Complete Re-Roof for a 3-Bed Semi in Dublin (2026)

Most 1990s roofs fail at battens and valleys. Not tiles.

That surprises people. They stare at the tiles, looking for cracks. Meanwhile, the real damage is underneath: rotten battens, split felt, and valley troughs that gave up five winters ago.

If you own a 3-bed semi in Dublin built between 1985 and 2005, there is a strong chance your roof is closer to failure than it looks from the ground. We know this because we do this job constantly. It is one of the most common projects we run across Dublin 15, Blanchardstown, Castleknock, Clonsilla, and surrounding areas.

This guide covers exactly what a complete re-roof involves in 2026, what the timeline looks like, and why homeowners keep coming back to us for this specific job.

Quick Answer

A complete re-roof for a Dublin 3-bed semi in 2026 typically involves:

1. Full strip-back, deck inspection, and rotten timber replacement
2. New breathable membrane and treated battens throughout
3. Valley trough rebuilds with proper lead detailing
4. Ridge and verge rebuild (or dry system upgrade)
5. Chimney flashing renewal with code-weight lead
6. New tile or slate installation with storm-rated fixings
7. Full scaffold, site protection, waste disposal, and cleanup
8. A 7–10 working day timeline, weather dependent

Keep reading for the full breakdown, the hidden failures we find most, and why 5-star reviews keep landing after these jobs.

Founder's Note

A note from the Founder of Secure Top Roofing. We re-roof Dublin semis every single month. After years of stripping back roofs built in the 1990s, the pattern is always the same: the tiles look serviceable, but what's underneath has been quietly failing for years. That's the part most homeowners never see until water shows up inside. This guide is built from hundreds of these jobs. Every section reflects what we actually find, not theory.

Why 1990s Roofs Fail at Battens and Valleys (Not Tiles)

Here's the deal. The tiles on a 1990s semi were often decent quality. Concrete tiles from that era can last 40+ years on the surface.

But the infrastructure beneath them? Different story entirely.

Battens were often untreated

Through the late 1980s and into the mid-1990s, many Dublin builders used untreated or lightly treated battens. After 25–30 years of Irish weather, those battens soften, swell, and lose grip on the fixings.

When battens fail, tiles shift. When tiles shift, water finds a way in. The batten is the silent failure point most homeowners never suspect.

Valley troughs were lined with mineral felt, not lead

Valleys are where two roof slopes meet. They carry a huge volume of water during heavy rain. On many 1990s Dublin semis, these valleys were lined with cheap mineral felt instead of proper lead.

That felt degrades. It cracks. It lets water seep into the timber beneath. By 2026, many of these original valleys have been leaking quietly for years.

The felt beneath the tiles has reached end of life

Traditional non-breathable sarking felt was standard on most 1990s builds. After 25–30 years, it becomes brittle, tears around nail holes, and stops doing the one job it was installed to do: keep water out when tiles fail.

Dublin's 750mm+ annual rainfall doesn't wait for you to notice.

What a Complete Re-Roof Actually Includes (Line by Line)

This is the scope you should see on every serious re-roof quote. If any of these items are missing, ask why.

1. Full Strip-Back and Deck Inspection

We remove every tile, strip the old felt and battens, and inspect every rafter and board. This is the only way to find hidden rot, soft timber, and failed fixings.

Skipping this step is how other roofers miss the real problem.

2. Timber Repairs Where Needed

If rafters are soft, fascia boards are rotten, or decking has weakened, we replace it before anything new goes on top. You cannot build a 30-year roof on a 30-year-old failure.

3. New Breathable Membrane and Treated Battens

Modern breathable membrane replaces old non-breathable felt. It lets moisture escape from the attic while keeping rain out. Treated battens go on top, spaced and fixed to current standards.

This layer is the real waterproof barrier on your roof. Not the tiles.

4. Valley Rebuilds with Proper Lead

We strip old valleys and re-line them with code-weight lead, dressed and sealed correctly. This is the detail that stops most Dublin re-roof leaks.

Lead valleys last decades when fitted properly. Mineral felt valleys do not.

5. Ridge, Verge, and Hip Finishing

We rebuild ridges with mortar or upgrade to dry ridge systems. Verges get capped or upgraded to dry verge. Hips are re-dressed and sealed.

These finishing details take the brunt of wind-driven rain. Rushing them is the number-one way to create callbacks.

6. Chimney Flashing Renewal

Old chimney flashings crack, pull away, and let water track behind. We strip and re-flash with proper stepped lead, tucked and sealed into raked mortar joints.

This is where many chimney and valley leak repairs start and end.

7. New Tile or Slate Installation

Your new covering goes on with storm-rated fixings to current Irish standards. We match the aesthetic you want while making sure every tile holds through a Dublin winter.

