Only if the builder wants the best possible quality installed
Lead flashing.
Tin, lead or copper
They ARE used when quality and longevity is needed for leader lines, roof drain flashing material
One can install roof flashing by various steps. You can find these steps on several websites. A website you can look on for installing roof flashing is YouTube.
An apron flashing is a term used for a flashing located at the juncture of the top of a sloped roof and a vertical wall.
Prior to caulking the lead joint I use a level then pour the joint and tap each side of the lead so the drain does not shift then finish packing the lead and trim the lead with a trimming iron...same as for CI roof drains except roof drains are slightly counter sunk to allow for the 4 PSF sheet lead flashing
how to do lead flashing around a small bay
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Lead flashing is commonly used in the roofing industry and can cause lead contamination. Lead can cause problems with water systems if the flashing is not water tight.
A drawing that would show how high the flashing and counter flashing is going to be on a roof plus the various penetrations and pitch pockets and leader lines and possibly a scupper
flashing is usually done with tin, nails, and roofing cement.. I suggest you go to Youtube and in the Search Bar type in "flashing A Roof"-- check out the insightful How -To -Videos.
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