produces.
- What caused it. Wind, hail, wind driven rain, flying debris, standing water from blocked drainage, or something that was failing beforehand.
- When. Whether the defect is fresh, weathered or long standing, judged on how the break itself has aged.
Everything in the method follows from those three. What any roof inspection covers is the baseline; the storm version adds attribution to it.
What each mechanism leaves behind
| Mechanism | What it looks like | Where to look first |
|---|---|---|
| Uplift | Lifted edges, open seams, billowed field, pulled fasteners | Corners, then edges, then the field |
| Hail | Impact marks, fractured surfacing, bruising felt underfoot | Soft surfaces, equipment housings, vents |
| Debris | Punctures, scrapes and gouges with a direction | Downwind of trees, screens and neighbouring roofs |
| Wind driven rain | Water entry with no roof defect under it | Walls, upstands, louvres, equipment openings |
| Blocked drainage | Standing water, debris dams, overflow marks | Drains, scuppers, low points |
The last two are worth dwelling on, because they produce leaks without producing roof damage. A roof that let water in because rain was driven horizontally into a wall detail has a wall problem. A roof that ponded because its drains filled with hail and leaves has a maintenance problem that a storm exposed. Both are real findings, and both get misreported as membrane failures.
The sequence of a storm inspection
- Safety first, and genuinely. Wet membranes, lifted metal with sharp edges, hidden soft spots over wet insulation and standing water over an unknown deck. A roof after a storm is not the roof the inspector walked last year.
- The grounds and the elevations. Debris on the ground, dented equipment, damaged cladding, displaced metal, gravel washed off the roof into the gutters. This is where the direction of the event is established.
- The roof field, in a pattern. Corners and edges first, because uplift loads them hardest, then the field in overlapping passes so nothing is covered twice and nothing missed.
- The perimeter and every penetration. Edge metal, parapets, copings, upstands, curbs, pipes, drains. Most of what a storm actually breaks is here.
- Equipment and screens. Rooftop units, their housings, ductwork and anything bolted to the roof, all of which are both damaged and a source of damage when they come loose.
- Inside the building. Ceilings, the underside of the deck where it is visible, and any space a tenant has reported water in.
- Documentation as it goes. Position, photograph, mechanism, note. A finding written up afterwards from memory loses the part that made it useful.
Inspection methods sets out when a drone or a moisture scan adds something to that sequence. After a storm the common additions are a flight to see areas that are not safe to walk, and an infrared scan to map how far water has already spread under the membrane, which a surface walk cannot see.
Why timing changes what can be found
Fresh damage looks fresh. A break in metal is bright, a fracture in bitumen is sharp edged, a puncture has clean margins and the debris that made it may still be lying there. Within a season all of that softens: surfaces oxidise, dirt collects in the break, and the margin between impact damage and ordinary wear narrows.
Interior evidence fades in the same way. A ceiling stain with a clear boundary is datable within reason; the same stain a year later has dried, spread and merged with older marks.
None of this means a later inspection is pointless. It means the finding gets weaker as time passes, moving from attribution to consistency, and that should inform how quickly the visit is arranged rather than whether it happens.
What the report has to contain
A storm report that cannot be followed by somebody who was not on the roof is not finished. Ask for all of the following before you commission it:
- A roof plan with every finding located on it.
- Photographs with scale and orientation, including overview shots that place the close ups.
- The mechanism stated for each finding, not just the defect.
- The undamaged areas described, for comparison.
- The areas that could not be inspected, and why.
- The methods used, and what each one cannot show.
How to read an inspection report covers the wider version of this, and the post storm checklist is the field version you can take up with you.
Where storm inspections go wrong
- Only the roof is looked at, so wall and equipment entry points are missed.
- Everything wrong with an old roof is listed as storm damage, which undermines the genuine findings.
- Photographs have no scale, no position and no overview, so nothing can be located afterwards.
- The inspection is done by the party quoting the repair, with no separate record of findings.
- Temporary repairs go on before anything is photographed, erasing the evidence they were covering.
- Nobody looked at the drains, so a drainage failure gets reported as a membrane failure.
Emergency work and evidence, which pull in opposite directions
An open roof has to be covered, and covering it hides the thing that needs recording. The two requirements are not actually in conflict, but only if the order is right.
Make the building safe first. Nobody should leave water running into a tenant space to preserve a photograph. What a competent emergency crew does alongside that is photograph the breach before the tarp or the patch goes over it, from close up and from far enough back to place it on the roof, and record where each temporary repair was put.
