Tempo:
Coal tar products and asphalt products are not compatible and must not be used together. The eave line of projecting roofs is trimmed with metal edging or flashing to direct water away from the fascia board. A gravel stop or cant strip is used in conjunction with the flashing at the eaves when the roof is covered with gravel (Figure 105). Where built-up roofing abuts a wall (except a masonry-clad wall), the roofing is mopped to the cant strip and turned up the wall at least 150 mm (6 in.). The wall sheathing paper and siding is then lapped over the roof membrane).
Where a built-up roof intersects a masonry-clad wall, the roof membrane is turned up the face of the masonry and a flashing is installed over the membrane. A counter-flashing should be embedded into the mortar joints at least 25 mm (1 in.), extend down the wall about 150 mm (6 in.) and lap over the membrane flashing at least 100 mm (4 in.). Single-ply membranes can also be used for low-slope roofs including the small roofs typical of wood-frame construction.
105 Built-up roof
siding sheathing membrane 50 mm (2 in.) minimum lap membrane flashing cant strip roof sheathing built-up roofing
Junction of built up roof and wall covered with siding
metal gravel stop
fascia board
Eave flashing and drip
Where a built-up roof intersects a masonry-clad wall, the roof membrane is turned up the face of the masonry and a flashing is installed over the membrane. A counter-flashing should be embedded into the mortar joints at least 25 mm (1 in.), extend down the wall about 150 mm (6 in.) and lap over the membrane flashing at least 100 mm (4 in.). Single-ply membranes can also be used for low-slope roofs including the small roofs typical of wood-frame construction.
105 Built-up roof
siding sheathing membrane 50 mm (2 in.) minimum lap membrane flashing cant strip roof sheathing built-up roofing
Junction of built up roof and wall covered with siding
metal gravel stop
fascia board
Eave flashing and drip
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