Yes even flat roof to wall intersections are not being properly done.
How to seal roof to wall.
Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a.
Below are two photographs of roof wall step flashing completed and effective of a slate roof against a brick wall below left and in process with step flashing against a dormer sidewall before the dormer siding has been put in place below right.
Before attempting to get to the roof you must make sure that the ladder is secure.
To seal your roof flashing you first have to get on the roof.
The most common roof to wall intersections involve either a gable roof with its ridge running perpendicular to the wall or a shed roof that slopes downward away from the wall.
In order to do so safely you will need an extension ladder and rubber soled non slip shoes.
Proper roof wall abutment flashing examples.
Climbing a ladder and walking on the roof should only be done in shoes that will provide a great deal of.
Metal roof flashing is a galvanized sheet metal that is bent at a 90 degree angle about 8 to 12 inches on each side of the angle.
Providing the shed roof is at a steep enough angle to ensure the rain is not blown up the shed roof and over the top into the gap along the wall then the traditional lead flashing where the lead is let into the wall along a mortar line will do the trick.