Also pitched valley gutter linings bs en12588 uses maximum code no.
Slate roof flashing details.
Lead slates chimney flashings back gutters apron and side flashings parapet box and tapered gutters 5 to 8 table 3 sizing guidelines to good practice recommended maximum sizes of individual pieces of lead for the following applications.
For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing.
The apron joint with the base sheets is soldered horizontally and vertically.
These items can be fabricated in many different profiles.
Apron and cap flashing should be of at least 16 oz.
Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water.
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.
Two different cants are illustrated.
3a flashings apron and cover.
The shingles or slate must lap the flashing at least 6.
The detail shows a typical open valley flashing for a shingle or slate roof.
Flashing is installed to surround roof features such as vents chimneys and skylights.