How To Install Step Flashing Under Existing Siding

Posted march 4 2017 filed under roof installation roof repair maintenance.

How to install step flashing under existing siding. Nail flashing to roof deck only. This flashing is typically field fabricated from a sheet of 26 ga. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. But it doesn t work that way.

Fasten that shingle with two galvanized nails at the. It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Then nail the new l shaped flashing under the builder s felt but above the fascia board. You have to work up your roof and cover every single end suitable with shingles.

Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture. 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. Galvanized sheet metal bent at a 90 degree angle i e. Every single end should be covered with flashing.

Wide and 2 in. Cut step flashing pieces to be 10 in. Bent into an l shape. Here s how to do it right the first time.

Cut a piece. Longer than the shingle s exposure. Lay shingles over step flashing from the roof edge. Once even a small section of roofing cement fails you ll have a leak.

Lay a shingle over the step flashing starting at the roof edge. Cover tops of step. Nail through flashing into shingle do not extend flashing above top of shingle and. Begin by removing the shingles at the affected area and removing old flashing if present.