Chimney flashing
The junction between a chimney and the roof is one of the most common leak sources, since it's where two different materials meet and rely entirely on flashing to stay sealed.
Valleys
Where two roof slopes meet, water concentrates and flows faster than anywhere else on the roof — any weakness in a valley gets tested every time it rains.
Roof windows and skylights
The seal and flashing around any roof window is a manufactured junction that can fail over time, particularly if it wasn't installed with a proper flashing kit originally.
Where a flat roof meets a pitched roof
This transition point sees a lot of movement between different roof structures, which puts real strain on the flashing detail that bridges them.
Gutters and eaves
Blocked or damaged guttering can cause water to back up under roof tiles at the eaves, rather than draining away as intended.
Knowing these hotspots means we can check the likely culprits fast during a leak survey, rather than starting from scratch.