Graphical Construction Glossary >> Roofs and roofing. >> Roof Features >> gutter overflow
This particular parapet gutter shows good design in that it has two sets of outlets, overflows, rainwater heads and downpipes for a fairly short run of about 8M.
It also has the overflows placed directly over the leader heads which allows the water to get away without staining the walls.
Quite commonly the downpipes are at longer intervals, but because the overflows are usually quite small there would be two or three of them
These small items are not to be overlooked because they perform wonders when they are required.
Looking at the drawing above it is easy to see that the level of the bottom of the overflow is well below the height of the box gutter on the roof side.
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