Then keep the invoice and the photographs together. Temporary protection is part of what the event cost, and the record of where it went is the only way an inspector arriving later can tell which defects were already covered. Where a crew has patched without photographing anything, say so in the report rather than leaving the gap unexplained.
What to do before the inspector arrives
Pull the weather record for your address. Photograph anything visible from the ground, and photograph any interior water while it is still wet. Note the date and time water was first noticed and who noticed it. Leave debris where it fell if it is safe to do so, and photograph any temporary covering before and after it goes on. None of that requires a roofer, and all of it is harder to recover later.
Where to go next
If you know hail was part of the event, a hail damage inspection covers what distinguishes an impact from wear in more detail. If you are weighing up who should carry out the work, choosing a roof inspector deals with the question of independence, which matters more after a storm than at any other time.
Common questions
What is the difference between a storm damage inspection and a routine one?
A routine inspection describes condition. A storm damage inspection has to attribute that condition to a cause and a date, which means recording the mechanism of each defect rather than only its existence, and separating what the storm did from what age had already done.
- Routine work asks what needs doing and when
- Storm work asks what happened, to what, and when
- Attribution needs the weather record alongside the roof findings
- Both record defects, but the storm report explains each one
- A storm inspection also covers the grounds and the elevations
The practical difference shows up in the photographs. A condition survey photographs defects. A storm report photographs each defect with something that establishes scale, records its position on a roof plan, and often photographs the undamaged areas too, because the pattern of where damage is and is not is part of the evidence. Directional damage concentrated on one elevation tells a different story from uniform deterioration across the whole roof, and only a report that covers both can show the difference.
Does a storm damage inspection cover the inside of the building?
It should. Water that entered during the storm leaves marks inside that are often clearer than anything visible on the roof, and the position of those marks helps locate the breach. An inspection limited to the roof surface misses half of the available evidence.
- Ceiling stains date and locate water entry
- Wet insulation is sometimes visible from below first
- Deck corrosion and fastener staining show from underneath
- Interior damage belongs in the record either way
- Access to tenant spaces has to be arranged in advance
On a building with a suspended ceiling, lifting a few tiles in the right places is one of the cheapest diagnostic steps available, and it is routinely skipped because it needs somebody to arrange access. Ask when the inspection is booked whether interior access is part of it and who will open the spaces. If the building is let, the tenants need notice, and arranging that after the inspector arrives wastes the visit.
What does a storm damage inspection record that a repair quote does not?
A quote lists work and a price. An inspection records what was found, where it was found, how it was identified and what caused it, in a form somebody who was not there can follow. The two documents answer different questions and one does not substitute for the other.
- Findings located on a roof plan rather than described loosely
- Photographs with scale, orientation and position
- The method used for each finding, and its limits
- Areas that could not be reached, stated plainly
- The condition of undamaged areas, for comparison
The distinction matters most when somebody disagrees later. A quote invites the question of whether the work is needed. A report that records the mechanism of each defect, with photographs that can be located on a plan, answers that question before it is asked. It is also the document that survives a change of personnel, which a verbal account of a roof walk does not. Ask for the report and the quote as separate documents, and read the report first.
Can an inspection tell which storm caused the damage?
Sometimes, within limits. The roof shows the mechanism and the approximate age of a defect, and the weather record shows which events hit that address. Putting the two together narrows it, but a roof cannot carry a date stamp and an honest report says so.
- Fresh breaks look different from weathered ones
- Directional patterns match a wind direction on a record
- Hail impacts in soft surfaces age visibly over seasons
- Several storms in one season are rarely separable
- The weather record is public and worth pulling early
Where damage is recent the two sources usually agree closely enough to be useful. Where it is older, or where a site has taken several events, the honest finding is that damage is consistent with an event of a given type without naming a date, and a report that claims more precision than the evidence supports tends to be read sceptically. That is a reason to inspect promptly rather than a reason to inspect differently.
How long after a storm is the damage still provable?
There is no fixed window, and it depends on the material. Fresh breaks in metal, bitumen and single ply membranes weather within seasons rather than years, and soft surfaces lose the sharp edges that distinguish an impact from ordinary wear sooner than hard ones.
- Exposed breaks oxidise, fill with dirt and soften visually
- Hail bruising in bitumen is clearest while the fracture is fresh
- Interior staining dries, spreads and loses its boundary
- Debris that caused damage gets cleared away
- Later events overlay and confuse the earlier pattern
The practical answer is to inspect as soon as the roof is safe to walk, and to photograph anything visible from ground level before then. Delay does not destroy the evidence outright, but it moves the finding from this was caused by an impact to this is consistent with an impact at some point, and that is a weaker sentence. If time has already passed, inspect anyway and have the report state the date of discovery.