8. Scaffold, Protection, Waste, and Cleanup

Full scaffold goes up before day one. We protect your driveway, garden, and walls. All waste is removed responsibly. You get a clean handover, not a skip in your front garden.

The 7–10 Day Timeline (What Happens and When)

A standard 3-bed semi complete re-roof in Dublin runs 7–10 working days. Weather can shift this, but this is the typical flow.

Days 1–2: Scaffold, Strip, and Inspect

Scaffold goes up. Old tiles, felt, and battens come off. We inspect every piece of timber and mark what needs replacing.

This is the messy phase. It's also the most important.

Days 3–4: Timber, Membrane, and Battens

Any rotten timber gets replaced. New breathable membrane goes down. Treated battens are fixed to every rafter at correct spacing.

By day four, your roof has a weatherproof base layer even before tiles go on.

Days 5–7: Tiles, Valleys, and Leadwork

New tiles or slates are laid row by row. Valleys get their lead lining. Chimney flashings are stripped and rebuilt.

This is where the craft shows. Proper lead detailing takes time. We don't rush it.

Days 8–9: Ridges, Verges, and Final Details

Ridges and verges are finished. Any dry ridge or dry verge upgrades are installed. Gutters are cleared and flow-tested.

Day 10: Quality Check and Handover

We walk every slope, check every fixing line, run water tests at flashings, and do a full clean. You get a handover with no loose ends.

Why We Keep Getting 5-Star Reviews for This Job

Let's be straight. We do this job a lot. It's one of our most common projects.

That means we've refined the process until the awkward parts aren't awkward anymore. The scoping is tight. The materials are pre-ordered. The schedule is tested.

Here's what homeowners tell us after a re-roof:

• "No surprises." We show you every issue during the strip-back. Nothing is hidden. Nothing gets added to the bill without a conversation.
• "They actually finished on time." Because we've done enough Dublin semis to know how long each phase takes.
• "They explained everything in plain English." No jargon. No pressure. Just a clear scope.
• "The leadwork was done properly." That's because we don't subcontract the hard parts. Our team does the lead detailing.

We've earned 5-star reviews across Google this year from re-roofs in Mulhuddart, Ongar, Tyrrelstown, and Ashtown. The feedback is consistent: scope was clear, the work was solid, and the finish was clean.

What homeowners keep saying: "I wish I'd done this two years ago instead of patching."

What Determines Your Re-Roof Cost in Dublin

We don't publish exact prices. Every roof is different. But we are completely transparent about what drives the final number.

Roof Size and Pitch

A steep roof takes longer and needs more safety setup. A larger footprint means more materials. Both affect cost.

Timber Condition

If the deck is sound, timber costs are minimal. If multiple rafters need replacing, that adds scope and time. We show you the damage before we quote the fix.

Material Choice

Concrete tiles, natural slate, and synthetic slate all have different price points. We walk you through options and let you choose without pressure.

Valley and Chimney Complexity

More valleys, more chimneys, more leadwork. Simple semi layouts cost less than complex hip-and-valley configurations.

Access and Scaffolding

Ground conditions, extensions, conservatories, and neighbouring walls all affect scaffold design and cost.

Our Local Advantage

By staying lean and local, we typically save homeowners 15 to 20 percent compared with larger, high-overhead roofing contractors. That's not a gimmick. It's the result of no sales team, no showroom, and no middle-management layer between your roof and the people fixing it.

Don't Patch a Roof That Needs Replacing

Here's where most homeowners lose money.

They patch a valley. Then they patch a ridge. Then they fix a leak near the chimney. Three separate call-outs, three separate quotes, and the underlying battens and felt are still failing.

A complete re-roof is one job, one scope, one timeline. It costs more upfront than a single patch. But it costs far less than four patches and a re-roof two years later.

Think about it this way: if the battens are soft and the felt is cracked, every patch you add is sitting on a failing foundation. The next storm tests the weakest link, not the newest tile.

If you're already spending money on repeat repairs in Phibsborough, Drumcondra, or anywhere across Dublin, it might be time to compare the total patch cost against a full re-roof.

Your Roof Has One Job. Make Sure It Can Still Do It.

If your 3-bed semi was built in the 1990s, your roof has done 25+ years of hard work in Dublin weather. The tiles might still look fine. The battens, felt, and valleys underneath probably don't.

A complete re-roof in 2026 gives you a fresh 30-year foundation: new membrane, treated battens, proper lead valleys, and a finished surface that's built for Irish weather.

We do this job more than almost any other. We're good at it. And the reviews show it.

Book a free inspection. We'll show you what's actually happening underneath, explain the scope in plain English, and give you a clear, fair quote with no pressure.