Why these areas leak
- Corrosion or physical damage
- Poor laps or termination details
- Sealant deterioration
- Debris holding water
- Movement at roof and wall junctions
- Fastener or fixing failure
- Previous incompatible repairs
Valleys carry concentrated flow
A valley can collect water from two roof planes. Blockage, rust, displacement or adjacent broken tiles may cause overflow or entry, especially during intense Joondalup rain.
Flashing is a system detail
Simply adding sealant may not correct an incorrectly formed, terminated or lapped flashing. The geometry and material condition must be understood first.