Lift Pit
The recess at the bottom of a lift shaft housing buffers and equipment, and the lowest point of most buildings.
On an actual building
It collects both groundwater pressing in and anything running down the shaft. Water there reaches buffers, rails and pit wiring, so it is a safety and equipment issue before it is a building one.
What we most often have to correct
That a coating alone will hold it. Active paths must be injected first; a coating over a live leak is pushed off.
Terms that come up alongside this one
- Hydrostatic Pressure
The pressure exerted by standing water against a structure, increasing with depth below the water level..
- PU Grouting
Injection of polyurethane resin that reacts with the water it meets, expanding into a foam or flexible gel and sealing the leak path from within..
- Fillet
A curved or angled cement mortar profile formed at an internal angle so that a waterproofing layer turns the corner on a curve rather than a sharp right angle..
More building elements terms
Lift Pit — questions we get asked
What does lift pit mean in waterproofing?
The recess at the bottom of a lift shaft housing buffers and equipment, and the lowest point of most buildings.
Why does lift pit matter on a real project?
It collects both groundwater pressing in and anything running down the shaft. Water there reaches buffers, rails and pit wiring, so it is a safety and equipment issue before it is a building one.
What do people commonly get wrong about lift pit?
That a coating alone will hold it. Active paths must be injected first; a coating over a live leak is pushed off.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
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