Lead Roof Valley Repair on Slate Roof in Lucan, Dublin

The homeowner in Lucan contacted MJ Roofing & More after noticing signs of water ingress during periods of heavy rain. The leak appeared to be coming from the valley area where two slate roof slopes meet. On inspection, our team found that the existing valley detail had deteriorated and was no longer directing rainwater away from the roof correctly. Roof valleys are one of the highest-risk areas on a property because they collect large volumes of water from two roof slopes. Any failure in the valley lining, slate cuts or supporting battens can quickly lead to leaks. The inspection identified several issues:

• The existing valley lining had reached the end of its serviceable life
• Slates around the valley were allowing water to track beneath the roof covering
• The underlay and battens beneath the valley area required renewal
• The roof valley had become vulnerable to leaks during heavy rainfall
• Moss and debris on the slate roof were increasing water retention around the affected area
• Previous weathering had left the valley junction less secure than required

If left unresolved, a leaking roof valley can allow water into the roof space, damaging insulation, ceilings, rafters and internal plasterwork. A professional roof valley repair was therefore required to restore the correct drainage route and prevent further moisture penetration.