Roof Leak Repairs in Rathfarnham

Tell us about the leak

Which room, when it shows, and whether water is coming in right now.

Emergency roofing: 083 158 8431

Is water coming in right now?

Tell us first whether water is entering now or whether you have found an old, dry mark. An active leak, rapidly worsening damage or a potentially unsafe roof needs a phone conversation rather than a wait for a form response. Call 083 158 8431 so we can check current availability.

Emergency roofing is available 24/7, 365 days a year. Same-day attendance depends on location, weather, traffic, crew availability and safe access; it is not guaranteed. We explain whether conditions allow an assessment, temporary protection or permanent work, without promising an arrival time.

For the wider urgent service and its limitations, see emergency roof repairs in Dublin.

What you can safely do inside while you wait

Everything worth doing before we arrive happens indoors and at floor level. Please don't go onto the roof, a flat extension or a ladder against the gutters to have a look. Wet felt, moss and slates are slippy, and a flat roof that's letting water in may have a soft deck underneath.

• Only where the floor-level area is safe and clear of electrical or ceiling hazards, move belongings and use a container or towels for drips.
• Keep everyone away from a bulging ceiling or water near wiring, sockets or light fittings. Do not touch wet electrical equipment; seek qualified electrical help, and emergency assistance if anyone is in immediate danger.
• From a safe position, note the time and take a photograph of the indoor mark or drip if useful. Do not puncture a ceiling or enter a wet or unsafe roof space to investigate.

A temporary cover is not the repair

If water is getting in and conditions prevent a lasting repair, we may recommend professional temporary weatherproofing where safe access allows. We explain what it is intended to protect, its limitations and what still needs a permanent repair. It is not a request for you to fit a cover, clear an outlet or work at height.

Permanent work needs suitable conditions for the materials and a sufficiently clear diagnosis. We start with the leak history, inspect the accessible roof and adjoining details, then explain the evidence and any unconfirmed areas. A further visit, controlled opening-up or suitable access equipment may be needed; a first visit does not guarantee a repair.

For how an uncertain source is investigated, read our Dublin roof leak diagnosis and repair guide.

What to send us when you get in touch

Send the actual property address or Eircode. Rathfarnham enquiries can concern very different roof sections and access arrangements; these details help us prepare for the assessment.

1. Your address or Eircode, so we know the exact property rather than just the area.
2. The room and the spot where water appears: ceiling, wall, around a window, near the chimney breast.
3. Which part of the roof is above it, if you know: main pitched roof, rear extension, flat roof, dormer or rooflight.
4. When it happens: only in heavy rain, in wind-driven rain from one direction, a while after rain stops, or all the time.
5. Whether it's active now, has stopped, or keeps coming back.
6. Any earlier repairs to that area, and roughly when they were done.
7. Access: side passage, rear garden, conservatory, a shared wall with a neighbour, or parking restrictions.

Where the extension meets the house

Where an extension joins the original house, we inspect the junction as well as the roof surface. Flashing is the weatherproof strip at the wall, while an upstand is the raised edge of the roof covering. Together they need to keep water out as the adjoining parts move and shed rain.

If the flashing has pulled out of its joint, the upstand is too low, or the mortar above it has cracked, water can get behind and show up as a stain along the wall line inside. The same symptom can also come from a gutter or outlet nearby that's backing up in a downpour, which is why we check whether the leak only happens when the drainage is overwhelmed or whether it happens in any rain. An isolated defect at the junction is usually a targeted repair; water that's backing up because of the drainage needs the drainage sorted as well.

Flat roofs over kitchens and extensions

On a flat roof we look at the seams and laps, the edges and trims, the outlets, any rooflight upstands, and whether water runs off or sits in ponds. Persistent ponding can put more stress on vulnerable details; we check falls, outlets, seams and surrounding condition before deciding what needs repair.

A coating or local patch may be suitable where the surrounding roof is sound and the proposed treatment addresses the defect. A wet or unsound build-up needs assessment before choosing repair or refurbishment; another surface patch may leave the underlying problem unresolved. We explain what the inspection establishes, what remains uncertain and whether further investigation is needed before agreeing the work.

For more on assessing and repairing flat roofs locally, see flat roof repairs in Rathfarnham.

Background reading (no affiliation): Sika Ireland on roof refurbishment.

Chimneys, valleys and abutments

A wet chimney breast doesn't automatically mean the flashing has failed. Water can soak through porous brick or cracked render, come in through a damaged cap or flaunching at the top, or get past the back gutter on the uphill side where leaves and silt collect. Each of those needs a different fix, so we check the masonry and the leadwork separately.

