Texmateria
Roughcast / Pebbledash
A rough exterior render made by spraying or casting fine aggregate into a binder. It reads as a grainy mineral skin with shadows in tiny pits and weathering on raised points.
Common names
- pebbledash
- rough render
- sprayed aggregate finish
- dash coat
Search phrases
- rough exterior render
- pebbledash wall
- sprayed rough wall
- gritty house exterior
Common uses
- House exteriors
- Apartment blocks
- Boundary walls
- Public buildings
- Garden walls
Choosing points
- Best for exterior walls where a coarse residential texture or older plaster character is wanted.
- The high points catch dirt, and rain streaks form below sills and vents.
- Older roughcast can crack or shed aggregate.
- Texture scale is coarser than smooth painted plaster.
How it ages
- Exterior durability depends on coating, substrate, cracks, repainting, and water paths.
What to avoid
- Do not use roughcast where people brush against it or cleaning must be easy; the sharp texture can abrade and trap dirt.
