Flashing Shed Roof Addition

Flashing is installed to surround roof features such as vents chimneys and skylights.

Flashing shed roof addition.

Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. All flashings must integrate with adjacent materials so water always flows to the exterior following the shingle principle. Details concrete masonry roofing wrb flashing. One common method is to lay the edge metal under the eaves membrane and over the rake.

Below we illustrate that using a single piece of metal flashing where the uppermost edge of a shed roof abuts a vertical building sidewall works fine though the use of exposed nails see our photo below may form leak or wear points in the roof. Next the sheet siding for the addition was nailed directly to the studs to quickly enclose the space. Roof flashing is a material used as a protectant against water leaks or seepage and is typically made of galvanized metal but it can also be in the form of aluminum sheet metal copper or even plastic. Galvanized metal or aluminum is considered the best to use for roof flashing.

Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap. The new roof matched the slope of the shed roof but it tied in slightly lower on the wall to simplify the building process. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. Click to enlarge make sure the sheathing wrap overlaps all step flashings.

Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.