If the roof runs flat up against the brick wall you must install the roof side of the flashing either under the last layer of shingles or over the roof material if it is metal.
How to install roof flashing against a brick wall.
4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.
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.
Follow the photo for illustrated instructions.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
Do not fasten the flashing to the wall because it must float with the roof.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
You have to install the roof side of the flashing either under the last layer of shingles or over the roof materials if the roof runs flat up against a brick wall.
Place the first step flashing strip over the end of the starter course shingle and use two nails to fasten the step flashing to the roof with 2 nails.
Step 3 flashing angled roofs with the step method you can use the step method to flash an angled roof.
Each flashing job is a little bit different and depends on the type of material that the exterior of your house is made of.
Now install the kickout flashing and step flashings up the roof as needed.
Flat roof and flashing against brick wall install base flashing under shingles or over metal roofing material.
However the principles are the s.