How to install flashing on metal roof. Use roofing nails to install the l shaped flashing flush with the roof and wall then cover it with roofing cement and reattach the roofers felt. Before a metal roof can be installed we have to install the water barrier which will act as an additional protection underneath the metal roof. Then nail the new l shaped flashing under the builders felt but above the fascia board.
At any overhangs install your drip edge over the felt and fascia to protect the felt from the wind and rain. Learn how to install flashing behind hardie plank siding on to of a metal roof over shingles. Such a water barrier is designed to protect the roof decking from water that occurs from condensation due to temperature differences.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again. How to install roof flashing against a wall. Cover the nail heads with roofing cement and stick the felt down.
Step flashing redirects the water back onto the shingle.