CPC31020 Solid Plastering key terms

Items worn by a worker to reduce exposure to hazards, such as gloves, safety glasses, dust masks, hearing protection and safety footwear. It supplements, but does not replace, higher-level controls like elimination or ventilation.

A document supplied by the manufacturer of a hazardous substance that lists its hazards, safe handling, first aid and storage requirements. Workers must be able to locate and interpret the SDS for products used on site.

Measures used to limit exposure to respirable crystalline silica when cutting, grinding or mixing cement and plaster products. Controls include wet cutting, dust extraction, ventilation and correctly fitted respiratory protection.

A ranked approach to managing risk, from most to least effective: eliminate the hazard, substitute it, engineer controls, apply administration, then use PPE. It guides how a plasterer chooses the best risk treatment.

A documented process that identifies hazards in a task or workplace, evaluates how likely and severe harm could be, and records the controls to be applied before work starts.

A site document describing how high-risk construction work will be carried out safely, including the sequence of steps, hazards and controls. Workers must follow it and stop work if conditions change.

Checks and practices for working at height on scaffolds, trestles or mobile towers, including stable footing, complete guardrails, toe boards, safe access and correct load limits. Only trained or licensed people erect certain scaffolds.

Any task where a person could fall from one level to another and be injured. Plasterers plan for guardrails, platforms, ladder use and clear access to reduce fall risk when working on ceilings and upper walls.

The rule that a leaning ladder is set at roughly a four-to-one ratio of height to base distance, on firm level ground, secured at the top. It prevents slipping and tipping while carrying tools or materials.

Safe techniques for lifting, carrying and moving materials such as plaster bags and sheets. It includes assessing the load, using mechanical aids, team lifting and avoiding twisting or reaching while loaded.

Separating site waste into correct streams, such as clean packaging, set plaster rubble, timber and hazardous chemical containers, so each is recycled or disposed of lawfully without polluting drains or soil.

Techniques that stop plaster slurry, wash water and chemical residue entering stormwater drains or waterways. Methods include settling pits, contained washout bins and never hosing waste into gutters.

The relationship between a drawn dimension and the real size, shown as a ratio such as 1:50 or 1:100. A plasterer uses it to convert measured drawing lengths into actual site dimensions.

A line on a drawing, usually with arrows and a number, that states the size or position of a building element. Plasterers read these to confirm thicknesses, heights and openings before starting work.

A key on a drawing that explains the meaning of symbols, hatching and abbreviations used, such as materials, finishes or services. Correct interpretation prevents costly mistakes during setting out and application.

A written document that sets out the required materials, mix proportions, thicknesses, finishes and standards for a job. It takes priority over drawings where the two conflict unless stated otherwise.

A short written or verbal direction describing how a particular task is to be done, including sequence, materials and finish expectations. It translates the specification into practical steps for the crew.

Marking positions, levels and lines on site or on a surface so work is located accurately. Plasterers set out screed levels, beads and feature lines using measurements from drawings and datums.

A fixed reference point or line from which heights are measured, often transferred with a level or laser. Consistent datum use keeps ceilings, screeds and features aligned across a whole building.

Plumb means exactly vertical; level means exactly horizontal. Plasterers check both continuously so walls, beads and reveals finish true and square without lean or twist.

Treating a surface before plastering so the new material bonds properly. It includes cleaning, removing loose material, correcting suction, fixing cracks and applying a bonding agent or key.

Suction is how strongly a background absorbs water from wet plaster. High suction can dry the mix too fast and cause cracking, so surfaces are dampened or primed to control absorption evenly.

A liquid applied to a surface to improve adhesion between the background and the plaster, especially on smooth or low-suction surfaces. It may also provide a mechanical key for the next coat.

A flat hand tool used to spread, level and compact plaster or render. Wooden floats texture and close the surface; steel floats produce a hard, smooth finish on setting coats.

The hawk is a flat board that holds a mound of plaster; the trowel is the steel blade used to pick up and apply it. Together they are the core hand tools for spreading and finishing coats.

Removing set material from trowels, floats, mixers and buckets after use, drying edges, and storing tools so blades stay straight and rust-free. Clean tools last longer and give better finishes.

A mechanical paddle or drum mixer blends plaster with water. The correct water-to-powder ratio, measured as specified, controls workability, set time and strength; adding extra water weakens the finished plaster.

The period during which wet plaster stiffens and hardens after mixing. It affects how much can be applied in one batch and when finishing tools can be used, and varies with product and temperature.

The first coat of plaster or render applied to a background, deliberately scored or scratched to create a key for the next coat. It is left to set before the following coat is applied.

Applying plaster in successive layers, each bonded to the last, to build thickness and a true finish. Three-coat work typically uses scratch, brown and finish coats for greater accuracy and durability.

A straight strip or band of plaster or mortar fixed to a wall or floor to act as a thickness guide. Screeds are set level or plumb so the whole surface can be ruled off accurately.

A long straight length of metal or timber used to check flatness and to drag excess plaster off between screeds. It reveals high and low spots so they can be corrected while the material is still workable.

A cement-based or polymer-modified coating applied to external masonry and other backgrounds to weatherproof and decorate the surface. It is usually applied in coats with a textured or smooth finish.

Keeping new plaster or render moist and protected while it hardens, so it gains strength and resists cracking. Methods include misting, covering and avoiding direct sun or wind during the early period.

Fine cracks that appear as plaster or render dries and contracts, often from too much water, rapid drying or thick single coats. Correct mixes, curing and coat thickness reduce the risk.

A surface treatment applied for appearance rather than structure, such as textured, stucco, bagged or coloured finishes. It requires consistent technique so pattern and colour are even across the area.

A small trial area of finish prepared and approved before full application. It sets the agreed appearance and workmanship standard against which the completed work is later judged.

Identifying and correcting faults such as hollow spots, cracks, uneven surfaces or poor bonds, then re-finishing to the required standard. Causes are recorded so the same fault is not repeated.