How Much Does a Roof Repair Cost in Dublin?

What affects the cost of a roof repair?

Two things decide most roofing repair costs: how much work the repair itself involves, and how difficult it is to get to safely. A repair that takes an hour once you are standing on the roof can still be a half-day job if the only safe way up is a scaffold.

The main factors we weigh up when pricing a repair on a Dublin home are below. Very few jobs involve only one of them.

Cost factors

• The defect itself — a handful of slipped slates is a different job to a failed chimney abutment
• Whether the damage is localised or part of wider deterioration across the roof
• The roof covering: natural slate, fibre cement slate, concrete or clay tile, felt, GRP or another flat system
• Detailing involved — valleys, lead flashing, ridges, hips, verges and abutments are slower work than plain slating
• Height and pitch: a steep two or three-storey roof needs different access to a single-storey extension
• Access equipment — ladders and a tower on some jobs, scaffolding or a platform on others
• Position of the defect: a chimney stack in the middle of a slope is harder to reach than a gutter-line slate
• Extent of water ingress and whether saturated timber, felt or insulation has to be dealt with
• Whether matching materials are readily available, particularly on older slate roofs
• Urgency — an emergency call-out to make a roof safe is a different piece of work to planned repair work

Why two roof leaks can cost very different amounts to repair

Imagine two houses with an identical damp patch on an upstairs ceiling. On the first, a single slate has slipped directly above it; the repair is refixing the slate and checking its neighbours. On the second, the water is running down a rafter from a split in the lead soaker at a chimney four metres away, and the mortar fillet has failed along with it. The internal symptom is the same. The work is not.

That is why roofing quotations vary between contractors as well as between houses. A price based on the stain, rather than on the defect causing it, tends to be the price that turns into a second visit.

Repairing the cause rather than just the visible symptom

Water rarely enters a roof directly above where it appears inside. It tracks along battens, felt and timbers until it finds a low point. Any sensible roof repair therefore starts by working backwards from the internal evidence to the actual point of entry, using the attic where there is access.

Patching the nearest suspicious-looking area is cheaper on the day and more expensive over a winter. Where we can see that a roof has already been patched more than once in the same area, we will say so, and set out what a durable repair would involve instead. You can read more about how we trace water ingress on our leaking roof repairs page.

Common Dublin roof repairs and what makes them simple or complex

Typical repairs

• Slipped or broken slates and tiles — usually straightforward where the surrounding covering is sound; more involved where nail fatigue is widespread. See slate and tile repairs.
• Leaking valleys — cost depends on the valley construction, its length and the condition of the slates on either side. See roof valley repairs.
• Chimney-related leaks — repointing, flashing renewal or both, and access to the stack drives the price. See chimney repairs.
• Failed flashing at abutments, parapets and roof windows — see lead flashing.
• Flat roof defects — splits, blistering, failed upstands and poor drainage. See flat roofing.
• Storm damage — often several small defects at once, which is usually quicker than several separate visits. See storm damage repairs.

Does access and scaffolding change the price?

Yes, and on smaller repairs it can be the largest part of the cost. Safe access is not optional: working at height on a pitched roof requires the right equipment for that property, and the right equipment depends on the height, the pitch, the ground conditions around the house and where on the roof the work is.

A rear extension roof reached over a level garden is a very different proposition to a chimney on a terraced house with rear access only through the property. We confirm what access the job is expected to need before quoting, so the anticipated access cost can be included in the written quotation.

Can a roof repair be quoted without inspecting the roof?

A rough indication can sometimes be given over the phone for a very simple, clearly described defect. A firm price cannot, and any roofer who offers one has either seen the roof or is guessing.

The reason is that hidden defects are common. Lifting a few slates around a leak can reveal perished felt, rotten battens or a previous repair done in mortar rather than lead. We aim to identify as much as reasonably possible during the inspection. Some concealed defects may only become visible once roofing materials are lifted or an area is opened up. If that happens, we explain what has been found and discuss any additional work with you before proceeding. Our roof inspections page explains what a roofing inspection involves.

Repair or replacement?

Repair is usually the sensible option where the damage is localised and the rest of the covering is serviceable. Where slates are slipping in a new place every winter, the underlay has perished, or repairs are becoming an annual event, the money spent patching starts to work against you.

We will tell you which situation we think you are in, and we will not push a replacement on a roof that can reasonably be repaired. If you are weighing this up, our guide to roof repair vs replacement sets out both sides, and the new roof cost guide covers what drives replacement pricing.

What about an emergency repair?

An emergency call-out and a planned repair are different pieces of work. The first priority during a call-out is stopping further water entering the building and making the roof safe; the permanent repair is usually specified and priced afterwards, in daylight, once the defect can be seen properly.

Emergency roof repair call-outs are available 24 hours a day, 365 days a year on 087 466 6010. Normal quotation and repair work is carried out during business hours. See emergency roof repairs.