Roof Repairs & Waterproofing in Dublin

We trace the leak to its true source before we touch a thing

Water rarely enters where it shows on the ceiling. It runs along battens, rafters and felt and drips metres from the actual breach. Our roofer reads the run of the water, checks the high side of every penetration, and where needed uses moisture and thermal checks to map damp trapped under a flat roof membrane. We fix the entry point, not the stain, so the leak does not simply reappear two slates over.

Flashings are replaced and dressed, never just smeared with tar

Chimneys, abutments, valleys and roof-detail junctions are where most roofs fail. We renew tired lead or code-correct flashing, dress it properly into the brickwork or step-and-cover the detail, and point it back in. Black bituminous tar slapped over a failing flashing looks fixed for a season then cracks and lifts. A correctly formed and dressed flashing channels water away for years, which is the difference between a patch and a repair.

Slipped slates and tiles are mechanically re-fixed with copper tingles

A slipped slate gets re-secured with a copper or stainless tingle, the new slate eased into the gauge and the tingle turned over its lower edge to lock it. We never bed a slate in silicone or daub it in mortar as a shortcut, because that traps moisture, expands and contracts, and fails within a season or two. Mechanical fixing is the only repair that lasts, and it leaves the roof looking as it should.

Flat roofs get a primed, seamless liquid membrane, including certified Lava 20

On a flat roof we prepare the deck so the system can actually bond: sound, clean, dry and free of loose debris, with cracks and blisters made good first. Then the correct substrate-specific primer goes down before a cold-applied, seamless liquid waterproofing layer such as certified Lava 20 liquid membrane. No joints, no welds, no hot works, no weak points for water to find. Skip the primer or the prep and the best membrane in the world peels at the edges.

Gutters, fascia and the whole drainage line are put right together

A leaking roof is often a drainage problem in disguise. We clear and re-fall gutters, re-seal or replace failed joints and brackets, and repair rotten fascia and soffit so water leaves the roof cleanly instead of tracking back behind the boards. Sorting the roof and the drainage in one visit is what stops the damp coming back through a different door.

Sealing tar or generic mastic straight over a cracked flashing or a wet, dusty surface

The cost: It bonds to nothing, peels back at the corners within months, and water creeps in behind it, so you pay for the bodge, then pay again for the proper flashing repair plus the ceiling and insulation the trapped water ruined in the meantime

Bedding a slipped slate in silicone or mortar instead of a mechanical tingle fixing

The cost: The seal heats and cools, flexes, and lets go in a season or two, so the slate slips again, often in the same storm that exposes the rest of the roof, and the recurring callouts cost far more than fixing it once with a copper tingle

Coating a flat roof with no primer and no surface prep, over damp or flaking substrate

The cost: The membrane never keys to the deck, blisters and lifts, and the leak returns with rot now spreading underneath, so the next roofer has to strip the failed coating before they can even start and you fund the job twice

Patching the visible damp patch without tracing where the water actually enters

The cost: The real breach is still open, so the ceiling stains again from a slightly different spot, with repeat callouts, repeat scaffolding or access charges, and a slowly rotting roof structure that turns a small repair into a re-roof