Dormer Roof Lead Flashing

Use taller pieces of step flashing towards the top so the pieces can be bent over the dormer roof to help keep out snow and wind blown rain.

Dormer roof lead flashing. Our page top photograph illustrates a successful installation of flashing and counter flashing along intersection of a roof surface with the side of a brick constructed dormer. According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse. A critical juncture that often fails is where these two flashings meet. Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.

Dormer to roof junction this detail illustrates the first method described above using individual copper flashing squares woven between the shingles tile or slate. Start with the right flashing. Lay a bead of roofing cement along the shingles just below the dormer and bed the metal base flashing into it. Because their front and side walls meet the roof in different ways dormers require several techniques to integrate the flashing with the roofing material as well as with the house s water resistive barrier wrb of housewrap or felt paper.

Also they require sidewall flashings. So chances are if you ve been looking into your roof and its flashing you have questions. The flashing extends at least 4 onto the roof and 8 up the wall. Proper installation of flashing and counter flashing at the intersection of a vertical wall with a roof surface is required to avoid roof leaks.