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Flat roofs are an essential part of many modern extensions, garages, and commercial properties across Dublin. However, when they fail, they fail quickly—leading to pooling water, structural damp, and major leaks.
At Capital Roofers, we are Dublin’s trusted experts in diagnosing and permanently fixing flat roof issues. We specialise in all major flat roof systems—including torch-on felt, fibreglass (GRP), and EPDM rubber—ensuring your roof is watertight, durable, and built to last.
Unlike pitched roofs, flat roofs rely on a completely sealed, seamless membrane to repel water. This membrane is vulnerable to blistering, cracking, and damage from debris or UV exposure. Once the seal is broken, water penetration is inevitable and can quickly damage the underlying decking and structure.
Don't ignore the warning signs. A quick repair today saves you the cost and stress of a full re-decking or structural repair tomorrow.
Pooling/Standing Water: We repair poor drainage and structural sagging that leads to dangerous water build-up.
Blistering & Cracking: Repairing bubbles or splits in the felt or membrane caused by trapped moisture or UV damage.
Flashing Failure: Sealing leaks around skylights, vents, parapet walls, and adjoining buildings.
Perimeter Leaks: Re-securing or sealing felt and membrane where they terminate at the edges (fascia/gutters).
Puncture Damage: Repairing holes caused by falling debris or foot traffic.
Flat roof repair requires a different skill set than traditional slating—it demands precision, technical knowledge of membranes, and meticulous sealing. We specialise in these systems.
Flat Roof Specialists: Our team is trained specifically in modern and traditional flat roof installation and repair, eliminating the guesswork associated with general contractors.
Durability Focus: We don't just patch the visible leak; we fix the underlying cause (e.g., poor drainage) to prevent immediate recurrence.
Transparent Solutions: If your flat roof only needs a repair, we'll tell you. If it's time for a full replacement (often the case for old, brittle felt), we'll provide clear, competitive pricing for a new system.
Guaranteed Quality: All our flat roof repairs are backed by a strong written guarantee, confirming the work and materials will stand up to the Irish climate.
Need a Full Flat Roof Replacement?
If your roof is old, badly maintained, and constantly leaking, a full replacement may be the most cost-effective long-term solution. We install new, high-performance systems:
High-Performance Torch-On Felt (Multi-layer systems)
Durable GRP/Fibreglass (Seamless, hard-wearing finish)
Flexible EPDM Rubber (Long lifespan, minimal joints)
Blisters and bubbles are often caused by trapped moisture or air beneath the felt membrane. When the sun heats the roof, this trapped vapour expands, creating a pocket. If left untreated, these areas weaken the membrane and can eventually split, leading to leaks. At Capital Roofers, we carefully cut out the blister, dry the area completely, and apply a professional repair patch or a new section of felt using heat welding to create a durable, permanent seal.
Yes, we are specialists in all three major flat roof systems used in Dublin. Torch-on felt is common on older structures; we use modern, high-grade felt for durable patches. Fibreglass (GRP) repairs require specialist resin and matting techniques. EPDM rubber demands specific primers and tapes to maintain its seamless, flexible properties. We match the repair method to your existing system to ensure compatibility and longevity.
Pooling or "standing water" is one of the biggest issues for flat roofs. While some minor ponding is normal, water sitting for more than 48 hours is a problem. It adds significant weight to the structure, encourages moss and algae growth, and degrades the membrane much faster than dry areas. If the pooling is due to the structure sagging, repair often involves addressing the underlying decking or improving the fall/drainage, not just patching the membrane. We assess the cause and provide a solution for optimal drainage.
Our goal is always a permanent fix. Unlike temporary liquid applications, we trace the leak to its source—which is often a failure at the edges, upstands, or around penetrations (like vents or skylights)—and repair the underlying membrane structurally. We use high-performance materials and professional heat-welding or bonding techniques. All our flat roof repairs come with a written guarantee because we are confident in the durability of our workmanship.
During our free inspection, we give you an honest appraisal. We typically recommend a full replacement if: the membrane is brittle and cracking in multiple places; the existing felt is severely aged and delaminating; or if the underlying timber decking shows signs of widespread rot or damp. If the cost of repairing numerous small leaks approaches the cost of a new, long-life system (like GRP or EPDM), replacement is the better long-term investment.
Get a free, no-obligation roof inspection and quote today.
We’ll assess the issue, show you photos of the problem areas, and provide a clear written estimate — no hidden surprises.
If you have any leaky roof problems that have to be fixed fast or a leak in your gutter, we are the local roofing company for you!
Capital Roofers is your trusted local roofing specialist, providing expert roof repairs, replacements, and guttering services across Dublin. High-quality roofing solutions built to last.
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