Apply mortar.

Apply mortar. is a detailed work activity in O*NET — a concrete unit of work shared across 4 occupations and seen in 9 occupation-specific tasks. It rolls up into the broader work activity Apply materials to fill gaps or imperfections. in Handling and Moving Objects .

Detailed work activities are the most granular shared layer in O*NET's work-activity hierarchy (Generalized → Intermediate → Detailed → occupation-specific task). The figures below describe how this activity shows up across the economy and what independent studies measure about AI and this kind of work — not a prediction that the work will be automated.

AI exposure

Of the 9 tasks under this activity that the OpenAI / Eloundou “GPTs are GPTs” study rated, 0 (0%) are flagged as directly exposed to language models (E1) or exposed via model-powered tools (E2).

Exposure estimates overlap with model capabilities — whether a model could speed the task up — not whether the work will be done by software. Observed AI use is augmentation and assistance today, not jobs replaced.

Member tasks

Occupation-specific tasks O*NET maps to this detailed work activity, most important first.

• Apply and smooth mortar or other mixture over work surface. · Brickmasons and Blockmasons · importance 4.5 · no direct exposure
• Mix, apply, and spread plaster, concrete, mortar, cement, mastic, glue or other adhesives to form a bed for the tiles, using brush, trowel and screed. · Tile and Stone Setters · importance 4.4 · no direct exposure
• Apply mortar to tile back, position the tile, and press or tap with trowel handle to affix tile to base. · Tile and Stone Setters · importance 4.3 · no direct exposure
• Remove excess mortar with trowels and hand tools, and finish mortar joints with jointing tools, for a sealed, uniform appearance. · Brickmasons and Blockmasons · importance 4.2 · no direct exposure
• Remove wedges, fill joints between stones, finish joints between stones, using a trowel, and smooth the mortar to an attractive finish, using a tuck pointer. · Stonemasons · importance 4.2 · no direct exposure
• Mix and apply mortar or cement to edges and ends of drain tiles to seal halves and joints. · Tile and Stone Setters · importance 4.2 · no direct exposure
• Mix mortar or grout and pour or spread mortar or grout on marble slabs, stone, or foundation. · Stonemasons · importance 4.0 · no direct exposure
• Prepare surfaces for tiling by attaching lath or waterproof paper, or by applying a cement mortar coat to a metal screen. · Tile and Stone Setters · importance 4.0 · no direct exposure
• Apply cement to backs of tiles and press tiles into place, aligning them with layout marks or joints of previously laid tile. · Drywall and Ceiling Tile Installers · importance 2.8 · no direct exposure

Occupations that perform this

• Brickmasons and Blockmasons
• Tile and Stone Setters
• Stonemasons
• Drywall and Ceiling Tile Installers

Sources for this page

Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.

• O*NET 30.3 U.S. Department of Labor / National Center for O*NET Development
• “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130 OpenAI / academic

Data compiled June 2, 2026. Figures are estimates, not advice.

@misc{singulariki-apply-mortar,
  title  = {Apply mortar.},
  author = {{Singulariki}},
  year   = {2026},
  note   = {O*NET 30.3; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130. Accessed June 7, 2026},
  url    = {https://singulariki.com/detailed-activities/apply-mortar}
}