ForMatter/Finishes/stone_finish/Broom-finished concrete
finish_concrete_broom

Broom-finished concrete

stone_finish · textured · broomed concrete, brushed concrete, broom finish, ASTM C309 surface

Wet concrete dragged with a stiff bristle broom while still plastic — the broom strokes leave a uniform, slip-resistant texture. Reads as the standard finish on every sidewalk in North America. Workmanlike, deliberately humble, the cheapest cosmetic finish for poured concrete.

Surface treatment applied to fresh concrete during finishing — after final float, before initial set. Stiff fiber broom (push-broom or specialty concrete-finishing broom) drawn across the wet surface in straight perpendicular strokes; resulting texture 1–3 mm deep. Gives slip-resistance for pedestrian / vehicle surfaces (BCRA / DIN 51097 R-9 to R-11 typical). Direction matters — strokes parallel to traffic flow drain water; perpendicular adds traction. Standard residential and commercial-walk spec. Trumped only by salt-finish or exposed-aggregate where a more deliberate cosmetic register is wanted.

character — directional fiber-stroke texture, soft matte, the public-walkway default.

Finish properties

  • leveltextured
  • subcategoryconcrete textured surface
  • Ra (µm)1500.0
  • applies tostone
Pairs with materials

Second life

reversibilityzero on the existing stone — texture is geometric, present in the substrate. Re-finishing requires removing material to reach a different finish.
blocks substrate recyclingno
renewabilitymoderate — most stone finishes can be re-applied (re-honing, re-flaming) at the cost of minor material loss; field-renewability for indoor surfaces, shop-renewability for outdoor.

Marble Institute of America / Natural Stone Institute care-and-finish guides; ASTM C1242 dimension stone terminology.

Citations

  • url · https://en.wikipedia.org/wiki/Concrete
  • standard · ACI 302.1R — Guide to Concrete Floor and Slab Construction (broom-finish surface texture spec).
  • book · Forty, *Concrete and Culture: A Material History* (Reaktion Books, 2012).