Valleys and abutments are similar. Where two roof slopes meet, or a roof meets a wall, the lead or valley lining and the slates or tiles beside it work together. A split in the lead is one thing; slates cut too short at the edge of a valley, or debris damming the channel, is another. We look at the whole detail, not just the lead.

If the chimney stack itself needs attention, see chimney repairs in Rathfarnham.

For flashing, valleys and roof junctions more generally, see lead flashing and valley repairs.

Slates, tiles, ridges and verges

On the main roof, we check slipped slates or cracked tiles alongside their fixings, the overlap between courses, the ridge and its bedding, and the verges at the gable ends. Damaged or failed fixings are one possible cause of a slipped slate; the slate itself and adjoining details also need inspection. Repeated movement warrants checking the wider slope rather than assuming each displaced unit is an isolated fault.

Where safe attic access is available, we look at the underlay from inside for tears, sagging or staining that may help trace water movement. That isn't always possible, and we explain if part of the roof couldn't be seen.

For slate roofs specifically, see slate roofing in Rathfarnham.

For concrete or clay tiles, see tile roofing in Rathfarnham.

Gutters and outlets: overflow or a failed roof?

A blocked gutter or outlet can push water back under the edge of a roof or over the top onto a wall, and from inside that can look exactly like a roof leak. If your property has mature trees nearby, leaves and seeds in the gutters are worth ruling out first; where there aren't trees, we look harder at joints, falls and downpipes.

Timing helps us choose what to inspect, but it does not prove the cause. A leak during a downpour could involve overflow, a roof junction or a covering defect. We check the outlet, gutter falls, joints and discharge route alongside the adjacent roof before recommending either gutter work or a roof repair.

If the gutters are the problem, see gutter repairs in Rathfarnham.

Rooflights: condensation or a leak?

Moisture around a rooflight or roof window may be condensation or water entering at the surrounding weathering. Warm, moist indoor air meeting cold glazing is one possible explanation. The pattern, location and relationship to weather help us decide what to assess rather than establish the cause on their own.

We inspect the unit and adjoining flashing, upstand, seals and roof covering where accessible. Those checks inform whether any repair or replacement is appropriate; water near a rooflight alone does not establish which part needs work.

Background reading (no affiliation): VELUX Ireland on windows that appear to be leaking.

Access, shared junctions and protected properties

Some roofs have shared chimney stacks, parapets, party-wall junctions or gutters. Tell us if a neighbouring roof is involved so we can establish the repair boundary and any agreement needed before work. A narrow side passage, conservatory below the roof or access through another garden can change the safe access method and quotation.

South Dublin County Council's adopted development plan identifies conservation considerations in Rathfarnham Village, including St Mary's Terrace and Willbrook Road. This does not establish the status of every Rathfarnham address. If protection may apply, check the individual property and proposed work with the council before agreeing changes to materials or details; matching the appearance alone does not settle any consent requirement.

Source: SDCC adopted plan, Appendix 12 (PDF).

What the quote should spell out

Quotations are free, and we prefer to give you a clear written one rather than a figure over the phone. It should leave you in no doubt about what you're paying for.

• The defect found, where it is, and what the repair involves.
• Materials to be used, and whether they match what's on the roof.
• Access: ladders, a tower or scaffolding, and who arranges it.
• Protection for the house, garden and any conservatory or extension below.
• Any adjoining work needed to make the repair sound, such as a section of flashing beside a slipped slate.
• Removal of waste and old materials.
• What's excluded, and what couldn't be inspected.
• How concealed damage found once work starts will be handled: we stop, show you and get your approval before any extra work.
• The workmanship terms for the agreed work.

Repair, or is it time for wider renewal?

Where a leak comes from a defined defect and the surrounding roof remains sound, a local repair may be suitable. Repeated fixing failures, wider deterioration or a wet or unsound flat-roof build-up need assessment before choosing repair or refurbishment. Another surface patch may leave the underlying problem unresolved, but dampness alone does not establish the treatment required. We explain the findings, inspection limits and options, including wider renewal where the condition justifies it.

For replacement of a failing roof on an existing home, see new roofs and re-roofing in Rathfarnham.

After the repair

Plaster and timber may take time to dry, and an old stain can remain after a repair. A mark alone cannot confirm whether the roof is watertight. Note fresh droplets, spreading wetness or changes after rain, and allow the affected fabric to be assessed before redecoration. We discuss drying and any follow-up needed for the work agreed.

Fresh wetness after rain warrants reassessment, but does not by itself identify the source. Contact us with a description of the fresh wetness, the affected room and the dates and weather; that is enough to arrange follow-up. Photos are optional and should only be taken from a safe indoor position. When you're ready to start, use the form on this page or call 01 727 0010.

For more on Rathfarnham roofing, see roofers in Rathfarnham.

For wider coverage, see roofing across Dublin.

Roof leak repair FAQs