An upstand is the vertical, rising part of a building element — for example the raised edge of a flat roof, the vertical face of a sill, or the riser of a stair tread. The term is used broadly in construction for any component that stands vertically above a horizontal surface.
Applications of the term upstand
Roof upstand
The vertical edge around a flat roof against which the roof covering is dressed. The upstand prevents water from running over the roof edge and into the building.
Sill upstand
The vertical part of a sill that stands against the frame and directs water outward.
Stair riser
The vertical face between two stair treads. Officially called the riser, but in practice the term upstand is also used.
Drawing elevation
In construction drawings, an elevation is the drawing of a facade or wall as viewed straight on — as opposed to a floor plan (plan view) or section.
Roof upstand in detail
| Component | Description |
|---|---|
| **Upstand height** | Minimum 150 mm above the finished roof surface |
| **Waterproofing** | Roof covering (EPDM, bitumen) is turned up against the upstand |
| **Water barrier** | The upstand prevents water from entering the structure at the roof edge |
| **Finish** | Often finished with a coping or zinc profile |
Building a flat-roof upstand
- Construct the upstand from brickwork, plywood or OSB on a timber framework
- Ensure a minimum height of 150 mm above the roof covering
- Apply the roof covering and turn it up at least 100 mm against the upstand
- Seal the junction with a fillet strip or liquid waterproofing
- Fit a coping or zinc cap on top of the upstand
Related terms
- Flat roof
- Fascia board
- Roof gutter
- EPDM
- Bitumen
- Sill