How To Install Step Flashing Under Existing Siding

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How to install step flashing under existing siding.

Lay shingles over step flashing from the roof edge. Once even a small section of roofing cement fails you ll have a leak. How to install step flashing under siding 1. Lay a shingle over the step flashing starting at the roof edge.

Here s how to do it right the first time. Use roofing nails to install the l shaped flashing flush with the roof and wall then cover it with roofing cement and reattach the roofer s felt. Fasten that shingle with two galvanized nails at the. Nail through flashing into shingle do not extend flashing above top of shingle and.

Every single end should be covered with flashing. Galvanized sheet metal bent at a 90 degree angle i e. Longer than the shingle s exposure. Bent into an l shape.

Then nail the new l shaped flashing under the builder s felt but above the fascia board. This flashing is typically field fabricated from a sheet of 26 ga. You have to work up your roof and cover every single end suitable with shingles. Cover tops of step.

Slice along the bend line about 4 inches into the first piece of flashing at the bottom of the roof with tin snips. But it doesn t work that way. Cut a piece. Shingles need to be fastened with nails in the top area and then cover top with another step flashing piece with nails.

Cut step flashing pieces to be 10 in. It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. Posted march 4 2017 filed under roof installation roof repair maintenance.