It is a bit like deciding whether to lace a valley or use exposed
flashing in a valley. They can each work. Some issues are
aesthetic. The continuous flash require more attention to detail,
sealing the bottom of the flashing, cutting back the tops of the
shingles, sealing the shingles.

The step flashing does not require special practices or changing
tools or methods for the roofer.

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______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)




"gntry" wrote in message
news:5iEyj.3173$6R.2699@trnddc04...
what would be the draw backs to using one full piece of 12"
flashing folded to 6" instead of seperate step flashing when
installing new roofing shingles on an addition where it butts up
against an existing vertical wall of the house? The flashing
will be behind siding.