The sealant around the flange or faceplate on the exterior wall surface around a thru wall scupper is a maintenance item.
Picture of a roof scupper.
The national roofing contractors association defines scupper as a drainage device in the form of an outlet through a wall parapet wall or raised roof edge typically lined with a sheet metal sleeve it is more often seen in apartments and other commercial buildings though is sometimes found in residential homes constructed with flat roofs.
The top of the roof side flange is extended into a masonry joint.
The detail shows an alternate method of constructing either type of scupper.
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On the roof side overflow scuppers can be detailed similar to detail 10 5d.
Things you should know about roof scuppers.
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Mar 22 2020 explore nova design studios s board scuppers followed by 439 people on pinterest.
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Scuppers are perfect for getting water off a roof but if water flow is restricted and water backs up into the scupper again that will cause leaks.
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Pictures of assorted roof scuppers installed on commercial low slope roofs.
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Browse 224 scuppers on houzz whether you want inspiration for planning scuppers or are building designer scuppers from scratch houzz has 224 pictures from the best designers decorators and architects in the country including staging design network and northwest preferred roofing.
Assorted roof scuppers on commercial low slope roofs.
Scuppers flat roof repair the cause of a major leak was due to incorrect leader headers on the other side of the wall.
The scupper is locked and soldered to the closure flange on all sides.
In short a scupper is a detail that provides drainage to a roof system by allowing the water runoff from the roof to exit the roof through a metal edge parapet wall or through the deck into a downspout or leader not run through the interior of the building.
It prevents water from getting between the metal scupper box and the wall masonry and then backing up into the roof system and into the building.