Flat Roof Repair and Installation.
Our flat roofing services deliver durable, low-maintenance solutions suitable for modern homes, extensions, and residential buildings across Ireland.
Flat Roof Repair & Replacement in Cork, Kerry, Clare, Tipperary & Limerick
Flat roofs are a common sight on extensions, garages, dormers, porches, and commercial buildings across Ireland — but they take a real hammering from our weather. With rain sitting on the surface rather than running straight off, a flat roof has to be watertight and well-installed to do its job. When it isn’t, leaks follow quickly.
At Capital Roofing And Maintenance, we’ve been repairing and installing flat roofs across Munster for 25 years, using every major flat roofing system. Here’s what you need to know about keeping yours watertight.
Flat Roof Repair
Flat roofs can develop problems over time, especially older felt roofs that have been up for years. The good news is that many issues can be repaired before they need a full replacement — as long as they’re caught early.
Common flat roof problems:
- Ponding water that sits on the surface instead of draining away
- Cracks, splits, or blisters in the roofing membrane
- Leaks and damp patches appearing on the ceiling below
- Lifting or peeling at the edges and joints
- Failed seams where sections of membrane meet
- Damaged flashing where the flat roof meets a wall or upstand
- Moss, algae, and debris trapping moisture on the surface
How to spot it:
- Water stains or damp patches on the ceiling beneath the flat roof
- Pools of water still sitting on the roof long after rain
- Visible cracks, bubbles, or splits in the surface
- Edges or seams lifting away from the roof
- A soft or spongy feeling underfoot in places
Why it matters: A flat roof has less natural run-off than a pitched roof, so once the waterproof layer is breached, water gets in fast and sits there. Left unrepaired, that leads to soaked insulation, rotting timber decking, and damage to the room below. Catching a crack or failed seam early often means a straightforward repair rather than a full replacement.
New Flat Roof Installation
When a flat roof is beyond repair — or you’re building an extension, garage, or dormer — a professionally installed new flat roof gives you years of watertight protection. The right system, correctly fitted, makes all the difference.
A new flat roof gives you:
- A fully watertight, seamless finish built to handle standing water and heavy Irish rain
- A long lifespan when installed properly with quality materials
- Better drainage designed to move water off the roof efficiently
- Improved insulation to keep the room below warmer and reduce heat loss
- A clean, modern finish that lifts the look of extensions and garages
- Peace of mind with the whole job done right from the deck up
We install every major flat roofing system and will advise on the best one for your building, budget, and how the roof is used.
Types of Flat Roof We Install
Not all flat roofs are the same. We work with all the leading systems, so you get the right material for the job — not just whatever a roofer happens to fit.
GRP Fibreglass Roofing
A tough, seamless fibreglass system laid as a single continuous layer with no joints to fail. GRP is extremely durable, long-lasting, and gives a clean, hard-wearing finish — an excellent choice for roofs you want to last.
EPDM Rubber Roofing
A single-piece rubber membrane that’s flexible, hard-wearing, and highly resistant to the weather. EPDM handles temperature changes well without cracking and offers a long, low-maintenance lifespan, making it a popular modern choice.
Felt Roofing
The traditional flat roofing option, modern felt systems are applied in layers to create a reliable waterproof covering. Cost-effective and proven, felt remains a practical choice for garages, outbuildings, and budget-conscious projects.
Single Ply Membrane Roofing
A lightweight, high-performance membrane laid in large sheets with minimal seams. Single ply is durable, flexible, and well suited to larger flat roofs and commercial buildings where reliability over a big area matters.
Flat Roof Leaking or Past Its Best? Let's Take a Look.
A failing flat roof only lets in more water the longer it’s left. Get in touch and we’ll come out, assess it properly, and give you a straight answer on whether it needs a repair or a replacement — and which system is right for you.
It depends on the system. A quality GRP fibreglass or EPDM rubber roof can last for decades when it's installed properly, while single ply membranes also offer a long, reliable lifespan. Traditional felt roofs tend to have a shorter life but are more budget-friendly. Whatever the material, correct installation is what makes the difference — which is why our new flat roofs come with a 10-year guarantee.
There's no single "best" — it depends on your building, budget, and how the roof is used. GRP fibreglass is tough and seamless and lasts a long time; EPDM rubber is flexible, low-maintenance, and handles temperature changes well; felt is proven and cost-effective for garages and outbuildings; and single ply suits larger or commercial roofs. When we come out for your free inspection, we'll recommend the right system for your specific roof rather than a one-size-fits-all answer.
Many flat roof problems — cracks, splits, blisters, failed seams, or damaged flashing — can be repaired if they're caught early. But if the roof is old, leaking in several places, or the decking underneath has started to rot, a replacement is the better long-term fix. We'll assess it honestly during your free inspection and tell you which option genuinely makes sense, not just the bigger job.
That's called ponding, and it happens when a flat roof doesn't drain properly — often due to sagging, poor original installation, or a blocked outlet. A small amount of standing water isn't always a crisis, but persistent ponding puts extra stress on the waterproof layer and speeds up wear. If water is regularly sitting on your roof, it's worth having it looked at before it leads to leaks.
Yes. Flat roof leaks can be tricky because water often travels along the decking before showing up on the ceiling, so the stain inside is rarely directly under the actual entry point. With 25 years of experience, we know where flat roofs typically fail — seams, flashing, blisters, and worn membrane are all common culprits. We'll track down the real source and fix the cause, not just patch the symptom.
Yes. We stand over every job we do. New flat roofs come with a 10-year guarantee, and all our repair work carries a satisfaction guarantee — if you're not happy with it, we'll come back and put it right, free of charge. On top of that, our whole team is fully qualified, licensed and insured, so you're covered from start to finish. If it's not right, we make it right.