Roof valley flashing installation
- how wide should valley flashing be
- how wide should roof flashing be
- how wide should metal valley flashing be
- do roof valleys need flashing
How to roof a valley with architectural shingles!
Table of Contents
What are valley flashings?
Valley Flashing is an important component to your roofs flashing system. It protects the critical area of the roof where two slopes come together to form a valley.
Cut valley roof
When properly installed, this flashing will effectively direct the water run-off down the roof and into the gutters.
Do roof valleys need flashing?
While the appearance of where the roof decks meet to create the valley is a “V”, you want a “W” flashing instead because the middle hump stops water flowing down each side from shooting up under the shingles on the opposite side.
The metal can withstand about as much weathering as you can throw at it.
How wide should valley flashing be?
If not metal, the material must still be corrosion-resistant and non-staining. Also, at a minimum, valley flashing must be 24 inches (610 mm) wide.
Does underlayment go over valley flashing?
Recommended procedures of basic valley flashing installation: Install an underlayment centered in the roof valley.
Then, install a non-corrosive metal valley flashing of 24″ minimum width. Lap suc
- what is roof valley flashing