A picture would do wonders for getting answers to your question. Usually step flashing followed by counter flashing...........but, every chimney is different & some require special work to properly flash them.

 

very carefully

 

I've put many of the details on my website, in my sig. Browse to your heart's content. I think you'll find all your answers there.

 

kskier, please post same question only once, thank you.


I see a pro roofer answered before me but I'll give you the link I found anyway:http://www.rumford.com/chimneys/flashing.html

Gary

 

kskier,

It depends on the type of chimney and roofing being installed. Here is a site with different chimney flashing examples.
A short chimney flashing video

And some links to the best videos for chimney flashing

 

As you can see, there are many styles. The critical areas are the corners. Like the 60 year old galvanized in the link, I much prefer the ole style with tinner's wings on the corners. The style dates back centuries before caulk was commonplace. No reliance on caulk or solder as the metal hides the corner detail from windblown rain and snow. It's ideal for rookies and your work can be less precise.
The devil is in the details. Step flashing needs to be bent less than 90 degrees and pushed into place. The steps must lap each other correctly. The corners must be protected.
The termination flashing on the first piece across the front of the chimney must be cut so it's 1/8" wider than the chimney to ensure a tight fit when that first step flashing rounds the corner. No gaps that way.

 

my looks like this:

 

my looks like this:

 

Where it is a chimney on the perimeter of the roof there`s nothing wrong with that method.

 

skirt

im looking at using flashing and forming a skirt at the outer area >its a 1 piece form for going across outer lowest point of chimney.Is this a good option with metal roofing?
I was looking at cutting grooves in flashing for water flow onto the wavy curves of roofing.Joining onto original flashing on sides with skirt 3 inches on sides.

 

picture

here is what i was speaking of

2011-10-15 22.45.50.jpg

 

that looks ok to me. as long as it serves its function well