"I wanted to create a modified drip edge that would provide a more effective means of preventing water from seeping into any ...

nail the flashing to the roof as far up the flashing as possible. Cap flashing (counter flashing) inserted into mortar joints will cover the top edge. Run the base flashing 4 to 5 in. beyond the ...

They can detect problems such as missing or damaged shingles, deteriorating flashing ... can lead to water backing up under the edge of your roofing materials, causing rot and leaks.