Roof work kills more Irish trades workers than any other above-ground task. Slates, fragile materials, weather, and the simple geometry of a pitched roof combine to turn a routine job into a fatality. This is what the HSA expects every roofer, plumber, electrician, antenna installer and solar PV team in Ireland to know.
The three roof families
- Pitched roof: tile, slate, metal sheet - the classic Irish roof.
- Flat roof: built-up felt, single ply, asphalt, green - on schools, factories, retail.
- Fragile roof: asbestos cement, fibre cement, GRP roof lights, old corrugated iron, polycarbonate. Always treat as fragile until proven otherwise.
The HSA Code of Practice in 6 rules
- Plan the access. Scaffold, MEWP, roof ladder or harness anchor - decide before anyone climbs.
- Edge protection beats personal protection. Always.
- Treat fragile roofs as fragile. Crawl boards, walk lines, edge nets, and a permit-to-work system.
- Working at Heights Training certified for everyone on the roof. The Working at Heights Course covers all three roof families.
- Weather decides. Wind over 12 m/s, rain on a slate roof, frost on flat roofing - stop work.
- Have the rescue plan written and rehearsed before the first foot lands on the tiles.
Pitched roof - what HSA inspectors look for
- Independent scaffold to eaves height with toe boards and brick guards
- Roof ladders hooked over the ridge, not balanced on tiles
- Catch barriers or netting under the working area
- Permanent or temporary roof anchor for harness use during cutting and detail work
- Material handling - no carrying tiles up a roof ladder, use a hoist
Flat roof - the false comfort problem
Flat roofs feel safe because they are flat. They are not. The Irish HSA reports that most flat-roof falls happen within 2 metres of the edge while a worker is concentrating on the task and forgets the geometry. Mitigations:
- Permanent or temporary edge protection on every accessible edge
- Demarcation line 2 metres from edge for restricted-access zone
- Permanent anchor lines (Type C horizontal lifelines) for maintenance access
- Self-closing access hatches with handrails on all four sides
- Edge protection BEFORE solar panels, plant or membrane work begins
Fragile roof - the absolute rules
Falls through fragile materials are responsible for a disproportionate share of Irish roofer fatalities. The rules are non-negotiable:
- No-one walks on a fragile roof. Crawl boards or staging spread the load to the purlins.
- Permanent anchor + harness with restraint to prevent reaching un-boarded areas
- Permit to work issued for every shift, signed by the contractor and the building owner
- Asbestos cement roofs - treat as both fragile and hazardous; HSA notification may be required
- Old skylights are statistically the most dangerous fragile component on Irish flat roofs
Roof anchor placement - the two-thirds rule
For pitched roofs, a single roof anchor at the ridge gives effective coverage to roughly two thirds of the roof slope. For larger roofs use multiple anchors with a horizontal life line between. Always rope length plus deployment plus margin must be less than the height to the eaves edge - otherwise the worker hits the ground before the system catches them. See our safe work at height techniques guide for the full clearance maths.
Solar PV roofers - a special case
Solar installations have produced a wave of incidents in Ireland over the last 5 years. The combination of new roofers, panel weight, slippery glass surfaces and the temptation to "just nip up to align that one panel" has made it the highest-growth fall category. Best practice:
- Independent scaffold to eaves on every house roof
- Roof anchor pre-fitted before panels are placed
- Harness + restraint, never just arrest, on a 35-degree pitched tile roof
- Pre-installation site survey signed by the lead installer
Weather rules for Ireland
- Wind over 12 m/s (force 6) - stop pitched roof work
- Rain on slate, metal sheet or membrane - stop. Wet surfaces are a different game.
- Frost or snow - stop until the surface is treated or thawed
- Sun glare on a south-facing slope can cause depth-perception loss; brief the team
Working at Heights Course coverage
The Working at Heights Course online includes a roof-work module: pitched / flat / fragile, anchor selection, edge protection, weather decisions, fragile permit-to-work, and rescue plan. Each worker downloads the Working at Heights Certificate at the end. 45 minutes, 35 euro, instant.
FAQs
Is a roof ladder enough on its own?
Only for very short tasks on a fully scaffolded roof with edge protection. For anything else, ladder + harness + anchor is the minimum.
Do I need a fragile-roof permit even for a quick aerial install?
Yes if the roof contains any fragile material. The 5-minute rule does not apply to fragile roofs in Ireland.
Get the whole crew certified. Start the Working at Heights Course online, finish in 45 minutes, instant Working at Heights Certificate. Bulk pricing for crews on the team training page.
