Flat Roof Replacement with Skylight Installation in Smithfield, Dublin 7

The homeowner in Smithfield contacted MJ Roofing & More after experiencing water ingress from the rear extension roof. The existing flat roof had failed in several areas, and internal staining was visible around the ceiling and wall junction below. After opening the roof, our team found more significant damage than could be seen from the outside. The flat roof covering had allowed water to penetrate into the timber build-up over a prolonged period, affecting the roof deck, joists and insulation. The inspection identified several problems:

• The existing flat roof covering had deteriorated and was no longer watertight
• Water had penetrated into the roof structure and damaged sections of timber
• Insulation had become wet and contaminated in affected areas
• Internal staining showed that the leak had already reached the room below
• The previous rooflight detail was vulnerable to further water ingress
• The junction between the flat roof and adjoining slate roof required careful sealing
• The flat roof deck needed replacement before any new waterproofing could be applied

Because the roof structure had already suffered moisture damage, a simple surface repair would not have been suitable. The affected roof area needed to be stripped back, repaired structurally, re-boarded and fully waterproofed.