Believe or not this idea got a lot of resistance by local roofing contractors here in hampton roads virginia when i first proposed it.
Is it necessaryto replace flashing on roof if nothing wrongnwoth it.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
One of the most common things i heard was.
If there is nothing wrong with it leave it.
On a typical re roofing job where you are replacing an old or underperforming roof it is wise to replace all flashing.
Proper roof wall flashing example to install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width.
The only way to ensure the quality of the flashing is to replace it with new flashing and install it properly when the roof is replaced.
If this is the case with your home overlay the current drip edge with a new gutter apron and cut the bottom edge of it to accommodate the spikes.
Most of the time when you remove the old roof material the drip edge is damaged.
Periodically inspect your roof for any signs that the integrity of the structure has been compromised.
Anyplace where the roof plane meets a vertical wall such as a dormer a chimney or a split level roof flashing is necessary.
Once you roof flashing fails your roof will begin to leak water and cause major damage.
Old flashing may begin to fail before the new roof s lifespan is over.
That being said it isn t always necessary to replace flashing when conducting shingle repairs or replacements.
It s not always possible to remove the old flashing in these spots.
Roof flashing is the barrier between your home and the weather.
Your roofing contractor is try to protect his interest by not having to warrant another persons work.
Any evidence of roof leaks.
Maybe you had a leak in the roof once upon a time and you had it fixed and it didn t leak since.
Gutter flashing should almost always be replaced unless you don t want to remove decorative guttering because it is attached with spikes or screws through the existing drip edge.
If you see sagging then it is too late you and you will have to replace a major portion of your roof.
The flashing if metal does not break down and can be re used if the sealants that are subject to environmental break down are removed and re done.
