How long does a flat roof installation take in Dublin?

Most residential flat roofs in Dublin 15 take 2-4 days to complete. A small garage or extension (10-15m²) typically takes 1-2 days, while larger extensions or commercial flat roofs (30m²+) take 3-5 days. Weather is the main variable - we can't install certain materials in heavy rain. We'll give you an accurate timeline after inspecting your roof and checking the forecast.

Flat Roof Repair & Install Dublin

Why Flat Roofs Need Specialist Attention in Dublin

Flat roofs on extensions, garages, and modern Dublin homes face unique challenges. Unlike pitched roofs where water runs off quickly, flat roofs rely on perfect waterproofing and proper drainage to prevent leaks. Dublin's 750mm annual rainfall, temperature swings, and UV exposure mean cheap materials or poor installation fail within years.

Since 2017, Secure Top Roofing has installed over 150 flat roofs across Dublin 15, Castleknock, and Blanchardstown. We've seen every type of flat roof failure - from pooling water on poorly graded surfaces to catastrophic leaks from 15-year-old felt that should have been replaced years ago.

Common Flat Roof Problems We Fix Daily

Pooling water: Poor drainage causing accelerated deterioration
Blistering and cracking: UV and temperature damage to aged felt
Seam failures: Joints separating on torch-on felt systems
Flashing problems: Water penetrating at roof edges and upstands
Complete breakdown: Roofs beyond economical repair (20+ years old)

The right flat roofing system for Dublin combines waterproof integrity, flexibility to handle movement, and UV resistance. We only install proven materials - EPDM rubber (our most popular choice), fibreglass GRP for complex shapes, and premium torch-on felt for budget-conscious projects. No cheap shortcuts that fail in 5 years.

Flat roof repair specialist working on EPDM installation in Dublin 15

Flat Roofing Systems We Install & Repair in Dublin

Choosing the right flat roof system depends on your roof condition, budget, and whether you need repair or full replacement. We specialize in Mariseal 250 liquid roofing - Ireland's most trusted flat roof waterproofing system - and also offer traditional systems for complete replacements.

OUR SPECIALTY

Mariseal 250 Liquid Roofing

Premium cold-applied liquid waterproofing system that forms a seamless, flexible membrane. The most popular flat roof repair solution in Ireland, perfect for Dublin's wet climate.

Key Benefits:

• 20+ year lifespan with excellent durability
• Completely seamless (no joints to fail)
• Flexible - moves with roof structure
• Quick application - minimal disruption
• Perfect for repairs and waterproofing existing roofs

Best For:

Leaking flat roofs, extension roofs, garage roofs, balconies - any flat roof needing reliable waterproofing

Typical Cost:

From €80/m²

EPDM rubber flat roof installation in Dublin

EPDM Rubber Roofing

Single-ply rubber membrane system that's completely waterproof and flexible. Good for full flat roof replacements on extensions and garages.

Key Benefits:

• 30-50 year lifespan
• UV and ozone resistant
• Quick installation
• Low maintenance

Best For:

Full flat roof replacements on extensions, garages, and dormers

Typical Cost:

From €120/m²

GRP fibreglass flat roof installation in Dublin

GRP Fibreglass & Traditional Systems

Fibreglass and torch-on felt systems available for specific applications. Suitable for certain roof types and budgets.

Key Benefits:

• Fibreglass: seamless and impact resistant
• Torch-on felt: proven track record
• Various options to suit different budgets
• 15-30 year lifespan depending on system

Best For:

Specific applications where alternative systems are suitable

Typical Cost:

From €70/m²

Our Recommendation for Most Dublin Flat Roofs

We recommend Mariseal 250 liquid roofing for the majority of flat roof repairs and waterproofing projects in Dublin. It's the most popular flat roof solution in Ireland for good reason - it's reliable, long-lasting, and perfect for our wet climate.

Mariseal 250 is perfect for:

✓ Leaking flat roofs needing waterproofing
✓ Extension and garage roofs
✓ Balconies and small flat areas
✓ Repairs to existing felt or EPDM roofs

Why we prefer Mariseal 250:

✓ Completely seamless - no joints to fail
✓ Quick application with minimal disruption
✓ 20+ year lifespan
✓ Proven performance in Irish conditions

Common Flat Roof Problems We Fix Across Dublin

Over the years, we've repaired hundreds of flat roofs across Dublin 15. These are the most common problems we encounter and how we permanently solve them.

Pooling Water (Ponding)

Water sitting on your flat roof for more than 48 hours after rain indicates poor drainage. This accelerates material breakdown and leads to leaks within 2-3 years.

Our Solution:

We install tapered insulation boards to create proper drainage falls (minimum 1:40 gradient), ensure outlets are correctly positioned, and if necessary, adjust the roof structure to eliminate low spots permanently.

Blistering and Cracking

Bubbles (blisters) in felt roofing indicate trapped moisture or air beneath the surface. These eventually crack and leak, especially after Dublin's freeze-thaw cycles.

Our Solution:

Small blisters can be cut out and patched if the roof is otherwise sound. Widespread blistering means the felt has failed and needs complete replacement with EPDM or fresh felt, depending on your budget.

Seam and Joint Failures

Torch-on felt seams can separate over time, especially at roof edges and around penetrations. These are prime leak entry points during heavy Dublin rain.

Our Solution:

We thoroughly clean and re-seal failed seams using compatible materials. If multiple seams are failing, we often recommend upgrading to EPDM which has far fewer seams and better long-term reliability.

Flashing and Edge Problems

Where your flat roof meets walls (upstands), parapets, or roof edges, the flashing must create a watertight seal. Failed flashings cause leaks down interior walls.

