How much does a lead valley repair cost in Cork?

A spot-repair on a single split section runs €380–€650. A full valley replacement (typical 4–6m run, code 5 lead, with new battens and underlay) runs €1,800–€3,200 depending on access. Multi-valley reroof projects average €4,500–€7,500.

How long does a Cork lead valley last?

Code 5 lead has a published lifespan of 80–100 years but expansion fatigue, foot traffic during chimney cleaning, and Cork's freeze-thaw cycles typically mean splits start appearing at 50–70 years. Most Cork terraces built between 1900 and 1940 are now in or past that window.

Lead, GRP, or EPDM — what is best for a Cork valley?

Code 5 lead is still the gold standard for slate-roof valleys — it's malleable, ages well, and looks correct on period housing. GRP is a strong second choice for concrete-tile valleys: lighter, no patina, faster install. EPDM is the cheapest option but limited to lower-pitch valleys and not appropriate on listed buildings.

How quickly do you respond to a valley leak in Cork?

Same day for an active leak. We tarp the valley to stop further water ingress, then return with materials within 48–72 hours to complete a permanent fix. For non-leaking valley deterioration found at inspection, written quote within 24 hours and scheduled work within 2–3 weeks.

What's a 'concealed valley' and why does it matter?

On many Cork dormers and M-section terraces, the valley sits behind a slated cheek where you can't see it from the ground or the attic. These valleys often fail silently for years before a saturated ceiling shows up. Drone inspection picks them up quickly.

Roof valley repair

Roof Valley Repair Cork: Lead, GRP & EPDM Specialists

Cork's 1900–1940 terraces and Edwardian semis are sitting on lead valleys that are 80+ years old — right at the end of their service life. We replace, repair, and retro-fit valley systems on slate, concrete tile and natural-clay roofs across Cork City and County Cork.

What we do

From a single split to a full multi-valley reroof

Valleys are the most failure-prone part of a Cork roof. The geometry collects water and ice, the lead fatigues, the underlay rots, and the failure mode is almost always a slow ceiling stain that shows up months after the actual leak started.

Code 5 lead (the right answer for slate)

We hand-form Code 5 lead valley sections to suit the pitch and width of each individual valley. Lead-welded laps, copper-nailed at the top, free at the bottom to allow thermal expansion. Properly installed, it'll outlast the homeowner.

GRP valley systems

On concrete-tile roofs, especially on Cork bungalows and 1970s–90s estate housing, we specify GRP (glass-reinforced plastic) valley liners. Faster to install, no lead theft risk, clean appearance on the dormer setbacks that GRP suits best.

EPDM valley retro-fit

For lower-pitch valleys (under 22.5°) on extensions and modern construction, a single-piece EPDM membrane gives a seamless drain run. Limited to non-listed buildings — EPDM is the wrong look on a period roof.

Concealed / M-section valleys

Cork has a lot of M-section terraces (Blackpool, Turner's Cross, parts of Sundays Well) where the valley sits behind a slated cheek. These valleys fail silently for years. We use the drone to scope, then strip the cheek, replace the valley, and reinstate.

Cork pricing anchors (2026)

Spot repair (single split, code 5 patch): €380–€650
Full valley replacement, 4–6m, code 5 lead: €1,800–€3,200
GRP valley replacement, 4–6m: €1,200–€2,200
Multi-valley reroof (period terrace, 3+ valleys): €4,500–€7,500
Concealed M-section valley restoration: €2,400–€4,200 (depending on slate cheek)

Itemised quotes with materials, scaffold, waste, and VAT broken out separately. No call-out fee.

What's included

Drone inspection + photo report before quote
Strip-back of failing materials
New underlay (Cromar, Klober or equivalent BBA-certified)
New battens to BS 5534 spacings
Lead, GRP or EPDM system to spec
Replacement slates where original ones broke during access
20-year written workmanship guarantee on the valley itself
Manufacturer warranty on materials (varies by spec)

Why Cork valleys fail

The four failure modes we see most weeks

1. Thermal fatigue split

Lead expands and contracts with every temperature cycle. Over 50+ years on a Cork roof — which sees genuine freeze-thaw cycles roughly 30–50 nights per winter — that's hundreds of thousands of micro-movements. Eventually a fatigue crack appears, usually along the centre line where the lead is stretched thinnest.

2. Pinholes from acid runoff

Lichen and moss on slates above the valley produce mild acid runoff. Over decades it etches the lead surface and creates pinholes that are barely visible but leak steadily in heavy rain. We catch these on the drone close-up imagery.

3. Underlay rot below the valley

Cork's older houses often have bitumen-felt underlay that's now brittle and broken under the valley itself. Water that gets past a degraded valley has no second line of defence — straight onto the rafters and into the ceiling.

4. Foot traffic damage

Chimney sweeps, satellite installers and previous roofers have been walking on the lead. Soft code 5 dents easily. Dented lead doesn't drain — water pools, the lead alloy work-hardens at the dent edge, then cracks. Found this on dozens of Cork chimneys with attached valleys.

Conservation & period housing

Listed buildings, terraces and farmhouses across Cork

Cork has a lot of pre-1960 housing — Georgian Mallow, the Sundays Well terraces, the Edwardian semis around Blackrock, and farmhouses across the county that need slate-and-lead work that sympathises with the original construction. We work to conservation officer briefs where needed and supply a written method statement before any work starts on a listed building.

Book a valley inspection Call 021 202 8387

Valley leak in Cork?

Drone inspection + written quote in 24h

Send a photo of the ceiling stain. We'll be on the roof tomorrow with the drone and have the quote in your inbox the next day.

Get a Quote 021 202 8387