Swords, North Dublin
Domestic
Flat Roof Leak Repair — Swords, North Dublin
Full flat roof leak diagnosis and repair using a cold-applied liquid waterproofing system — eliminating water ingress to a rear-extension ceiling, correcting drainage falls and restoring a fully sealed roof surface for a homeowner in Swords, North Dublin.
Project Overview
| Service | Flat Roof Leak Repair |
|---|---|
| Location | Swords, North Dublin |
| Property Type | Domestic — Semi-detached (rear extension flat roof) |
| Material Used | Cold-applied liquid waterproofing membrane with reinforcing fleece |
| Additional | Drainage correction & rainwater outlet clearance |
| Completion | 2026 |
What We Did
Full leak-trace inspection — following internal staining back to the actual roof penetration point rather than guessing from where water was showing inside
Removal of failed felt patches and previous bituminous repair attempts at the affected sections
Surface preparation including cleaning, drying and priming of the existing roof substrate
Application of a cold-applied liquid waterproofing system with reinforcing fleece across the full flat roof area
Reinforced detailing at upstands, around the rooflight kerb and at the junction with the main building wall
Clearance of a partially blocked rainwater outlet and adjustment of falls to remove standing water
Final water test and visual inspection to confirm the roof was fully sealed before sign-off
Site cleared and all waste removed on completion
The Issue
The homeowner in Swords contacted MJ Roofing & More after noticing brown staining and active dripping on the ceiling of their rear extension following a period of heavy rainfall in North Dublin. On arrival, our team carried out a full flat roof inspection and identified several problems:
- Ageing bituminous felt with multiple cracks and blisters along the lap joints
- Previous patch repairs that had lifted at the edges, allowing water to track underneath
- Standing water (ponding) in one section of the roof due to inadequate falls towards the outlet
- A partially blocked rainwater outlet preventing proper drainage during heavy rain
- Cracking and separation at the upstand where the flat roof meets the main building wall
- Internal ceiling staining and softening of plasterboard directly below the worst-affected are
Project Gallery
Click any image to view full size.
Outcome
The flat roof was left fully watertight, with the cold-applied liquid waterproofing system bonded seamlessly across the entire surface and over all upstands. Drainage was restored, falls were corrected so water now runs cleanly to the outlet, and every weak point was reinforced. A written summary of the works was provided to the homeowner along with notes on areas to monitor during routine roof maintenance checks. The interior ceiling can now be redecorated once the existing damp has fully dried out.
Swords, North Dublin
Related Services
Get a Free Quote — Swords & North Dublin
Dealing with a leaking flat roof in Swords, Malahide, Portmarnock or anywhere across North Dublin? Our team can be on site quickly to diagnose the source and put a permanent fix in place.
Call +353 85 848 3439 or email info@mjroofingandmore.ie to arrange a free, no-obligation quote.