Our Solution:

We install proper lead or EPDM flashings with mechanical fixings and weatherproof seals. All upstands are checked for correct height (150mm minimum) and secure attachment to prevent wind damage.

Why Choose Secure Top Roofing for Flat Roof Repair & Installation?

Flat Roof Specialists
We've installed over 150 flat roofs across Dublin 15 since 2017. We work exclusively with proven systems - EPDM rubber, fibreglass GRP, and premium torch-on felt. No shortcuts, no cheap materials that fail in 5 years.
Proper Drainage Design
Pooling water is the enemy of flat roofs. We always check and correct drainage falls, install adequate outlets, and use tapered insulation where needed. A flat roof that sheds water properly lasts decades longer.
Dublin Weather Experience
Dublin's 750mm annual rainfall and temperature swings demand materials that handle moisture and movement. We only recommend systems proven to perform in Irish conditions over 20+ years.

10-Year Workmanship Guarantee
Every flat roof installation carries our 10-year workmanship guarantee, plus manufacturer warranties up to 20 years. You get comprehensive documentation for insurance and future property sales.
Transparent Fixed Pricing
After inspecting your roof, we provide a detailed fixed-price quote covering materials, labour, waste disposal, and guarantees. No hidden extras, no surprise costs when we finish.
Fast Turnaround
Most residential flat roofs are completed in 2-4 days. We schedule around Dublin's weather windows, order materials in advance, and keep you informed throughout. Minimal disruption to your daily routine.

Our Flat Roof Solutions in Dublin

Every flat roof is different. Below are our common project types, from targeted repairs to full rebuilds. For a detailed, fixed-price quote based on your specific needs, we offer a free, no-obligation site survey.

Leak Stop & Overlay (10-15m²)

Garage or compact extension with diagnostics and seamless overlay

• Thermal imaging & moisture readings
• Damaged decking sections replaced
• Seamless liquid membrane or GRP finish
• New edge trims, outlets & flashings
• All labour, materials & disposal
• 10-year workmanship guarantee

Full Warm Roof Rebuild (18-25m²)

Typical kitchen or living extension rebuilt with insulation upgrades

• Deck strip-out & vapour control
• Warm roof insulation upgrade
• Liquid membrane / EPDM / GRP options
• Drainage and fall correction
• Comprehensive documentation
• Manufacturer-backed warranties

Large / Complex Roofs (30m²+)

Wrap-around extensions or commercial roofs

• Detailed planning & access management
• Structural repairs & insulation upgrades
• Premium seamless membrane or hybrid systems
• Multiple outlets, parapets & rooflight details
• 3-4 day professional installation team
• Extended guarantee & maintenance plan

What Affects Your Final Quote:

• Total roof size (square metres)
• System chosen (Mariseal 250, EPDM, etc.)
• Underlying deck or insulation damage
• Access difficulty and scaffolding needs
• Drainage correction requirements
• Number of pipes, vents, and skylights

For an accurate, fixed-price quote, book your free site survey today. No hidden costs, guaranteed.

Common Questions About Flat Roof Repair in Dublin

For repairs and waterproofing existing flat roofs, we specialize in Mariseal 250 liquid roofing - a premium cold-applied system that's extremely popular in Ireland. It forms a seamless, flexible waterproof membrane that's perfect for Dublin's wet climate and lasts 20+ years. For full roof replacements, EPDM rubber roofing is an excellent option. The choice depends on your roof condition, budget, and whether you need repair or replacement.

It depends on the damage extent and your roof's age. Small leaks, blisters, or localised damage on roofs under 15 years old can usually be repaired effectively. However, if your flat roof is 20+ years old, has multiple leak points, extensive cracking, or pooling water issues, replacement is typically more cost-effective long-term. We provide honest assessments - if a repair will genuinely solve your problem, we'll recommend that over replacement.

Flat roofs should actually have a slight gradient (1:40 minimum) to allow water to run off. Pooling happens when the roof structure has sagged, the original installation was poorly designed, or insulation has compressed over time. Standing water accelerates material breakdown and leads to leaks. We can often fix this by installing tapered insulation boards to create proper drainage falls, or in severe cases, adjusting the roof structure itself.

Flat roof repair pricing depends heavily on roof size, condition, access, and materials chosen. Small leak repairs start from €200. Medium repairs with Mariseal 250 liquid roofing start from €600. Complete flat roof replacements start from €1,500 for small roofs, increasing based on size and system chosen. Premium systems like Mariseal 250 cost more upfront but provide superior longevity and performance. We provide detailed fixed-price quotes after inspecting your specific roof.

Absolutely. We provide a 10-year workmanship guarantee on all flat roof installations, and the materials carry manufacturer warranties - typically 20 years for EPDM, 15 years for fibreglass GRP, and 10 years for torch-on felt. These guarantees are only valid if the roof is properly maintained (we provide maintenance guidelines). Some insurance companies require proof of professional installation with guarantees for coverage.

Flat Roof Services Across Dublin 15 & Surrounding Areas

Secure Top Roofing provides professional flat roof repair and installation throughout Dublin 15 and neighbouring areas. Our local knowledge ensures your flat roof is designed and installed to handle Dublin's specific weather challenges.

Blanchardstown

Castleknock

Clonsilla

Mulhuddart

Tyrrelstown

Ongar

Carpenterstown

Dunboyne

Ashtown

Cabra

Finglas

Dublin 7

Call 089 255 7199 to discuss your flat roof project

Get Your Flat Roof Fixed Properly - First Time

No more patching and hoping. Secure Top Roofing installs proven flat roofing systems that handle Dublin weather and last decades. Free inspection and fixed-price quote - no pressure, no surprises.

Get Your Free Quote Call 089 255 7199

Flat Roof Repair & Installation Dublin
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