Flashing Shed Roof Addition

All flashings must integrate with adjacent materials so water always flows to the exterior following the shingle principle.

Flashing shed roof addition.

Galvanized metal or aluminum is considered the best to use for roof flashing. More questonable or ugly roof wall flashing examples. 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. Flashing was added along that wall to keep the water out.

The new roof matched the slope of the shed roof but it tied in slightly lower on the wall to simplify the building process. Next the sheet siding for the addition was nailed directly to the studs to quickly enclose the space. Details concrete masonry roofing wrb flashing. Click to enlarge make sure the sheathing wrap overlaps all step flashings.

Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. 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. 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. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap.

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