Bending your own flashing on site usually produces wavy, crinkled pieces of sheet metal that make you wish you’d had them made up at a shop. Here’s a fixture you can make on the site that produces near-perfect results.
Using a jigsaw or keyhole saw, cut the fullsize cross section of the flashing you want to make into a plywood scrap that’s at least 18 in. across. Nail the plywood across the studs of an unsheathed partition at chest level. Then cut a piece of roll flashing to length and insert it into one side of the cut in the plywood. With one person pulling and another supporting and feeding the flashing, this fixture makes the job easy.
Mick Cappelletti, Newcastle, ME