Bump-out
Also called: bump-out bench, extended bench, pool alcove seat.
A pool bump-out is an alcove pushed outward from the pool wall, so the seating sits in an added pocket rather than being carved out of the swimming area. Builders also call it a bump-out bench or an extended bench.
Why it matters
The point is geometry. A bench cut into a straight wall narrows the pool at that spot, while a bump-out keeps the swim lane intact and adds the seat outside the original outline. That makes it the right answer on a narrow pool or a lap-oriented layout. It costs more than a plain bench because it adds shell, excavation and finish area and complicates the wall geometry. Like every poured seat it closes at gunite and cannot be added later. On a vinyl-liner pool, benches and bump-outs add wall-panel complexity and seams. An above-ground pool cannot have one.