Flashing A Shed Roof To A Wall

Above a lower roof where it abuts the wall.

Flashing a shed roof to a wall.

Where an attached backyard deck meets the house. There sometimes is a problem with movement differences of the wall and the roof decking when the flashing is fastened to both the wall and the roof. Proper roof wall flashing example. Step flashings are interwoven with the shingles and act essentially as shingles with an upturned leg to allow a transition of the vertical drainage plane of the wall to the drainage plane of the roof.

These problem areas include the edges of skylights and chimneys soil stacks vent fans and roof valleys as well as the intersection of the roof deck and dormer walls. Under the eaves of a roof with little overhang and no gutters. Stepped flashing is used where a sloped shingled roof intersects a vertical wall. The narrower step flashing just isn t wide enough to protect the intersection fully.

To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width. Then the house wrap and exterior wall covering are installed over this roof flashing. I recommend 12 in wide step flashings bent for a 5 in. Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings.

In all cases make sure to detail the flashing membrane so that it sheds water. The easiest way to accomplish this is by using smartvent as an off wall shed exhaust ventilating the shed roof without removing the existing flashing and siding off of the shed wall means one less hassle and one less chance of having the expense to replace the wall siding and losing the bid. Flashing provides the extra protection these spots need. Drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies this collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs.

Most flashing is made of galvanized metal but diy ers may prefer aluminum flashing because it s easier to bend. Roof leg and a 7 in. Often with new construction the roof flashing is first nailed to the wall. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

Bigger step flashing is better. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.