Either the screws anchoring it into place become loose and pull out or the metal wears away from around the edge of the hole where the flashing was initially locked down.
Fladhing of roof loose.
Either way that leaves flashing loose and unable to properly perform its job.
Fasten loose nails and cover exposed nail heads with roofing cement.
Check the flashing as well as the condition of your roof shingles.
Look for loose nails and any damage to the seals at the edges of the flashing.
However it s important to check for damage anyway.
Roofing cement can dry out and crumble away exposing joints to water.
Always be aware of where you re standing on the.
Doing nothing there are some things you want to avoid doing when it comes to roof flashing.
Because flashing tends to be used where there is heavy water flow leaking flashing can funnel streams of water into a house.
Always check the roof flashing and the condition of the shingles whenever you clean your gutters.
If you find damage then you will have to get it.
Look carefully for loose nails and holes as well as the seals at the edges of the flashing.
Flashing is l shaped material often metal that wraps the outside edges or a flexible piece of adhesive stripping laid down for v shaped points such as where two different angles of a roof meet.
Being careless use a safety harness or a spotter to avoid falls.
How to repair roof flashing step one.
Doing a sloppy job.
When working with step flashing this may involve removing undamaged pieces of flashing as well.