Flashing fasteners at the wrong spacing
A fixing interval is a specification, not a suggestion.
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In short: Apron flashing fastened at 500 mm centres on a Marsden Park job.
What an apron flashing does
Closes the junction where a roof meets a wall, shedding water away from the joint.
What we recorded
Fasteners at 500 millimetre spacing on a Marsden Park apron flashing, wider than the requirement.
Why spacing matters
Between fasteners the flashing can lift and flex in wind, and a lifting edge is where wind driven rain gets underneath.
How it fails
Slowly. Water works into the joint, then the substrate behind it, long after anyone connects it to the roof.
The fix
Additional fasteners at the specified interval, straightforward while access is still available.
Written by our local inspection team from work carried out in Marsden Park. Licensed building practitioners.
