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Flat roofs · Dublin

Full Flat Roof Leak Repair with Mariseal 250 in Dublin

A leaking flat roof in Dublin needed more than a local patch. We prepared the full roof area and applied Mariseal 250 across the surface, edges and upstands to create a continuous waterproof membrane.

Completed Dublin flat roof covered with a continuous grey Mariseal 250 liquid waterproofing membrane
The completed flat roof after full-surface waterproofing with Mariseal 250.

What needed attention

The existing flat roof was leaking, with widespread surface wear and standing water visible across parts of the covering during inspection. The customer needed a complete repair rather than another localised patch over one suspected leak point.

How we approached it

We prepared the full flat-roof area and detailed the perimeter edges, wall junctions and upstands before applying Mariseal 250, a hard-wearing liquid-applied polyurethane waterproofing membrane. The system was carried continuously across the main roof surface and its vulnerable junctions rather than being limited to a small patch.

The finished work

The completed roof has a continuous grey waterproofing membrane across the full surface, with the edges and upstands incorporated into the treatment. This full-roof approach renewed the waterproofing layer and delivered a complete repair instead of a temporary patch.

The job, in photographs

From first look to finishing details

Wide inspection view of the leaking Dublin flat roof before the Mariseal 250 repair
01 / BeforeBefore: the existing flat-roof surface during the initial inspection.
Full length of the worn flat-roof covering with standing water visible before repair
02 / BeforeBefore: widespread wear and standing water across the existing covering.
Wide view of standing water on the leaking flat roof before full-surface waterproofing
03 / BeforeBefore: water sitting across parts of the flat roof prior to the complete repair.
Inspection view of the flat-roof edge and junction with neighbouring tiled roofs before repair
04 / BeforeBefore: the roof edge and adjoining junctions that needed to be included in the waterproofing work.
Standing water beside the wall and upstand on the leaking flat roof before repair
05 / BeforeBefore: ponding at the wall junction and across the existing roof surface.
Completed Mariseal 250 liquid membrane covering the Dublin flat roof and perimeter details
06 / CompletedAfter: continuous Mariseal 250 coverage across the roof, edges and wall upstands.
Close wide view of the completed grey Mariseal 250 waterproofing membrane on the flat roof
07 / CompletedAfter: the finished liquid membrane forming a continuous surface across the roof.
Completed full-surface flat-roof repair showing the Mariseal 250 membrane after application
08 / CompletedAfter: the renewed waterproofing layer across the complete flat-roof area.
Completed Mariseal 250 detailing along the flat-roof edges, wall junction and upstands
09 / CompletedAfter: the membrane carried into the perimeter edges and wall junctions.

Your roof, our next conversation

Planning similar work?

Tell us what needs attention. We’ll explain the next step and arrange a roof assessment.