Drone Roof Inspections Explained (Cork)

Most Cork homeowners are flying blind on the condition of their roof. The only signs you usually get — a leak, a slate in the garden, moss spreading — show up long after the underlying problem started. A drone inspection lets a roofer see every square metre without ladders or scaffolding, and catch the small stuff while it’s still cheap to fix.

I’m Michael Casey, founder of Keystone Roofing. Drone surveys are one of the most useful tools we’ve added since I started on Cork roofs back in 2000 — if you already know you want one, you can book a drone roof inspection in Cork here. Otherwise, here’s exactly how they work, what they detect and when they’re worth booking.

How does a drone roof survey work, step by step?

There’s more to it than pointing a camera up. A proper survey runs through four stages, and stays safely on the ground the whole time:

1. Pre-flight check — we confirm the drone is airspace-legal for your location (parts of Cork near the airport at Ballygarvan have restrictions), check wind and weather, and plan a grid that covers every slope, ridge, valley and chimney.
2. 4K and thermal capture — the pilot flies the planned grid capturing high-resolution stills of the whole roof. A thermal pass picks up cold spots where water has tracked under the covering — invisible to the naked eye.
3. Attic cross-check — for a full survey we pair the aerial view with a look in the loft, matching any staining or daylight showing through against the exact spot on the roof above. That’s how you tell a surface blemish from an active leak.
4. Written photo report — we review the imagery afterwards, mark up anything that needs attention, and send you a report with annotated photos and a plain-English recommendation. You keep it.

See our full drone roof inspection in Cork service for exactly what’s included.

What can a drone actually detect?

Far more than you’d spot from the ground or a ladder. On Cork’s older housing stock — the pre-1940s city terraces and the 1970s–90s semis along the N20 and N22 — the common finds are:

• Slipped and cracked slates — the most common issue after an Atlantic storm blows in off the harbour.
• Failed lead flashing — perished or lifted lead around chimneys and abutments, the leading cause of leaks we trace.
• Cracked chimney crown or perished mortar — hairline cracks that let water into the stack and timbers below.
• Valley defects — splits, blockages and corrosion where two slopes meet, often invisible from the garden.
• Moss coverage and blocked gutters — how far moss has spread, and whether gutters and hoppers are choked and backing up under the eaves.
• Membrane splits — on flat and dormer sections, tears or blistering in the felt or single-ply that lead straight to a leak.

Catching a slipped slate at survey stage is a quick fix; finding it after it’s let water track into the timbers is a far bigger roof repair. That’s the whole value — problems found early stay small.

When is a drone inspection worth booking?

There are four moments it clearly earns its keep:

• Pre-purchase survey — an objective, documented look at a roof you’re about to pay for, before you sign. It can save a five-figure surprise on a period property.
• Post-storm insurance evidence — timestamped overhead imagery your insurer will accept, captured safely without anyone climbing a damaged roof. More on that in our storm damage insurance guide.
• Before a repair or replacement quote — so any quote you get is based on the actual condition of the whole roof, not a guess from the ground.
• Routine maintenance — a check every few years catches problems while they’re cheap, especially on exposed coastal properties towards Carrigaline.

Why does a drone beat climbing up?

For most situations a drone gives more complete coverage in less time, with none of the downsides of physical access:

• No scaffolding cost just to look — scaffolding to inspect a two-storey roof runs €800–€2,500 ex-VAT. A drone survey is a fraction of that.
• Safer — nobody sets foot on a wet, mossy or storm-damaged roof to find out it’s a problem.
• Sees the whole roof — every valley, behind every chimney stack, every dormer junction that’s awkward or impossible from a ladder.
• Documentation you keep — a dated photo report you can hand to an insurer, a solicitor or the next roofer, rather than one person’s word.

The exception is when something specifically needs to be physically tested, like a loose ridge tile; then we follow the drone survey with targeted access. Climbing should be the last step, not the first.

Use cases and what each one delivers

Use case	What the drone survey delivers
Pre-purchase survey	Independent condition report with annotated 4K photos before you buy — room to negotiate on price, and peace of mind.
Post-storm / insurance	Timestamped overhead evidence of slipped slates and damage your insurer will accept for a claim.
Before a repair/replacement quote	Accurate scope so the quote reflects the real state of the whole roof, not guesswork.
Routine maintenance	Early warning on moss, mortar, flashing and gutters — small fixes before they become big ones.
Leak diagnosis	Thermal plus attic cross-check pinpoints where water is actually getting in.

What does a drone roof inspection cost in Cork?

We keep it simple and fixed — no hidden extras:

• €100 ex-VAT for a standard 3-bed semi-detached house.
• €150 ex-VAT for a detached or dormer property (more roof, more angles, more flying time).
• Free when the survey forms part of a Keystone repair or replacement quote — we roll it into the job.

Every survey comes with the written photo report. If it turns up work, our roof repairs cost guide shows the typical ex-VAT ranges you’d be looking at next.