Header Flashing for Windows and Doors

Old 01-23-13, 05:10 PM
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Header Flashing for Windows and Doors

What is the latest best practice for header flashing?
How far should the drip edge project out past the brick mold?
How much slope should the flashing have?
Are the Canadian end dams really necessary?

I have seen the flashing ends flush with the edge of the window, some longer and bend down along the edge of the window, and the Canadian version bent up to form the end dam.

Check out the video:

Header Flashing End Dams for Windows and Doors
Old 01-23-13, 05:34 PM
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I think you found the best practice for metal drip caps. Ingenious. Thanks for sharing that link.

The drip edge doesn't need to project out past the brickmould (in front) any certain amount, it just needs to have a downward turn so that water can't blow back on top of the trim. IMO, drip caps ought to have a minimum of a 7 angle to ensure that 100% of the water runs off and doesn't pool.

IMO, yes the upturn on the ends of drip caps helps seal a tricky area that often leaks. Canada seems to always be ahead of the USA on codes.

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