Why is this better?
Leska's custom flashing is the perfect way to ensure that you don't end up with the problems that lax roofing practices could leave you with.
Many roofers will flash penetrations (chimneys, vents, dormers, etc.) by cutting ill-fitting sheets that are close to the size of your chimney and caulking them to make them water resistant. The only problem here is that the only thing protecting your home is the quarter inch of caulk that the roofer pressed over the hole in the roof. Once the caulk degrades, you'll have a pernicious pinhole (sometimes bigger) leak that will lead way to rust, rot, and freeze thaw damage.
When we do our flashing, each piece of flashing is folded as you would origami, so that there are no holes in the sheet. With this method, not only do we not need caulk, but even without the caulk, there will not be any leaks!